Commit 7cdc9d98c7
Changed files (1)
std
zig
std/zig/render.zig
@@ -1,29 +1,23 @@
const std = @import("../index.zig");
+const builtin = @import("builtin");
const assert = std.debug.assert;
const mem = std.mem;
const ast = std.zig.ast;
const Token = std.zig.Token;
-const RenderState = union(enum) {
- TopLevelDecl: &ast.Node,
- ParamDecl: &ast.Node,
- Text: []const u8,
- Expression: &ast.Node,
- VarDecl: &ast.Node.VarDecl,
- Statement: &ast.Node,
- PrintIndent,
- Indent: usize,
- MaybeSemiColon: &ast.Node,
- Token: ast.TokenIndex,
- NonBreakToken: ast.TokenIndex,
+const indent_delta = 4;
+
+pub const Error = error {
+ /// Ran out of memory allocating call stack frames to complete rendering.
+ OutOfMemory,
};
-const indent_delta = 4;
+pub fn render(allocator: &mem.Allocator, stream: var, tree: &ast.Tree) (@typeOf(stream).Child.Error || Error)!void {
+ comptime assert(@typeId(@typeOf(stream)) == builtin.TypeId.Pointer);
-pub fn render(allocator: &mem.Allocator, stream: var, tree: &ast.Tree) !void {
var it = tree.root_node.decls.iterator(0);
while (it.next()) |decl| {
- try renderTopLevelDecl(allocator, stream, tree, *decl);
+ try renderTopLevelDecl(allocator, stream, tree, 0, *decl);
if (it.peek()) |next_decl| {
const n = if (nodeLineOffset(tree, *decl, *next_decl) >= 2) u8(2) else u8(1);
try stream.writeByteNTimes('\n', n);
@@ -38,1202 +32,1165 @@ fn nodeLineOffset(tree: &ast.Tree, a: &ast.Node, b: &ast.Node) usize {
return loc.line;
}
-fn renderTopLevelDecl(allocator: &mem.Allocator, stream: var, tree: &ast.Tree, decl_ptr: &ast.Node) !void {
- var stack = std.ArrayList(RenderState).init(allocator);
- defer stack.deinit();
+fn renderTopLevelDecl(allocator: &mem.Allocator, stream: var, tree: &ast.Tree, indent: usize, decl: &ast.Node) (@typeOf(stream).Child.Error || Error)!void {
+ switch (decl.id) {
+ ast.Node.Id.FnProto => {
+ const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", decl);
- try stack.append(RenderState {.TopLevelDecl = decl_ptr});
+ try renderComments(tree, stream, fn_proto, indent);
+ try renderExpression(allocator, stream, tree, indent, decl);
- var indent: usize = 0;
- while (stack.popOrNull()) |state| {
- switch (state) {
- RenderState.TopLevelDecl => |decl| {
- switch (decl.id) {
- ast.Node.Id.FnProto => {
- const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", decl);
- try renderComments(tree, stream, fn_proto, indent);
+ if (fn_proto.body_node) |body_node| {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, body_node);
+ } else {
+ try stream.write(";");
+ }
+ },
+ ast.Node.Id.Use => {
+ const use_decl = @fieldParentPtr(ast.Node.Use, "base", decl);
- if (fn_proto.body_node) |body_node| {
- stack.append(RenderState { .Expression = body_node}) catch unreachable;
- try stack.append(RenderState { .Text = " "});
- } else {
- stack.append(RenderState { .Text = ";" }) catch unreachable;
- }
+ if (use_decl.visib_token) |visib_token| {
+ try stream.print("{} ", tree.tokenSlice(visib_token));
+ }
+ try stream.write("use ");
+ try renderExpression(allocator, stream, tree, indent, use_decl.expr);
+ try stream.write(";");
+ },
+ ast.Node.Id.VarDecl => {
+ const var_decl = @fieldParentPtr(ast.Node.VarDecl, "base", decl);
+
+ try renderComments(tree, stream, var_decl, indent);
+ try renderVarDecl(allocator, stream, tree, indent, var_decl);
+ },
+ ast.Node.Id.TestDecl => {
+ const test_decl = @fieldParentPtr(ast.Node.TestDecl, "base", decl);
+
+ try renderComments(tree, stream, test_decl, indent);
+ try stream.write("test ");
+ try renderExpression(allocator, stream, tree, indent, test_decl.name);
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, test_decl.body_node);
+ },
+ ast.Node.Id.StructField => {
+ const field = @fieldParentPtr(ast.Node.StructField, "base", decl);
+
+ try renderComments(tree, stream, field, indent);
+ if (field.visib_token) |visib_token| {
+ try stream.print("{} ", tree.tokenSlice(visib_token));
+ }
+ try stream.print("{}: ", tree.tokenSlice(field.name_token));
+ try renderExpression(allocator, stream, tree, indent, field.type_expr);
+ try renderToken(tree, stream, field.lastToken() + 1, indent, true);
+ },
+ ast.Node.Id.UnionTag => {
+ const tag = @fieldParentPtr(ast.Node.UnionTag, "base", decl);
+
+ try renderComments(tree, stream, tag, indent);
+ try stream.print("{}", tree.tokenSlice(tag.name_token));
+
+ if (tag.type_expr) |type_expr| {
+ try stream.print(": ");
+ try renderExpression(allocator, stream, tree, indent, type_expr);
+ }
- try stack.append(RenderState { .Expression = decl });
- },
- ast.Node.Id.Use => {
- const use_decl = @fieldParentPtr(ast.Node.Use, "base", decl);
- if (use_decl.visib_token) |visib_token| {
- try stream.print("{} ", tree.tokenSlice(visib_token));
- }
- try stream.print("use ");
- try stack.append(RenderState { .Text = ";" });
- try stack.append(RenderState { .Expression = use_decl.expr });
- },
- ast.Node.Id.VarDecl => {
- const var_decl = @fieldParentPtr(ast.Node.VarDecl, "base", decl);
- try renderComments(tree, stream, var_decl, indent);
- try stack.append(RenderState { .VarDecl = var_decl});
- },
- ast.Node.Id.TestDecl => {
- const test_decl = @fieldParentPtr(ast.Node.TestDecl, "base", decl);
- try renderComments(tree, stream, test_decl, indent);
- try stream.print("test ");
- try stack.append(RenderState { .Expression = test_decl.body_node });
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = test_decl.name });
- },
- ast.Node.Id.StructField => {
- const field = @fieldParentPtr(ast.Node.StructField, "base", decl);
- try renderComments(tree, stream, field, indent);
- if (field.visib_token) |visib_token| {
- try stream.print("{} ", tree.tokenSlice(visib_token));
- }
- try stream.print("{}: ", tree.tokenSlice(field.name_token));
- try stack.append(RenderState { .Token = field.lastToken() + 1 });
- try stack.append(RenderState { .Expression = field.type_expr});
- },
- ast.Node.Id.UnionTag => {
- const tag = @fieldParentPtr(ast.Node.UnionTag, "base", decl);
- try renderComments(tree, stream, tag, indent);
- try stream.print("{}", tree.tokenSlice(tag.name_token));
-
- try stack.append(RenderState { .Text = "," });
-
- if (tag.value_expr) |value_expr| {
- try stack.append(RenderState { .Expression = value_expr });
- try stack.append(RenderState { .Text = " = " });
- }
+ if (tag.value_expr) |value_expr| {
+ try stream.print(" = ");
+ try renderExpression(allocator, stream, tree, indent, value_expr);
+ }
- if (tag.type_expr) |type_expr| {
- try stream.print(": ");
- try stack.append(RenderState { .Expression = type_expr});
- }
- },
- ast.Node.Id.EnumTag => {
- const tag = @fieldParentPtr(ast.Node.EnumTag, "base", decl);
- try renderComments(tree, stream, tag, indent);
- try stream.print("{}", tree.tokenSlice(tag.name_token));
-
- try stack.append(RenderState { .Text = "," });
- if (tag.value) |value| {
- try stream.print(" = ");
- try stack.append(RenderState { .Expression = value});
- }
- },
- ast.Node.Id.ErrorTag => {
- const tag = @fieldParentPtr(ast.Node.ErrorTag, "base", decl);
- try renderComments(tree, stream, tag, indent);
- try stream.print("{}", tree.tokenSlice(tag.name_token));
- },
- ast.Node.Id.Comptime => {
- try stack.append(RenderState { .MaybeSemiColon = decl });
- try stack.append(RenderState { .Expression = decl });
- },
- ast.Node.Id.LineComment => {
- const line_comment_node = @fieldParentPtr(ast.Node.LineComment, "base", decl);
- try stream.write(tree.tokenSlice(line_comment_node.token));
- },
- else => unreachable,
- }
- },
-
- RenderState.VarDecl => |var_decl| {
- try stack.append(RenderState { .Token = var_decl.semicolon_token });
- if (var_decl.init_node) |init_node| {
- try stack.append(RenderState { .Expression = init_node });
- const text = if (init_node.id == ast.Node.Id.MultilineStringLiteral) " =" else " = ";
- try stack.append(RenderState { .Text = text });
- }
- if (var_decl.align_node) |align_node| {
- try stack.append(RenderState { .Text = ")" });
- try stack.append(RenderState { .Expression = align_node });
- try stack.append(RenderState { .Text = " align(" });
- }
- if (var_decl.type_node) |type_node| {
- try stack.append(RenderState { .Expression = type_node });
- try stack.append(RenderState { .Text = ": " });
- }
- try stack.append(RenderState { .Text = tree.tokenSlice(var_decl.name_token) });
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(var_decl.mut_token) });
+ try stream.write(",");
+ },
+ ast.Node.Id.EnumTag => {
+ const tag = @fieldParentPtr(ast.Node.EnumTag, "base", decl);
- if (var_decl.comptime_token) |comptime_token| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(comptime_token) });
- }
+ try renderComments(tree, stream, tag, indent);
+ try stream.print("{}", tree.tokenSlice(tag.name_token));
- if (var_decl.extern_export_token) |extern_export_token| {
- if (var_decl.lib_name != null) {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = ??var_decl.lib_name });
+ if (tag.value) |value| {
+ try stream.print(" = ");
+ try renderExpression(allocator, stream, tree, indent, value);
+ }
+
+ try stream.write(",");
+ },
+ ast.Node.Id.ErrorTag => {
+ const tag = @fieldParentPtr(ast.Node.ErrorTag, "base", decl);
+
+ try renderComments(tree, stream, tag, indent);
+ try stream.print("{}", tree.tokenSlice(tag.name_token));
+ },
+ ast.Node.Id.Comptime => {
+ try renderExpression(allocator, stream, tree, indent, decl);
+ try maybeRenderSemicolon(stream, tree, indent, decl);
+ },
+ ast.Node.Id.LineComment => {
+ const line_comment_node = @fieldParentPtr(ast.Node.LineComment, "base", decl);
+
+ try stream.write(tree.tokenSlice(line_comment_node.token));
+ },
+ else => unreachable,
+ }
+}
+
+fn renderExpression(allocator: &mem.Allocator, stream: var, tree: &ast.Tree, indent: usize, base: &ast.Node) (@typeOf(stream).Child.Error || Error)!void {
+ switch (base.id) {
+ ast.Node.Id.Identifier => {
