Commit db3b768eab
std/meta/index.zig
@@ -21,7 +21,7 @@