+ const identifier = @fieldParentPtr(ast.Node.Identifier, "base", base);
+ try stream.print("{}", tree.tokenSlice(identifier.token));
+ },
+ ast.Node.Id.Block => {
+ const block = @fieldParentPtr(ast.Node.Block, "base", base);
+ if (block.label) |label| {
+ try stream.print("{}: ", tree.tokenSlice(label));
+ }
+
+ if (block.statements.len == 0) {
+ try stream.write("{}");
+ } else {
+ try stream.write("{\n");
+ const block_indent = indent + indent_delta;
+
+ var it = block.statements.iterator(0);
+ while (it.next()) |statement| {
+ try stream.writeByteNTimes(' ', block_indent);
+ try renderStatement(allocator, stream, tree, block_indent, *statement);
+
+ if (it.peek()) |next_statement| {
+ const n = if (nodeLineOffset(tree, *statement, *next_statement) >= 2) u8(2) else u8(1);
+ try stream.writeByteNTimes('\n', n);
}
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(extern_export_token) });
}
- if (var_decl.visib_token) |visib_token| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(visib_token) });
- }
- },
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ try stream.write("}");
+ }
+ },
+ ast.Node.Id.Defer => {
+ const defer_node = @fieldParentPtr(ast.Node.Defer, "base", base);
+ try stream.print("{} ", tree.tokenSlice(defer_node.defer_token));
+ try renderExpression(allocator, stream, tree, indent, defer_node.expr);
+ },
+ ast.Node.Id.Comptime => {
+ const comptime_node = @fieldParentPtr(ast.Node.Comptime, "base", base);
+ try stream.print("{} ", tree.tokenSlice(comptime_node.comptime_token));
+ try renderExpression(allocator, stream, tree, indent, comptime_node.expr);
+ },
+ ast.Node.Id.AsyncAttribute => {
+ const async_attr = @fieldParentPtr(ast.Node.AsyncAttribute, "base", base);
+ try stream.print("{}", tree.tokenSlice(async_attr.async_token));
+
+ if (async_attr.allocator_type) |allocator_type| {
+ try stream.write("<");
+ try renderExpression(allocator, stream, tree, indent, allocator_type);
+ try stream.write(">");
+ }
+ },
+ ast.Node.Id.Suspend => {
+ const suspend_node = @fieldParentPtr(ast.Node.Suspend, "base", base);
+ if (suspend_node.label) |label| {
+ try stream.print("{}: ", tree.tokenSlice(label));
+ }
+ try stream.print("{}", tree.tokenSlice(suspend_node.suspend_token));
- RenderState.ParamDecl => |base| {
- const param_decl = @fieldParentPtr(ast.Node.ParamDecl, "base", base);
- if (param_decl.comptime_token) |comptime_token| {
- try stream.print("{} ", tree.tokenSlice(comptime_token));
- }
- if (param_decl.noalias_token) |noalias_token| {
- try stream.print("{} ", tree.tokenSlice(noalias_token));
- }
- if (param_decl.name_token) |name_token| {
- try stream.print("{}: ", tree.tokenSlice(name_token));
- }
- if (param_decl.var_args_token) |var_args_token| {
- try stream.print("{}", tree.tokenSlice(var_args_token));
- } else {
- try stack.append(RenderState { .Expression = param_decl.type_node});
- }
- },
- RenderState.Text => |bytes| {
- try stream.write(bytes);
- },
- RenderState.Expression => |base| switch (base.id) {
- ast.Node.Id.Identifier => {
- const identifier = @fieldParentPtr(ast.Node.Identifier, "base", base);
- try stream.print("{}", tree.tokenSlice(identifier.token));
- },
- ast.Node.Id.Block => {
- const block = @fieldParentPtr(ast.Node.Block, "base", base);
- if (block.label) |label| {
- try stream.print("{}: ", tree.tokenSlice(label));
- }
+ if (suspend_node.payload) |payload| {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, payload);
+ }
- if (block.statements.len == 0) {
- try stream.write("{}");
- } else {
- try stream.write("{");
- try stack.append(RenderState { .Text = "}"});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent});
- try stack.append(RenderState { .Text = "\n"});
- var i = block.statements.len;
- while (i != 0) {
- i -= 1;
- const statement_node = *block.statements.at(i);
- try stack.append(RenderState { .Statement = statement_node});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent + indent_delta});
- try stack.append(RenderState {
- .Text = blk: {
- if (i != 0) {
- const prev_node = *block.statements.at(i - 1);
- const prev_node_last_token_end = tree.tokens.at(prev_node.lastToken()).end;
- const loc = tree.tokenLocation(prev_node_last_token_end, statement_node.firstToken());
- if (loc.line >= 2) {
- break :blk "\n\n";
- }
- }
- break :blk "\n";
- },
- });
- }
- }
- },
- ast.Node.Id.Defer => {
- const defer_node = @fieldParentPtr(ast.Node.Defer, "base", base);
- try stream.print("{} ", tree.tokenSlice(defer_node.defer_token));
- try stack.append(RenderState { .Expression = defer_node.expr });
- },
- ast.Node.Id.Comptime => {
- const comptime_node = @fieldParentPtr(ast.Node.Comptime, "base", base);
- try stream.print("{} ", tree.tokenSlice(comptime_node.comptime_token));
- try stack.append(RenderState { .Expression = comptime_node.expr });
- },
- ast.Node.Id.AsyncAttribute => {
- const async_attr = @fieldParentPtr(ast.Node.AsyncAttribute, "base", base);
- try stream.print("{}", tree.tokenSlice(async_attr.async_token));
-
- if (async_attr.allocator_type) |allocator_type| {
- try stack.append(RenderState { .Text = ">" });
- try stack.append(RenderState { .Expression = allocator_type });
- try stack.append(RenderState { .Text = "<" });
+ if (suspend_node.body) |body| {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, body);
+ }
+
+ },
+
+ ast.Node.Id.InfixOp => {
+ const infix_op_node = @fieldParentPtr(ast.Node.InfixOp, "base", base);
+
+ try renderExpression(allocator, stream, tree, indent, infix_op_node.lhs);
+
+ const text = switch (infix_op_node.op) {
+ ast.Node.InfixOp.Op.Add => " + ",
+ ast.Node.InfixOp.Op.AddWrap => " +% ",
+ ast.Node.InfixOp.Op.ArrayCat => " ++ ",
+ ast.Node.InfixOp.Op.ArrayMult => " ** ",
+ ast.Node.InfixOp.Op.Assign => " = ",
+ ast.Node.InfixOp.Op.AssignBitAnd => " &= ",
+ ast.Node.InfixOp.Op.AssignBitOr => " |= ",
+ ast.Node.InfixOp.Op.AssignBitShiftLeft => " <<= ",
+ ast.Node.InfixOp.Op.AssignBitShiftRight => " >>= ",
+ ast.Node.InfixOp.Op.AssignBitXor => " ^= ",
+ ast.Node.InfixOp.Op.AssignDiv => " /= ",
+ ast.Node.InfixOp.Op.AssignMinus => " -= ",
+ ast.Node.InfixOp.Op.AssignMinusWrap => " -%= ",
+ ast.Node.InfixOp.Op.AssignMod => " %= ",
+ ast.Node.InfixOp.Op.AssignPlus => " += ",
+ ast.Node.InfixOp.Op.AssignPlusWrap => " +%= ",
+ ast.Node.InfixOp.Op.AssignTimes => " *= ",
+ ast.Node.InfixOp.Op.AssignTimesWarp => " *%= ",
+ ast.Node.InfixOp.Op.BangEqual => " != ",
+ ast.Node.InfixOp.Op.BitAnd => " & ",
+ ast.Node.InfixOp.Op.BitOr => " | ",
+ ast.Node.InfixOp.Op.BitShiftLeft => " << ",
+ ast.Node.InfixOp.Op.BitShiftRight => " >> ",
+ ast.Node.InfixOp.Op.BitXor => " ^ ",
+ ast.Node.InfixOp.Op.BoolAnd => " and ",
+ ast.Node.InfixOp.Op.BoolOr => " or ",
+ ast.Node.InfixOp.Op.Div => " / ",
+ ast.Node.InfixOp.Op.EqualEqual => " == ",
+ ast.Node.InfixOp.Op.ErrorUnion => "!",
+ ast.Node.InfixOp.Op.GreaterOrEqual => " >= ",
+ ast.Node.InfixOp.Op.GreaterThan => " > ",
+ ast.Node.InfixOp.Op.LessOrEqual => " <= ",
+ ast.Node.InfixOp.Op.LessThan => " < ",
+ ast.Node.InfixOp.Op.MergeErrorSets => " || ",
+ ast.Node.InfixOp.Op.Mod => " % ",
+ ast.Node.InfixOp.Op.Mult => " * ",
+ ast.Node.InfixOp.Op.MultWrap => " *% ",
+ ast.Node.InfixOp.Op.Period => ".",
+ ast.Node.InfixOp.Op.Sub => " - ",
+ ast.Node.InfixOp.Op.SubWrap => " -% ",
+ ast.Node.InfixOp.Op.UnwrapMaybe => " ?? ",
+ ast.Node.InfixOp.Op.Range => " ... ",
+ ast.Node.InfixOp.Op.Catch => |maybe_payload| blk: {
+ try stream.write(" catch ");
+ if (maybe_payload) |payload| {
+ try renderExpression(allocator, stream, tree, indent, payload);
+ try stream.write(" ");
}
+ break :blk "";
},
- ast.Node.Id.Suspend => {
- const suspend_node = @fieldParentPtr(ast.Node.Suspend, "base", base);
- if (suspend_node.label) |label| {
- try stream.print("{}: ", tree.tokenSlice(label));
+ };
+
+ try stream.write(text);
+ try renderExpression(allocator, stream, tree, indent, infix_op_node.rhs);
+ },
+
+ ast.Node.Id.PrefixOp => {
+ const prefix_op_node = @fieldParentPtr(ast.Node.PrefixOp, "base", base);
+
+ switch (prefix_op_node.op) {
+ ast.Node.PrefixOp.Op.AddrOf => |addr_of_info| {
+ try stream.write("&");
+ if (addr_of_info.align_expr) |align_expr| {
+ try stream.write("align(");
+ try renderExpression(allocator, stream, tree, indent, align_expr);
+ try stream.write(") ");
}
- try stream.print("{}", tree.tokenSlice(suspend_node.suspend_token));
-
- if (suspend_node.body) |body| {
- try stack.append(RenderState { .Expression = body });
- try stack.append(RenderState { .Text = " " });
+ if (addr_of_info.const_token != null) {
+ try stream.write("const ");
}
-
- if (suspend_node.payload) |payload| {
- try stack.append(RenderState { .Expression = payload });
- try stack.append(RenderState { .Text = " " });
+ if (addr_of_info.volatile_token != null) {
+ try stream.write("volatile ");
}
},
- ast.Node.Id.InfixOp => {
- const prefix_op_node = @fieldParentPtr(ast.Node.InfixOp, "base", base);
- try stack.append(RenderState { .Expression = prefix_op_node.rhs });
-
- if (prefix_op_node.op == ast.Node.InfixOp.Op.Catch) {
- if (prefix_op_node.op.Catch) |payload| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = payload });
- }
- try stack.append(RenderState { .Text = " catch " });
- } else {
- const text = switch (prefix_op_node.op) {
- ast.Node.InfixOp.Op.Add => " + ",
- ast.Node.InfixOp.Op.AddWrap => " +% ",
- ast.Node.InfixOp.Op.ArrayCat => " ++ ",
- ast.Node.InfixOp.Op.ArrayMult => " ** ",
- ast.Node.InfixOp.Op.Assign => " = ",
- ast.Node.InfixOp.Op.AssignBitAnd => " &= ",
- ast.Node.InfixOp.Op.AssignBitOr => " |= ",
- ast.Node.InfixOp.Op.AssignBitShiftLeft => " <<= ",
- ast.Node.InfixOp.Op.AssignBitShiftRight => " >>= ",
- ast.Node.InfixOp.Op.AssignBitXor => " ^= ",
- ast.Node.InfixOp.Op.AssignDiv => " /= ",
- ast.Node.InfixOp.Op.AssignMinus => " -= ",
- ast.Node.InfixOp.Op.AssignMinusWrap => " -%= ",
- ast.Node.InfixOp.Op.AssignMod => " %= ",
- ast.Node.InfixOp.Op.AssignPlus => " += ",
- ast.Node.InfixOp.Op.AssignPlusWrap => " +%= ",
- ast.Node.InfixOp.Op.AssignTimes => " *= ",
- ast.Node.InfixOp.Op.AssignTimesWarp => " *%= ",
- ast.Node.InfixOp.Op.BangEqual => " != ",
- ast.Node.InfixOp.Op.BitAnd => " & ",
- ast.Node.InfixOp.Op.BitOr => " | ",
- ast.Node.InfixOp.Op.BitShiftLeft => " << ",
- ast.Node.InfixOp.Op.BitShiftRight => " >> ",
- ast.Node.InfixOp.Op.BitXor => " ^ ",
- ast.Node.InfixOp.Op.BoolAnd => " and ",
- ast.Node.InfixOp.Op.BoolOr => " or ",
- ast.Node.InfixOp.Op.Div => " / ",
- ast.Node.InfixOp.Op.EqualEqual => " == ",
- ast.Node.InfixOp.Op.ErrorUnion => "!",
- ast.Node.InfixOp.Op.GreaterOrEqual => " >= ",
- ast.Node.InfixOp.Op.GreaterThan => " > ",
- ast.Node.InfixOp.Op.LessOrEqual => " <= ",
- ast.Node.InfixOp.Op.LessThan => " < ",
- ast.Node.InfixOp.Op.MergeErrorSets => " || ",
- ast.Node.InfixOp.Op.Mod => " % ",
- ast.Node.InfixOp.Op.Mult => " * ",
- ast.Node.InfixOp.Op.MultWrap => " *% ",
- ast.Node.InfixOp.Op.Period => ".",
- ast.Node.InfixOp.Op.Sub => " - ",
- ast.Node.InfixOp.Op.SubWrap => " -% ",
- ast.Node.InfixOp.Op.UnwrapMaybe => " ?? ",
- ast.Node.InfixOp.Op.Range => " ... ",
- ast.Node.InfixOp.Op.Catch => unreachable,
- };
-
- try stack.append(RenderState { .Text = text });
+ ast.Node.PrefixOp.Op.SliceType => |addr_of_info| {
+ try stream.write("[]");
+ if (addr_of_info.align_expr) |align_expr| {
+ try stream.print("align(");
+ try renderExpression(allocator, stream, tree, indent, align_expr);
+ try stream.print(") ");
}
- try stack.append(RenderState { .Expression = prefix_op_node.lhs });
- },
- ast.Node.Id.PrefixOp => {
- const prefix_op_node = @fieldParentPtr(ast.Node.PrefixOp, "base", base);
- try stack.append(RenderState { .Expression = prefix_op_node.rhs });
- switch (prefix_op_node.op) {
- ast.Node.PrefixOp.Op.AddrOf => |addr_of_info| {
- try stream.write("&");
- if (addr_of_info.volatile_token != null) {
- try stack.append(RenderState { .Text = "volatile "});
- }
- if (addr_of_info.const_token != null) {
- try stack.append(RenderState { .Text = "const "});
- }
- if (addr_of_info.align_expr) |align_expr| {
- try stream.print("align(");
- try stack.append(RenderState { .Text = ") "});
- try stack.append(RenderState { .Expression = align_expr});
- }
- },
- ast.Node.PrefixOp.Op.SliceType => |addr_of_info| {
- try stream.write("[]");
- if (addr_of_info.volatile_token != null) {
- try stack.append(RenderState { .Text = "volatile "});
- }
- if (addr_of_info.const_token != null) {
- try stack.append(RenderState { .Text = "const "});
- }
- if (addr_of_info.align_expr) |align_expr| {
- try stream.print("align(");
- try stack.append(RenderState { .Text = ") "});
- try stack.append(RenderState { .Expression = align_expr});
- }
- },
- ast.Node.PrefixOp.Op.ArrayType => |array_index| {
- try stack.append(RenderState { .Text = "]"});
- try stack.append(RenderState { .Expression = array_index});
- try stack.append(RenderState { .Text = "["});
- },
- ast.Node.PrefixOp.Op.BitNot => try stream.write("~"),
- ast.Node.PrefixOp.Op.BoolNot => try stream.write("!"),
- ast.Node.PrefixOp.Op.Deref => try stream.write("*"),
- ast.Node.PrefixOp.Op.Negation => try stream.write("-"),
- ast.Node.PrefixOp.Op.NegationWrap => try stream.write("-%"),
- ast.Node.PrefixOp.Op.Try => try stream.write("try "),
- ast.Node.PrefixOp.Op.UnwrapMaybe => try stream.write("??"),
- ast.Node.PrefixOp.Op.MaybeType => try stream.write("?"),
- ast.Node.PrefixOp.Op.Await => try stream.write("await "),
- ast.Node.PrefixOp.Op.Cancel => try stream.write("cancel "),
- ast.Node.PrefixOp.Op.Resume => try stream.write("resume "),
+ if (addr_of_info.const_token != null) {
+ try stream.print("const ");
}
- },
- ast.Node.Id.SuffixOp => {
- const suffix_op = @fieldParentPtr(ast.Node.SuffixOp, "base", base);
-
- switch (suffix_op.op) {
- @TagType(ast.Node.SuffixOp.Op).Call => |*call_info| {
- try stack.append(RenderState { .Text = ")"});
- var i = call_info.params.len;
- while (i != 0) {
- i -= 1;
- const param_node = *call_info.params.at(i);
- try stack.append(RenderState { .Expression = param_node});
- if (i != 0) {
- try stack.append(RenderState { .Text = ", " });
- }
- }
- try stack.append(RenderState { .Text = "("});
- try stack.append(RenderState { .Expression = suffix_op.lhs });
-
- if (call_info.async_attr) |async_attr| {
- try stack.append(RenderState { .Text = " "});
- try stack.append(RenderState { .Expression = &async_attr.base });
- }
- },
- ast.Node.SuffixOp.Op.ArrayAccess => |index_expr| {
- try stack.append(RenderState { .Text = "]"});
- try stack.append(RenderState { .Expression = index_expr});
- try stack.append(RenderState { .Text = "["});
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- },
- @TagType(ast.Node.SuffixOp.Op).Slice => |range| {
- try stack.append(RenderState { .Text = "]"});
- if (range.end) |end| {
- try stack.append(RenderState { .Expression = end});
- }
- try stack.append(RenderState { .Text = ".."});
- try stack.append(RenderState { .Expression = range.start});
- try stack.append(RenderState { .Text = "["});
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- },
- ast.Node.SuffixOp.Op.StructInitializer => |*field_inits| {
- if (field_inits.len == 0) {
- try stack.append(RenderState { .Text = "{}" });
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- continue;
- }
- if (field_inits.len == 1) {
- const field_init = *field_inits.at(0);
-
- try stack.append(RenderState { .Text = " }" });
- try stack.append(RenderState { .Expression = field_init });
- try stack.append(RenderState { .Text = "{ " });
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- continue;
- }
- try stack.append(RenderState { .Text = "}"});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Text = "\n" });
- var i = field_inits.len;
- while (i != 0) {
- i -= 1;
- const field_init = *field_inits.at(i);
- if (field_init.id != ast.Node.Id.LineComment) {
- try stack.append(RenderState { .Text = "," });
- }
- try stack.append(RenderState { .Expression = field_init });
- try stack.append(RenderState.PrintIndent);
- if (i != 0) {
- try stack.append(RenderState { .Text = blk: {
- const prev_node = *field_inits.at(i - 1);
- const prev_node_last_token_end = tree.tokens.at(prev_node.lastToken()).end;
- const loc = tree.tokenLocation(prev_node_last_token_end, field_init.firstToken());
- if (loc.line >= 2) {
- break :blk "\n\n";
- }
- break :blk "\n";
- }});
- }
- }
- try stack.append(RenderState { .Indent = indent + indent_delta });
- try stack.append(RenderState { .Text = "{\n"});
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- },
- ast.Node.SuffixOp.Op.ArrayInitializer => |*exprs| {
- if (exprs.len == 0) {
- try stack.append(RenderState { .Text = "{}" });
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- continue;
- }
- if (exprs.len == 1) {
- const expr = *exprs.at(0);
-
- try stack.append(RenderState { .Text = "}" });
- try stack.append(RenderState { .Expression = expr });
- try stack.append(RenderState { .Text = "{" });
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- continue;
- }
-
- try stack.append(RenderState { .Text = "}"});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent });
- var i = exprs.len;
- while (i != 0) {
- i -= 1;
- const expr = *exprs.at(i);
- try stack.append(RenderState { .Text = ",\n" });
- try stack.append(RenderState { .Expression = expr });
- try stack.append(RenderState.PrintIndent);
- }
- try stack.append(RenderState { .Indent = indent + indent_delta });
- try stack.append(RenderState { .Text = "{\n"});
- try stack.append(RenderState { .Expression = suffix_op.lhs });
- },
+ if (addr_of_info.volatile_token != null) {
+ try stream.print("volatile ");
}
},
- ast.Node.Id.ControlFlowExpression => {
- const flow_expr = @fieldParentPtr(ast.Node.ControlFlowExpression, "base", base);
+ ast.Node.PrefixOp.Op.ArrayType => |array_index| {
+ try stream.print("[");
+ try renderExpression(allocator, stream, tree, indent, array_index);
+ try stream.print("]");
+ },
+ ast.Node.PrefixOp.Op.BitNot => try stream.write("~"),
+ ast.Node.PrefixOp.Op.BoolNot => try stream.write("!"),
+ ast.Node.PrefixOp.Op.Deref => try stream.write("*"),
+ ast.Node.PrefixOp.Op.Negation => try stream.write("-"),
+ ast.Node.PrefixOp.Op.NegationWrap => try stream.write("-%"),
+ ast.Node.PrefixOp.Op.Try => try stream.write("try "),
+ ast.Node.PrefixOp.Op.UnwrapMaybe => try stream.write("??"),
+ ast.Node.PrefixOp.Op.MaybeType => try stream.write("?"),
+ ast.Node.PrefixOp.Op.Await => try stream.write("await "),
+ ast.Node.PrefixOp.Op.Cancel => try stream.write("cancel "),
+ ast.Node.PrefixOp.Op.Resume => try stream.write("resume "),
+ }
+
+ try renderExpression(allocator, stream, tree, indent, prefix_op_node.rhs);
+ },
- if (flow_expr.rhs) |rhs| {
- try stack.append(RenderState { .Expression = rhs });
- try stack.append(RenderState { .Text = " " });
+ ast.Node.Id.SuffixOp => {
+ const suffix_op = @fieldParentPtr(ast.Node.SuffixOp, "base", base);
+
+ switch (suffix_op.op) {
+ @TagType(ast.Node.SuffixOp.Op).Call => |*call_info| {
+ if (call_info.async_attr) |async_attr| {
+ try renderExpression(allocator, stream, tree, indent, &async_attr.base);
+ try stream.write(" ");
}
- switch (flow_expr.kind) {
- ast.Node.ControlFlowExpression.Kind.Break => |maybe_label| {
- try stream.print("break");
- if (maybe_label) |label| {
- try stream.print(" :");
- try stack.append(RenderState { .Expression = label });
- }
- },
- ast.Node.ControlFlowExpression.Kind.Continue => |maybe_label| {
- try stream.print("continue");
- if (maybe_label) |label| {
- try stream.print(" :");
- try stack.append(RenderState { .Expression = label });
- }
- },
- ast.Node.ControlFlowExpression.Kind.Return => {
- try stream.print("return");
- },
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("(");
+ var it = call_info.params.iterator(0);
+ while (it.next()) |param_node| {
+ try renderExpression(allocator, stream, tree, indent, *param_node);
+ if (it.peek() != null) {
+ try stream.write(", ");
+ }
}
+
+ try stream.write(")");
},
- ast.Node.Id.Payload => {
- const payload = @fieldParentPtr(ast.Node.Payload, "base", base);
- try stack.append(RenderState { .Text = "|"});
- try stack.append(RenderState { .Expression = payload.error_symbol });
- try stack.append(RenderState { .Text = "|"});
+
+ ast.Node.SuffixOp.Op.ArrayAccess => |index_expr| {
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("[");
+ try renderExpression(allocator, stream, tree, indent, index_expr);
+ try stream.write("]");
},
- ast.Node.Id.PointerPayload => {
- const payload = @fieldParentPtr(ast.Node.PointerPayload, "base", base);
- try stack.append(RenderState { .Text = "|"});
- try stack.append(RenderState { .Expression = payload.value_symbol });
- if (payload.ptr_token) |ptr_token| {
- try stack.append(RenderState { .Text = tree.tokenSlice(ptr_token) });
+ @TagType(ast.Node.SuffixOp.Op).Slice => |range| {
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("[");
+ try renderExpression(allocator, stream, tree, indent, range.start);
+ try stream.write("..");
+ if (range.end) |end| {
+ try renderExpression(allocator, stream, tree, indent, end);
}
-
- try stack.append(RenderState { .Text = "|"});
+ try stream.write("]");
},
- ast.Node.Id.PointerIndexPayload => {
- const payload = @fieldParentPtr(ast.Node.PointerIndexPayload, "base", base);
- try stack.append(RenderState { .Text = "|"});
- if (payload.index_symbol) |index_symbol| {
- try stack.append(RenderState { .Expression = index_symbol });
- try stack.append(RenderState { .Text = ", "});
+ ast.Node.SuffixOp.Op.StructInitializer => |*field_inits| {
+ if (field_inits.len == 0) {
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("{}");
+ return;
}
- try stack.append(RenderState { .Expression = payload.value_symbol });
+ if (field_inits.len == 1) {
+ const field_init = *field_inits.at(0);
- if (payload.ptr_token) |ptr_token| {
- try stack.append(RenderState { .Text = tree.tokenSlice(ptr_token) });
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("{ ");
+ try renderExpression(allocator, stream, tree, indent, field_init);
+ try stream.write(" }");
+ return;
}
- try stack.append(RenderState { .Text = "|"});
- },
- ast.Node.Id.GroupedExpression => {
- const grouped_expr = @fieldParentPtr(ast.Node.GroupedExpression, "base", base);
- try stack.append(RenderState { .Text = ")"});
- try stack.append(RenderState { .Expression = grouped_expr.expr });
- try stack.append(RenderState { .Text = "("});
- },
- ast.Node.Id.FieldInitializer => {
- const field_init = @fieldParentPtr(ast.Node.FieldInitializer, "base", base);
- try stream.print(".{} = ", tree.tokenSlice(field_init.name_token));
- try stack.append(RenderState { .Expression = field_init.expr });
- },
- ast.Node.Id.IntegerLiteral => {
- const integer_literal = @fieldParentPtr(ast.Node.IntegerLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(integer_literal.token));
- },
- ast.Node.Id.FloatLiteral => {
- const float_literal = @fieldParentPtr(ast.Node.FloatLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(float_literal.token));
- },
- ast.Node.Id.StringLiteral => {
- const string_literal = @fieldParentPtr(ast.Node.StringLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(string_literal.token));
- },
- ast.Node.Id.CharLiteral => {
- const char_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(char_literal.token));
- },
- ast.Node.Id.BoolLiteral => {
- const bool_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(bool_literal.token));
- },
- ast.Node.Id.NullLiteral => {
- const null_literal = @fieldParentPtr(ast.Node.NullLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(null_literal.token));
- },
- ast.Node.Id.ThisLiteral => {
- const this_literal = @fieldParentPtr(ast.Node.ThisLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(this_literal.token));
- },
- ast.Node.Id.Unreachable => {
- const unreachable_node = @fieldParentPtr(ast.Node.Unreachable, "base", base);
- try stream.print("{}", tree.tokenSlice(unreachable_node.token));
- },
- ast.Node.Id.ErrorType => {
- const error_type = @fieldParentPtr(ast.Node.ErrorType, "base", base);
- try stream.print("{}", tree.tokenSlice(error_type.token));
- },
- ast.Node.Id.VarType => {
- const var_type = @fieldParentPtr(ast.Node.VarType, "base", base);
- try stream.print("{}", tree.tokenSlice(var_type.token));
- },
- ast.Node.Id.ContainerDecl => {
- const container_decl = @fieldParentPtr(ast.Node.ContainerDecl, "base", base);
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("{\n");
- switch (container_decl.layout) {
- ast.Node.ContainerDecl.Layout.Packed => try stream.print("packed "),
- ast.Node.ContainerDecl.Layout.Extern => try stream.print("extern "),
- ast.Node.ContainerDecl.Layout.Auto => { },
- }
+ const new_indent = indent + indent_delta;
- switch (container_decl.kind) {
- ast.Node.ContainerDecl.Kind.Struct => try stream.print("struct"),
- ast.Node.ContainerDecl.Kind.Enum => try stream.print("enum"),
- ast.Node.ContainerDecl.Kind.Union => try stream.print("union"),
- }
-
- if (container_decl.fields_and_decls.len == 0) {
- try stack.append(RenderState { .Text = "{}"});
- } else {
- try stack.append(RenderState { .Text = "}"});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Text = "\n"});
-
- var i = container_decl.fields_and_decls.len;
- while (i != 0) {
- i -= 1;
- const node = *container_decl.fields_and_decls.at(i);
- try stack.append(RenderState { .TopLevelDecl = node});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState {
- .Text = blk: {
- if (i != 0) {
- const prev_node = *container_decl.fields_and_decls.at(i - 1);
- const prev_node_last_token_end = tree.tokens.at(prev_node.lastToken()).end;
- const loc = tree.tokenLocation(prev_node_last_token_end, node.firstToken());
- if (loc.line >= 2) {
- break :blk "\n\n";
- }
- }
- break :blk "\n";
- },
- });
+ var it = field_inits.iterator(0);
+ while (it.next()) |field_init| {
+ try stream.writeByteNTimes(' ', new_indent);
+ try renderExpression(allocator, stream, tree, new_indent, *field_init);
+ if ((*field_init).id != ast.Node.Id.LineComment) {
+ try stream.write(",");
+ }
+ if (it.peek()) |next_field_init| {
+ const n = if (nodeLineOffset(tree, *field_init, *next_field_init) >= 2) u8(2) else u8(1);
+ try stream.writeByteNTimes('\n', n);
}
- try stack.append(RenderState { .Indent = indent + indent_delta});
- try stack.append(RenderState { .Text = "{"});
}
- switch (container_decl.init_arg_expr) {
- ast.Node.ContainerDecl.InitArg.None => try stack.append(RenderState { .Text = " "}),
- ast.Node.ContainerDecl.InitArg.Enum => |enum_tag_type| {
- if (enum_tag_type) |expr| {
- try stack.append(RenderState { .Text = ")) "});
- try stack.append(RenderState { .Expression = expr});
- try stack.append(RenderState { .Text = "(enum("});
- } else {
- try stack.append(RenderState { .Text = "(enum) "});
- }
- },
- ast.Node.ContainerDecl.InitArg.Type => |type_expr| {
- try stack.append(RenderState { .Text = ") "});
- try stack.append(RenderState { .Expression = type_expr});
- try stack.append(RenderState { .Text = "("});
- },
- }
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ try stream.write("}");
},
- ast.Node.Id.ErrorSetDecl => {
- const err_set_decl = @fieldParentPtr(ast.Node.ErrorSetDecl, "base", base);
- if (err_set_decl.decls.len == 0) {
- try stream.write("error{}");
- continue;
+ ast.Node.SuffixOp.Op.ArrayInitializer => |*exprs| {
+
+ if (exprs.len == 0) {
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("{}");
+ return;
+ }
+ if (exprs.len == 1) {
+ const expr = *exprs.at(0);
+
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
+ try stream.write("{");
+ try renderExpression(allocator, stream, tree, indent, expr);
+ try stream.write("}");
+ return;
}
- if (err_set_decl.decls.len == 1) blk: {
- const node = *err_set_decl.decls.at(0);
+ try renderExpression(allocator, stream, tree, indent, suffix_op.lhs);
- // if there are any doc comments or same line comments
- // don't try to put it all on one line
- if (node.cast(ast.Node.ErrorTag)) |tag| {
- if (tag.doc_comments != null) break :blk;
- } else {
- break :blk;
- }
+ const new_indent = indent + indent_delta;
+ try stream.write("{\n");
+ var it = exprs.iterator(0);
+ while (it.next()) |expr| {
+ try stream.writeByteNTimes(' ', new_indent);
+ try renderExpression(allocator, stream, tree, new_indent, *expr);
+ try stream.write(",");
- try stream.write("error{");
- try stack.append(RenderState { .Text = "}" });
- try stack.append(RenderState { .TopLevelDecl = node });
- continue;
+ if (it.peek()) |next_expr| {
+ const n = if (nodeLineOffset(tree, *expr, *next_expr) >= 2) u8(2) else u8(1);
+ try stream.writeByteNTimes('\n', n);
+ }
}
- try stream.write("error{");
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ try stream.write("}");
+ },
+ }
+ },
- try stack.append(RenderState { .Text = "}"});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Text = "\n"});
+ ast.Node.Id.ControlFlowExpression => {
+ const flow_expr = @fieldParentPtr(ast.Node.ControlFlowExpression, "base", base);
- var i = err_set_decl.decls.len;
- while (i != 0) {
- i -= 1;
- const node = *err_set_decl.decls.at(i);
- if (node.id != ast.Node.Id.LineComment) {
- try stack.append(RenderState { .Text = "," });
- }
- try stack.append(RenderState { .TopLevelDecl = node });
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState {
- .Text = blk: {
- if (i != 0) {
- const prev_node = *err_set_decl.decls.at(i - 1);
- const prev_node_last_token_end = tree.tokens.at(prev_node.lastToken()).end;
- const loc = tree.tokenLocation(prev_node_last_token_end, node.firstToken());
- if (loc.line >= 2) {
- break :blk "\n\n";
- }
- }
- break :blk "\n";
- },
- });
+ switch (flow_expr.kind) {
+ ast.Node.ControlFlowExpression.Kind.Break => |maybe_label| {
+ try stream.print("break");
+ if (maybe_label) |label| {
+ try stream.print(" :");
+ try renderExpression(allocator, stream, tree, indent, label);
}
- try stack.append(RenderState { .Indent = indent + indent_delta});
},
- ast.Node.Id.MultilineStringLiteral => {
- const multiline_str_literal = @fieldParentPtr(ast.Node.MultilineStringLiteral, "base", base);
- try stream.print("\n");
-
- var i : usize = 0;
- while (i < multiline_str_literal.lines.len) : (i += 1) {
- const t = *multiline_str_literal.lines.at(i);
- try stream.writeByteNTimes(' ', indent + indent_delta);
- try stream.print("{}", tree.tokenSlice(t));
+ ast.Node.ControlFlowExpression.Kind.Continue => |maybe_label| {
+ try stream.print("continue");
+ if (maybe_label) |label| {
+ try stream.print(" :");
+ try renderExpression(allocator, stream, tree, indent, label);
}
- try stream.writeByteNTimes(' ', indent);
- },
- ast.Node.Id.UndefinedLiteral => {
- const undefined_literal = @fieldParentPtr(ast.Node.UndefinedLiteral, "base", base);
- try stream.print("{}", tree.tokenSlice(undefined_literal.token));
},
- ast.Node.Id.BuiltinCall => {
- const builtin_call = @fieldParentPtr(ast.Node.BuiltinCall, "base", base);
- try stream.print("{}(", tree.tokenSlice(builtin_call.builtin_token));
- try stack.append(RenderState { .Text = ")"});
- var i = builtin_call.params.len;
- while (i != 0) {
- i -= 1;
- const param_node = *builtin_call.params.at(i);
- try stack.append(RenderState { .Expression = param_node});
- if (i != 0) {
- try stack.append(RenderState { .Text = ", " });
- }
- }
+ ast.Node.ControlFlowExpression.Kind.Return => {
+ try stream.print("return");
},
- ast.Node.Id.FnProto => {
- const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", base);
-
- switch (fn_proto.return_type) {
- ast.Node.FnProto.ReturnType.Explicit => |node| {
- try stack.append(RenderState { .Expression = node});
- },
- ast.Node.FnProto.ReturnType.InferErrorSet => |node| {
- try stack.append(RenderState { .Expression = node});
- try stack.append(RenderState { .Text = "!"});
- },
- }
- if (fn_proto.align_expr) |align_expr| {
- try stack.append(RenderState { .Text = ") " });
- try stack.append(RenderState { .Expression = align_expr});
- try stack.append(RenderState { .Text = "align(" });
- }
+ }
- try stack.append(RenderState { .Text = ") " });
- var i = fn_proto.params.len;
- while (i != 0) {
- i -= 1;
- const param_decl_node = *fn_proto.params.at(i);
- try stack.append(RenderState { .ParamDecl = param_decl_node});
- if (i != 0) {
- try stack.append(RenderState { .Text = ", " });
- }
- }
+ if (flow_expr.rhs) |rhs| {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, rhs);
+ }
+ },
- try stack.append(RenderState { .Text = "(" });
- if (fn_proto.name_token) |name_token| {
- try stack.append(RenderState { .Text = tree.tokenSlice(name_token) });
- try stack.append(RenderState { .Text = " " });
- }
+ ast.Node.Id.Payload => {
+ const payload = @fieldParentPtr(ast.Node.Payload, "base", base);
- try stack.append(RenderState { .Text = "fn" });
+ try stream.write("|");
+ try renderExpression(allocator, stream, tree, indent, payload.error_symbol);
+ try stream.write("|");
+ },
- if (fn_proto.async_attr) |async_attr| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = &async_attr.base });
- }
+ ast.Node.Id.PointerPayload => {
+ const payload = @fieldParentPtr(ast.Node.PointerPayload, "base", base);
- if (fn_proto.cc_token) |cc_token| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(cc_token) });
- }
+ try stream.write("|");
+ if (payload.ptr_token) |ptr_token| {
+ try stream.write(tree.tokenSlice(ptr_token));
+ }
+ try renderExpression(allocator, stream, tree, indent, payload.value_symbol);
+ try stream.write("|");
+ },
- if (fn_proto.lib_name) |lib_name| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = lib_name });
- }
- if (fn_proto.extern_export_inline_token) |extern_export_inline_token| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(extern_export_inline_token) });
- }
+ ast.Node.Id.PointerIndexPayload => {
+ const payload = @fieldParentPtr(ast.Node.PointerIndexPayload, "base", base);
- if (fn_proto.visib_token) |visib_token_index| {
- const visib_token = tree.tokens.at(visib_token_index);
- assert(visib_token.id == Token.Id.Keyword_pub or visib_token.id == Token.Id.Keyword_export);
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(visib_token_index) });
- }
- },
- ast.Node.Id.PromiseType => {
- const promise_type = @fieldParentPtr(ast.Node.PromiseType, "base", base);
- try stream.write(tree.tokenSlice(promise_type.promise_token));
- if (promise_type.result) |result| {
- try stream.write(tree.tokenSlice(result.arrow_token));
- try stack.append(RenderState { .Expression = result.return_type});
+ try stream.write("|");
+ if (payload.ptr_token) |ptr_token| {
+ try stream.write(tree.tokenSlice(ptr_token));
+ }
+ try renderExpression(allocator, stream, tree, indent, payload.value_symbol);
+
+ if (payload.index_symbol) |index_symbol| {
+ try stream.write(", ");
+ try renderExpression(allocator, stream, tree, indent, index_symbol);
+ }
+
+ try stream.write("|");
+ },
+
+ ast.Node.Id.GroupedExpression => {
+ const grouped_expr = @fieldParentPtr(ast.Node.GroupedExpression, "base", base);
+
+ try stream.write("(");
+ try renderExpression(allocator, stream, tree, indent, grouped_expr.expr);
+ try stream.write(")");
+ },
+
+ ast.Node.Id.FieldInitializer => {
+ const field_init = @fieldParentPtr(ast.Node.FieldInitializer, "base", base);
+
+ try stream.print(".{} = ", tree.tokenSlice(field_init.name_token));
+ try renderExpression(allocator, stream, tree, indent, field_init.expr);
+ },
+
+ ast.Node.Id.IntegerLiteral => {
+ const integer_literal = @fieldParentPtr(ast.Node.IntegerLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(integer_literal.token));
+ },
+ ast.Node.Id.FloatLiteral => {
+ const float_literal = @fieldParentPtr(ast.Node.FloatLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(float_literal.token));
+ },
+ ast.Node.Id.StringLiteral => {
+ const string_literal = @fieldParentPtr(ast.Node.StringLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(string_literal.token));
+ },
+ ast.Node.Id.CharLiteral => {
+ const char_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(char_literal.token));
+ },
+ ast.Node.Id.BoolLiteral => {
+ const bool_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(bool_literal.token));
+ },
+ ast.Node.Id.NullLiteral => {
+ const null_literal = @fieldParentPtr(ast.Node.NullLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(null_literal.token));
+ },
+ ast.Node.Id.ThisLiteral => {
+ const this_literal = @fieldParentPtr(ast.Node.ThisLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(this_literal.token));
+ },
+ ast.Node.Id.Unreachable => {
+ const unreachable_node = @fieldParentPtr(ast.Node.Unreachable, "base", base);
+ try stream.print("{}", tree.tokenSlice(unreachable_node.token));
+ },
+ ast.Node.Id.ErrorType => {
+ const error_type = @fieldParentPtr(ast.Node.ErrorType, "base", base);
+ try stream.print("{}", tree.tokenSlice(error_type.token));
+ },
+ ast.Node.Id.VarType => {
+ const var_type = @fieldParentPtr(ast.Node.VarType, "base", base);
+ try stream.print("{}", tree.tokenSlice(var_type.token));
+ },
+ ast.Node.Id.ContainerDecl => {
+ const container_decl = @fieldParentPtr(ast.Node.ContainerDecl, "base", base);
+
+ switch (container_decl.layout) {
+ ast.Node.ContainerDecl.Layout.Packed => try stream.print("packed "),
+ ast.Node.ContainerDecl.Layout.Extern => try stream.print("extern "),
+ ast.Node.ContainerDecl.Layout.Auto => { },
+ }
+
+ switch (container_decl.kind) {
+ ast.Node.ContainerDecl.Kind.Struct => try stream.print("struct"),
+ ast.Node.ContainerDecl.Kind.Enum => try stream.print("enum"),
+ ast.Node.ContainerDecl.Kind.Union => try stream.print("union"),
+ }
+
+ switch (container_decl.init_arg_expr) {
+ ast.Node.ContainerDecl.InitArg.None => try stream.write(" "),
+ ast.Node.ContainerDecl.InitArg.Enum => |enum_tag_type| {
+ if (enum_tag_type) |expr| {
+ try stream.write("(enum(");
+ try renderExpression(allocator, stream, tree, indent, expr);
+ try stream.write(")) ");
+ } else {
+ try stream.write("(enum) ");
}
},
- ast.Node.Id.LineComment => {
- const line_comment_node = @fieldParentPtr(ast.Node.LineComment, "base", base);
- try stream.write(tree.tokenSlice(line_comment_node.token));
+ ast.Node.ContainerDecl.InitArg.Type => |type_expr| {
+ try stream.write("(");
+ try renderExpression(allocator, stream, tree, indent, type_expr);
+ try stream.write(") ");
},
- ast.Node.Id.DocComment => unreachable, // doc comments are attached to nodes
- ast.Node.Id.Switch => {
- const switch_node = @fieldParentPtr(ast.Node.Switch, "base", base);
+ }
- try stream.print("{} (", tree.tokenSlice(switch_node.switch_token));
+ if (container_decl.fields_and_decls.len == 0) {
+ try stream.write("{}");
+ } else {
+ try stream.write("{\n");
+ const new_indent = indent + indent_delta;
- if (switch_node.cases.len == 0) {
- try stack.append(RenderState { .Text = ") {}"});
- try stack.append(RenderState { .Expression = switch_node.expr });
- continue;
- }
+ var it = container_decl.fields_and_decls.iterator(0);
+ while (it.next()) |decl| {
+ try stream.writeByteNTimes(' ', new_indent);
+ try renderTopLevelDecl(allocator, stream, tree, new_indent, *decl);
- try stack.append(RenderState { .Text = "}"});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Text = "\n"});
-
- var i = switch_node.cases.len;
- while (i != 0) {
- i -= 1;
- const node = *switch_node.cases.at(i);
- try stack.append(RenderState { .Expression = node});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState {
- .Text = blk: {
- if (i != 0) {
- const prev_node = *switch_node.cases.at(i - 1);
- const prev_node_last_token_end = tree.tokens.at(prev_node.lastToken()).end;
- const loc = tree.tokenLocation(prev_node_last_token_end, node.firstToken());
- if (loc.line >= 2) {
- break :blk "\n\n";
- }
- }
- break :blk "\n";
- },
- });
+ if (it.peek()) |next_decl| {
+ const n = if (nodeLineOffset(tree, *decl, *next_decl) >= 2) u8(2) else u8(1);
+ try stream.writeByteNTimes('\n', n);
}
- try stack.append(RenderState { .Indent = indent + indent_delta});
- try stack.append(RenderState { .Text = ") {"});
- try stack.append(RenderState { .Expression = switch_node.expr });
- },
- ast.Node.Id.SwitchCase => {
- const switch_case = @fieldParentPtr(ast.Node.SwitchCase, "base", base);
-
- try stack.append(RenderState { .Token = switch_case.lastToken() + 1 });
- try stack.append(RenderState { .Expression = switch_case.expr });
- if (switch_case.payload) |payload| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = payload });
- }
- try stack.append(RenderState { .Text = " => "});
+ }
- var i = switch_case.items.len;
- while (i != 0) {
- i -= 1;
- try stack.append(RenderState { .Expression = *switch_case.items.at(i) });
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ try stream.write("}");
+ }
+ },
- if (i != 0) {
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Text = ",\n" });
- }
- }
+ ast.Node.Id.ErrorSetDecl => {
+ const err_set_decl = @fieldParentPtr(ast.Node.ErrorSetDecl, "base", base);
+
+ if (err_set_decl.decls.len == 0) {
+ try stream.write("error{}");
+ return;
+ }
+
+ if (err_set_decl.decls.len == 1) blk: {
+ const node = *err_set_decl.decls.at(0);
+
+ // if there are any doc comments or same line comments
+ // don't try to put it all on one line
+ if (node.cast(ast.Node.ErrorTag)) |tag| {
+ if (tag.doc_comments != null) break :blk;
+ } else {
+ break :blk;
+ }
+
+
+ try stream.write("error{");
+ try renderTopLevelDecl(allocator, stream, tree, indent, node);
+ try stream.write("}");
+ return;
+ }
+
+ try stream.write("error{\n");
+ const new_indent = indent + indent_delta;
+
+ var it = err_set_decl.decls.iterator(0);
+ while (it.next()) |node| {
+ try stream.writeByteNTimes(' ', new_indent);
+ try renderTopLevelDecl(allocator, stream, tree, new_indent, *node);
+ if ((*node).id != ast.Node.Id.LineComment) {
+ try stream.write(",");
+ }
+ if (it.peek()) |next_node| {
+ const n = if (nodeLineOffset(tree, *node, *next_node) >= 2) u8(2) else u8(1);
+ try stream.writeByteNTimes('\n', n);
+ }
+ }
+
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ try stream.write("}");
+ },
+
+ ast.Node.Id.MultilineStringLiteral => {
+ const multiline_str_literal = @fieldParentPtr(ast.Node.MultilineStringLiteral, "base", base);
+ try stream.print("\n");
+
+ var i : usize = 0;
+ while (i < multiline_str_literal.lines.len) : (i += 1) {
+ const t = *multiline_str_literal.lines.at(i);
+ try stream.writeByteNTimes(' ', indent + indent_delta);
+ try stream.print("{}", tree.tokenSlice(t));
+ }
+ try stream.writeByteNTimes(' ', indent);
+ },
+ ast.Node.Id.UndefinedLiteral => {
+ const undefined_literal = @fieldParentPtr(ast.Node.UndefinedLiteral, "base", base);
+ try stream.print("{}", tree.tokenSlice(undefined_literal.token));
+ },
+
+ ast.Node.Id.BuiltinCall => {
+ const builtin_call = @fieldParentPtr(ast.Node.BuiltinCall, "base", base);
+ try stream.print("{}(", tree.tokenSlice(builtin_call.builtin_token));
+
+ var it = builtin_call.params.iterator(0);
+ while (it.next()) |param_node| {
+ try renderExpression(allocator, stream, tree, indent, *param_node);
+ if (it.peek() != null) {
+ try stream.write(", ");
+ }
+ }
+ try stream.write(")");
+ },
+
+ ast.Node.Id.FnProto => {
+ const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", base);
+
+ if (fn_proto.visib_token) |visib_token_index| {
+ const visib_token = tree.tokens.at(visib_token_index);
+ assert(visib_token.id == Token.Id.Keyword_pub or visib_token.id == Token.Id.Keyword_export);
+ try stream.print("{} ", tree.tokenSlice(visib_token_index));
+ }
+
+ if (fn_proto.extern_export_inline_token) |extern_export_inline_token| {
+ try stream.print("{} ", tree.tokenSlice(extern_export_inline_token));
+ }
+
+ if (fn_proto.lib_name) |lib_name| {
+ try renderExpression(allocator, stream, tree, indent, lib_name);
+ try stream.write(" ");
+ }
+
+ if (fn_proto.cc_token) |cc_token| {
+ try stream.print("{} ", tree.tokenSlice(cc_token));
+ }
+
+ if (fn_proto.async_attr) |async_attr| {
+ try renderExpression(allocator, stream, tree, indent, &async_attr.base);
+ try stream.write(" ");
+ }
+
+ try stream.write("fn");
+
+ if (fn_proto.name_token) |name_token| {
+ try stream.print(" {}", tree.tokenSlice(name_token));
+ }
+
+ try stream.write("(");
+
+ var it = fn_proto.params.iterator(0);
+ while (it.next()) |param_decl_node| {
+ try renderParamDecl(allocator, stream, tree, indent, *param_decl_node);
+
+ if (it.peek() != null) {
+ try stream.write(", ");
+ }
+ }
+
+ try stream.write(") ");
+
+ if (fn_proto.align_expr) |align_expr| {
+ try stream.write("align(");
+ try renderExpression(allocator, stream, tree, indent, align_expr);
+ try stream.write(") ");
+ }
+
+ switch (fn_proto.return_type) {
+ ast.Node.FnProto.ReturnType.Explicit => |node| {
+ try renderExpression(allocator, stream, tree, indent, node);
},
- ast.Node.Id.SwitchElse => {
- const switch_else = @fieldParentPtr(ast.Node.SwitchElse, "base", base);
- try stream.print("{}", tree.tokenSlice(switch_else.token));
+ ast.Node.FnProto.ReturnType.InferErrorSet => |node| {
+ try stream.write("!");
+ try renderExpression(allocator, stream, tree, indent, node);
},
- ast.Node.Id.Else => {
- const else_node = @fieldParentPtr(ast.Node.Else, "base", base);
- try stream.print("{}", tree.tokenSlice(else_node.else_token));
-
- switch (else_node.body.id) {
- ast.Node.Id.Block, ast.Node.Id.If,
- ast.Node.Id.For, ast.Node.Id.While,
- ast.Node.Id.Switch => {
- try stream.print(" ");
- try stack.append(RenderState { .Expression = else_node.body });
- },
- else => {
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Expression = else_node.body });
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent + indent_delta });
- try stack.append(RenderState { .Text = "\n" });
- }
- }
+ }
- if (else_node.payload) |payload| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = payload });
- }
- },
- ast.Node.Id.While => {
- const while_node = @fieldParentPtr(ast.Node.While, "base", base);
- if (while_node.label) |label| {
- try stream.print("{}: ", tree.tokenSlice(label));
- }
+ },
- if (while_node.inline_token) |inline_token| {
- try stream.print("{} ", tree.tokenSlice(inline_token));
- }
+ ast.Node.Id.PromiseType => {
+ const promise_type = @fieldParentPtr(ast.Node.PromiseType, "base", base);
+ try stream.write(tree.tokenSlice(promise_type.promise_token));
+ if (promise_type.result) |result| {
+ try stream.write(tree.tokenSlice(result.arrow_token));
+ try renderExpression(allocator, stream, tree, indent, result.return_type);
+ }
+ },
- try stream.print("{} ", tree.tokenSlice(while_node.while_token));
+ ast.Node.Id.LineComment => {
+ const line_comment_node = @fieldParentPtr(ast.Node.LineComment, "base", base);
+ try stream.write(tree.tokenSlice(line_comment_node.token));
+ },
- if (while_node.@"else") |@"else"| {
- try stack.append(RenderState { .Expression = &@"else".base });
+ ast.Node.Id.DocComment => unreachable, // doc comments are attached to nodes
- if (while_node.body.id == ast.Node.Id.Block) {
- try stack.append(RenderState { .Text = " " });
- } else {
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Text = "\n" });
- }
- }
+ ast.Node.Id.Switch => {
+ const switch_node = @fieldParentPtr(ast.Node.Switch, "base", base);
- if (while_node.body.id == ast.Node.Id.Block) {
- try stack.append(RenderState { .Expression = while_node.body });
- try stack.append(RenderState { .Text = " " });
- } else {
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Expression = while_node.body });
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent + indent_delta });
- try stack.append(RenderState { .Text = "\n" });
- }
+ try stream.print("{} (", tree.tokenSlice(switch_node.switch_token));
+ if (switch_node.cases.len == 0) {
+ try renderExpression(allocator, stream, tree, indent, switch_node.expr);
+ try stream.write(") {}");
+ return;
+ }
- if (while_node.continue_expr) |continue_expr| {
- try stack.append(RenderState { .Text = ")" });
- try stack.append(RenderState { .Expression = continue_expr });
- try stack.append(RenderState { .Text = ": (" });
- try stack.append(RenderState { .Text = " " });
- }
+ try renderExpression(allocator, stream, tree, indent, switch_node.expr);
+ try stream.write(") {\n");
- if (while_node.payload) |payload| {
- try stack.append(RenderState { .Expression = payload });
- try stack.append(RenderState { .Text = " " });
- }
+ const new_indent = indent + indent_delta;
- try stack.append(RenderState { .Text = ")" });
- try stack.append(RenderState { .Expression = while_node.condition });
- try stack.append(RenderState { .Text = "(" });
- },
- ast.Node.Id.For => {
- const for_node = @fieldParentPtr(ast.Node.For, "base", base);
- if (for_node.label) |label| {
- try stream.print("{}: ", tree.tokenSlice(label));
- }
+ var it = switch_node.cases.iterator(0);
+ while (it.next()) |node| {
+ try stream.writeByteNTimes(' ', new_indent);
+ try renderExpression(allocator, stream, tree, new_indent, *node);
- if (for_node.inline_token) |inline_token| {
- try stream.print("{} ", tree.tokenSlice(inline_token));
- }
+ if (it.peek()) |next_node| {
+ const n = if (nodeLineOffset(tree, *node, *next_node) >= 2) u8(2) else u8(1);
+ try stream.writeByteNTimes('\n', n);
+ }
+ }
- try stream.print("{} ", tree.tokenSlice(for_node.for_token));
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ try stream.write("}");
+ },
- if (for_node.@"else") |@"else"| {
- try stack.append(RenderState { .Expression = &@"else".base });
+ ast.Node.Id.SwitchCase => {
+ const switch_case = @fieldParentPtr(ast.Node.SwitchCase, "base", base);
- if (for_node.body.id == ast.Node.Id.Block) {
- try stack.append(RenderState { .Text = " " });
- } else {
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Text = "\n" });
- }
- }
+ var it = switch_case.items.iterator(0);
+ while (it.next()) |node| {
+ try renderExpression(allocator, stream, tree, indent, *node);
- if (for_node.body.id == ast.Node.Id.Block) {
- try stack.append(RenderState { .Expression = for_node.body });
- try stack.append(RenderState { .Text = " " });
- } else {
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Expression = for_node.body });
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent + indent_delta });
- try stack.append(RenderState { .Text = "\n" });
- }
+ if (it.peek() != null) {
+ try stream.write(",\n");
+ try stream.writeByteNTimes(' ', indent);
+ }
+ }
- if (for_node.payload) |payload| {
- try stack.append(RenderState { .Expression = payload });
- try stack.append(RenderState { .Text = " " });
- }
+ try stream.write(" => ");
- try stack.append(RenderState { .Text = ")" });
- try stack.append(RenderState { .Expression = for_node.array_expr });
- try stack.append(RenderState { .Text = "(" });
- },
- ast.Node.Id.If => {
- const if_node = @fieldParentPtr(ast.Node.If, "base", base);
- try stream.print("{} ", tree.tokenSlice(if_node.if_token));
-
- switch (if_node.body.id) {
- ast.Node.Id.Block, ast.Node.Id.If,
- ast.Node.Id.For, ast.Node.Id.While,
- ast.Node.Id.Switch => {
- if (if_node.@"else") |@"else"| {
- try stack.append(RenderState { .Expression = &@"else".base });
-
- if (if_node.body.id == ast.Node.Id.Block) {
- try stack.append(RenderState { .Text = " " });
- } else {
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Text = "\n" });
- }
- }
- },
- else => {
- if (if_node.@"else") |@"else"| {
- try stack.append(RenderState { .Expression = @"else".body });
-
- if (@"else".payload) |payload| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = payload });
- }
-
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Text = tree.tokenSlice(@"else".else_token) });
- try stack.append(RenderState { .Text = " " });
- }
+ if (switch_case.payload) |payload| {
+ try renderExpression(allocator, stream, tree, indent, payload);
+ try stream.write(" ");
+ }
+
+ try renderExpression(allocator, stream, tree, indent, switch_case.expr);
+ try renderToken(tree, stream, switch_case.lastToken() + 1, indent, true);
+ },
+ ast.Node.Id.SwitchElse => {
+ const switch_else = @fieldParentPtr(ast.Node.SwitchElse, "base", base);
+ try stream.print("{}", tree.tokenSlice(switch_else.token));
+ },
+ ast.Node.Id.Else => {
+ const else_node = @fieldParentPtr(ast.Node.Else, "base", base);
+ try stream.print("{}", tree.tokenSlice(else_node.else_token));
+
+ const block_body = switch (else_node.body.id) {
+ ast.Node.Id.Block, ast.Node.Id.If,
+ ast.Node.Id.For, ast.Node.Id.While,
+ ast.Node.Id.Switch => true,
+ else => false,
+ };
+
+ if (block_body) {
+ try stream.write(" ");
+ }
+
+ if (else_node.payload) |payload| {
+ try renderExpression(allocator, stream, tree, indent, payload);
+ try stream.write(" ");
+ }
+
+ if (block_body) {
+ try renderExpression(allocator, stream, tree, indent, else_node.body);
+ } else {
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent + indent_delta);
+ try renderExpression(allocator, stream, tree, indent, else_node.body);
+ }
+ },
+
+ ast.Node.Id.While => {
+ const while_node = @fieldParentPtr(ast.Node.While, "base", base);
+
+ if (while_node.label) |label| {
+ try stream.print("{}: ", tree.tokenSlice(label));
+ }
+
+ if (while_node.inline_token) |inline_token| {
+ try stream.print("{} ", tree.tokenSlice(inline_token));
+ }
+
+ try stream.print("{} (", tree.tokenSlice(while_node.while_token));
+ try renderExpression(allocator, stream, tree, indent, while_node.condition);
+ try stream.write(")");
+
+ if (while_node.payload) |payload| {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, payload);
+ }
+
+ if (while_node.continue_expr) |continue_expr| {
+ try stream.write(" : (");
+ try renderExpression(allocator, stream, tree, indent, continue_expr);
+ try stream.write(")");
+ }
+
+ if (while_node.body.id == ast.Node.Id.Block) {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, while_node.body);
+ } else {
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent + indent_delta);
+ try renderExpression(allocator, stream, tree, indent, while_node.body);
+ }
+
+ if (while_node.@"else") |@"else"| {
+ if (while_node.body.id == ast.Node.Id.Block) {
+ try stream.write(" ");
+ } else {
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ }
+
+ try renderExpression(allocator, stream, tree, indent, &@"else".base);
+ }
+ },
+
+ ast.Node.Id.For => {
+ const for_node = @fieldParentPtr(ast.Node.For, "base", base);
+ if (for_node.label) |label| {
+ try stream.print("{}: ", tree.tokenSlice(label));
+ }
+
+ if (for_node.inline_token) |inline_token| {
+ try stream.print("{} ", tree.tokenSlice(inline_token));
+ }
+
+ try stream.print("{} (", tree.tokenSlice(for_node.for_token));
+ try renderExpression(allocator, stream, tree, indent, for_node.array_expr);
+ try stream.write(")");
+
+ if (for_node.payload) |payload| {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, payload);
+ }
+
+ if (for_node.body.id == ast.Node.Id.Block) {
+ try stream.write(" ");
+ try renderExpression(allocator, stream, tree, indent, for_node.body);
+ } else {
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent + indent_delta);
+ try renderExpression(allocator, stream, tree, indent, for_node.body);
+ }
+
+ if (for_node.@"else") |@"else"| {
+ if (for_node.body.id == ast.Node.Id.Block) {
+ try stream.write(" ");
+ } else {
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
+ }
+
+ try renderExpression(allocator, stream, tree, indent, &@"else".base);
+ }
+ },
+
+ ast.Node.Id.If => {
+ const if_node = @fieldParentPtr(ast.Node.If, "base", base);
+ try stream.print("{} (", tree.tokenSlice(if_node.if_token));
+
+ try renderExpression(allocator, stream, tree, indent, if_node.condition);
+ try renderToken(tree, stream, if_node.condition.lastToken() + 1, indent, false);
+
+ if (if_node.payload) |payload| {
+ try renderExpression(allocator, stream, tree, indent, payload);
+ try stream.write(" ");
+ }
+
+ try renderExpression(allocator, stream, tree, indent, if_node.body);
+
+ switch (if_node.body.id) {
+ ast.Node.Id.Block, ast.Node.Id.If, ast.Node.Id.For, ast.Node.Id.While, ast.Node.Id.Switch => {
+ if (if_node.@"else") |@"else"| {
+ if (if_node.body.id == ast.Node.Id.Block) {
+ try stream.write(" ");
+ } else {
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent);
}
+
+ try renderExpression(allocator, stream, tree, indent, &@"else".base);
}
+ },
+ else => {
+ if (if_node.@"else") |@"else"| {
+ try stream.print(" {} ", tree.tokenSlice(@"else".else_token));
- try stack.append(RenderState { .Expression = if_node.body });
+ if (@"else".payload) |payload| {
+ try renderExpression(allocator, stream, tree, indent, payload);
+ try stream.write(" ");
+ }
- if (if_node.payload) |payload| {
- try stack.append(RenderState { .Text = " " });
- try stack.append(RenderState { .Expression = payload });
+ try renderExpression(allocator, stream, tree, indent, @"else".body);
}
+ }
+ }
+ },
- try stack.append(RenderState { .NonBreakToken = if_node.condition.lastToken() + 1 });
- try stack.append(RenderState { .Expression = if_node.condition });
- try stack.append(RenderState { .Text = "(" });
- },
- ast.Node.Id.Asm => {
- const asm_node = @fieldParentPtr(ast.Node.Asm, "base", base);
- try stream.print("{} ", tree.tokenSlice(asm_node.asm_token));
+ ast.Node.Id.Asm => {
+ const asm_node = @fieldParentPtr(ast.Node.Asm, "base", base);
+ try stream.print("{} ", tree.tokenSlice(asm_node.asm_token));
- if (asm_node.volatile_token) |volatile_token| {
- try stream.print("{} ", tree.tokenSlice(volatile_token));
- }
+ if (asm_node.volatile_token) |volatile_token| {
+ try stream.print("{} ", tree.tokenSlice(volatile_token));
+ }
- try stack.append(RenderState { .Indent = indent });
- try stack.append(RenderState { .Text = ")" });
- {
- var i = asm_node.clobbers.len;
- while (i != 0) {
- i -= 1;
- try stack.append(RenderState { .Expression = *asm_node.clobbers.at(i) });
-
- if (i != 0) {
- try stack.append(RenderState { .Text = ", " });
- }
- }
+ try stream.print("(");
+ try renderExpression(allocator, stream, tree, indent, asm_node.template);
+ try stream.print("\n");
+ const indent_once = indent + indent_delta;
+ try stream.writeByteNTimes(' ', indent_once);
+ try stream.print(": ");
+ const indent_extra = indent_once + 2;
+
+ {
+ var it = asm_node.outputs.iterator(0);
+ while (it.next()) |asm_output| {
+ const node = &(*asm_output).base;
+ try renderExpression(allocator, stream, tree, indent_extra, node);
+
+ if (it.peek()) |next_asm_output| {
+ const next_node = &(*next_asm_output).base;
+ const n = if (nodeLineOffset(tree, node, next_node) >= 2) u8(2) else u8(1);
+ try stream.writeByte(',');
+ try stream.writeByteNTimes('\n', n);
+ try stream.writeByteNTimes(' ', indent_extra);
}
- try stack.append(RenderState { .Text = ": " });
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent + indent_delta });
- try stack.append(RenderState { .Text = "\n" });
- {
- var i = asm_node.inputs.len;
- while (i != 0) {
- i -= 1;
- const node = *asm_node.inputs.at(i);
- try stack.append(RenderState { .Expression = &node.base});
-
- if (i != 0) {
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState {
- .Text = blk: {
- const prev_node = *asm_node.inputs.at(i - 1);
- const prev_node_last_token_end = tree.tokens.at(prev_node.lastToken()).end;
- const loc = tree.tokenLocation(prev_node_last_token_end, node.firstToken());
- if (loc.line >= 2) {
- break :blk "\n\n";
- }
- break :blk "\n";
- },
- });
- try stack.append(RenderState { .Text = "," });
- }
- }
+ }
+ }
+
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent_once);
+ try stream.write(": ");
+
+ {
+ var it = asm_node.inputs.iterator(0);
+ while (it.next()) |asm_input| {
+ const node = &(*asm_input).base;
+ try renderExpression(allocator, stream, tree, indent_extra, node);
+
+ if (it.peek()) |next_asm_input| {
+ const next_node = &(*next_asm_input).base;
+ const n = if (nodeLineOffset(tree, node, next_node) >= 2) u8(2) else u8(1);
+ try stream.writeByte(',');
+ try stream.writeByteNTimes('\n', n);
+ try stream.writeByteNTimes(' ', indent_extra);
}
- try stack.append(RenderState { .Indent = indent + indent_delta + 2});
- try stack.append(RenderState { .Text = ": "});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent + indent_delta});
- try stack.append(RenderState { .Text = "\n" });
- {
- var i = asm_node.outputs.len;
- while (i != 0) {
- i -= 1;
- const node = *asm_node.outputs.at(i);
- try stack.append(RenderState { .Expression = &node.base});
-
- if (i != 0) {
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState {
- .Text = blk: {
- const prev_node = *asm_node.outputs.at(i - 1);
- const prev_node_last_token_end = tree.tokens.at(prev_node.lastToken()).end;
- const loc = tree.tokenLocation(prev_node_last_token_end, node.firstToken());
- if (loc.line >= 2) {
- break :blk "\n\n";
- }
- break :blk "\n";
- },
- });
- try stack.append(RenderState { .Text = "," });
- }
- }
+ }
+ }
+
+ try stream.write("\n");
+ try stream.writeByteNTimes(' ', indent_once);
+ try stream.write(": ");
+
+ {
+ var it = asm_node.clobbers.iterator(0);
+ while (it.next()) |node| {
+ try renderExpression(allocator, stream, tree, indent_once, *node);
+
+ if (it.peek() != null) {
+ try stream.write(", ");
}
- try stack.append(RenderState { .Indent = indent + indent_delta + 2});
- try stack.append(RenderState { .Text = ": "});
- try stack.append(RenderState.PrintIndent);
- try stack.append(RenderState { .Indent = indent + indent_delta});
- try stack.append(RenderState { .Text = "\n" });
- try stack.append(RenderState { .Expression = asm_node.template });
- try stack.append(RenderState { .Text = "(" });
- },
- ast.Node.Id.AsmInput => {
- const asm_input = @fieldParentPtr(ast.Node.AsmInput, "base", base);
-
- try stack.append(RenderState { .Text = ")"});
- try stack.append(RenderState { .Expression = asm_input.expr});
- try stack.append(RenderState { .Text = " ("});
- try stack.append(RenderState { .Expression = asm_input.constraint });
- try stack.append(RenderState { .Text = "] "});
- try stack.append(RenderState { .Expression = asm_input.symbolic_name });
- try stack.append(RenderState { .Text = "["});
+ }
+ }
+
+ try stream.write(")");
+ },
+
+ ast.Node.Id.AsmInput => {
+ const asm_input = @fieldParentPtr(ast.Node.AsmInput, "base", base);
+
+ try stream.write("[");
+ try renderExpression(allocator, stream, tree, indent, asm_input.symbolic_name);
+ try stream.write("] ");
+ try renderExpression(allocator, stream, tree, indent, asm_input.constraint);
+ try stream.write(" (");
+ try renderExpression(allocator, stream, tree, indent, asm_input.expr);
+ try stream.write(")");
+ },
+
+ ast.Node.Id.AsmOutput => {
+ const asm_output = @fieldParentPtr(ast.Node.AsmOutput, "base", base);
+
+ try stream.write("[");
+ try renderExpression(allocator, stream, tree, indent, asm_output.symbolic_name);
+ try stream.write("] ");
+ try renderExpression(allocator, stream, tree, indent, asm_output.constraint);
+ try stream.write(" (");
+
+ switch (asm_output.kind) {
+ ast.Node.AsmOutput.Kind.Variable => |variable_name| {
+ try renderExpression(allocator, stream, tree, indent, &variable_name.base);
},
- ast.Node.Id.AsmOutput => {
- const asm_output = @fieldParentPtr(ast.Node.AsmOutput, "base", base);
-
- try stack.append(RenderState { .Text = ")"});
- switch (asm_output.kind) {
- ast.Node.AsmOutput.Kind.Variable => |variable_name| {
- try stack.append(RenderState { .Expression = &variable_name.base});
- },
- ast.Node.AsmOutput.Kind.Return => |return_type| {
- try stack.append(RenderState { .Expression = return_type});
- try stack.append(RenderState { .Text = "-> "});
- },
- }
- try stack.append(RenderState { .Text = " ("});
- try stack.append(RenderState { .Expression = asm_output.constraint });
- try stack.append(RenderState { .Text = "] "});
- try stack.append(RenderState { .Expression = asm_output.symbolic_name });
- try stack.append(RenderState { .Text = "["});
+ ast.Node.AsmOutput.Kind.Return => |return_type| {
+ try stream.write("-> ");
+ try renderExpression(allocator, stream, tree, indent, return_type);
},
+ }
- ast.Node.Id.StructField,
- ast.Node.Id.UnionTag,
- ast.Node.Id.EnumTag,
- ast.Node.Id.ErrorTag,
- ast.Node.Id.Root,
- ast.Node.Id.VarDecl,
- ast.Node.Id.Use,
- ast.Node.Id.TestDecl,
- ast.Node.Id.ParamDecl => unreachable,
- },
- RenderState.Statement => |base| {
- switch (base.id) {
- ast.Node.Id.VarDecl => {
- const var_decl = @fieldParentPtr(ast.Node.VarDecl, "base", base);
- try stack.append(RenderState { .VarDecl = var_decl});
- },
- else => {
- try stack.append(RenderState { .MaybeSemiColon = base });
- try stack.append(RenderState { .Expression = base });
- },
- }
- },
- RenderState.Indent => |new_indent| indent = new_indent,
- RenderState.PrintIndent => try stream.writeByteNTimes(' ', indent),
- RenderState.Token => |token_index| try renderToken(tree, stream, token_index, indent, true),
- RenderState.NonBreakToken => |token_index| try renderToken(tree, stream, token_index, indent, false),
- RenderState.MaybeSemiColon => |base| {
- if (base.requireSemiColon()) {
- const semicolon_index = base.lastToken() + 1;
- assert(tree.tokens.at(semicolon_index).id == Token.Id.Semicolon);
- try renderToken(tree, stream, semicolon_index, indent, true);
- }
- },
+ try stream.write(")");
+ },
+
+ ast.Node.Id.StructField,
+ ast.Node.Id.UnionTag,
+ ast.Node.Id.EnumTag,
+ ast.Node.Id.ErrorTag,
+ ast.Node.Id.Root,
+ ast.Node.Id.VarDecl,
+ ast.Node.Id.Use,
+ ast.Node.Id.TestDecl,
+ ast.Node.Id.ParamDecl => unreachable,
+ }
+}
+
+fn renderVarDecl(allocator: &mem.Allocator, stream: var, tree: &ast.Tree, indent: usize, var_decl: &ast.Node.VarDecl) (@typeOf(stream).Child.Error || Error)!void {
+ if (var_decl.visib_token) |visib_token| {
+ try stream.print("{} ", tree.tokenSlice(visib_token));
+ }
+
+ if (var_decl.extern_export_token) |extern_export_token| {
+ try stream.print("{} ", tree.tokenSlice(extern_export_token));
+
+ if (var_decl.lib_name) |lib_name| {
+ try renderExpression(allocator, stream, tree, indent, lib_name);
+ try stream.write(" ");
}
}
+
+ if (var_decl.comptime_token) |comptime_token| {
+ try stream.print("{} ", tree.tokenSlice(comptime_token));
+ }
+
+ try stream.print("{} {}", tree.tokenSlice(var_decl.mut_token), tree.tokenSlice(var_decl.name_token));
+
+ if (var_decl.type_node) |type_node| {
+ try stream.write(": ");
+ try renderExpression(allocator, stream, tree, indent, type_node);
+ }
+
+ if (var_decl.align_node) |align_node| {
+ try stream.write(" align(");
+ try renderExpression(allocator, stream, tree, indent, align_node);
+ try stream.write(")");
+ }
+
+ if (var_decl.init_node) |init_node| {
+ const text = if (init_node.id == ast.Node.Id.MultilineStringLiteral) " =" else " = ";
+ try stream.write(text);
+ try renderExpression(allocator, stream, tree, indent, init_node);
+ }
+
+ try renderToken(tree, stream, var_decl.semicolon_token, indent, true);
+}
+
+fn maybeRenderSemicolon(stream: var, tree: &ast.Tree, indent: usize, base: &ast.Node) (@typeOf(stream).Child.Error || Error)!void {
+ if (base.requireSemiColon()) {
+ const semicolon_index = base.lastToken() + 1;
+ assert(tree.tokens.at(semicolon_index).id == Token.Id.Semicolon);
+ try renderToken(tree, stream, semicolon_index, indent, true);
+ }
+}
+
+fn renderParamDecl(allocator: &mem.Allocator, stream: var, tree: &ast.Tree, indent: usize, base: &ast.Node) (@typeOf(stream).Child.Error || Error)!void {
+ const param_decl = @fieldParentPtr(ast.Node.ParamDecl, "base", base);
+ if (param_decl.comptime_token) |comptime_token| {
+ try stream.print("{} ", tree.tokenSlice(comptime_token));
+ }
+ if (param_decl.noalias_token) |noalias_token| {
+ try stream.print("{} ", tree.tokenSlice(noalias_token));
+ }
+ if (param_decl.name_token) |name_token| {
+ try stream.print("{}: ", tree.tokenSlice(name_token));
+ }
+ if (param_decl.var_args_token) |var_args_token| {
+ try stream.print("{}", tree.tokenSlice(var_args_token));
+ } else {
+ try renderExpression(allocator, stream, tree, indent, param_decl.type_node);
+ }
+}
+
+fn renderStatement(allocator: &mem.Allocator, stream: var, tree: &ast.Tree, indent: usize, base: &ast.Node) (@typeOf(stream).Child.Error || Error)!void {
+ switch (base.id) {
+ ast.Node.Id.VarDecl => {
+ const var_decl = @fieldParentPtr(ast.Node.VarDecl, "base", base);
+ try renderVarDecl(allocator, stream, tree, indent, var_decl);
+ },
+ else => {
+ try renderExpression(allocator, stream, tree, indent, base);
+ try maybeRenderSemicolon(stream, tree, indent, base);
+ },
+ }
}
-fn renderToken(tree: &ast.Tree, stream: var, token_index: ast.TokenIndex, indent: usize, line_break: bool) !void {
+fn renderToken(tree: &ast.Tree, stream: var, token_index: ast.TokenIndex, indent: usize, line_break: bool) (@typeOf(stream).Child.Error || Error)!void {
const token = tree.tokens.at(token_index);
try stream.write(tree.tokenSlicePtr(token));
@@ -1255,7 +1212,7 @@ fn renderToken(tree: &ast.Tree, stream: var, token_index: ast.TokenIndex, indent
}
}
-fn renderComments(tree: &ast.Tree, stream: var, node: var, indent: usize) !void {
+fn renderComments(tree: &ast.Tree, stream: var, node: var, indent: usize) (@typeOf(stream).Child.Error || Error)!void {
const comment = node.doc_comments ?? return;
var it = comment.lines.iterator(0);
while (it.next()) |line_token_index| {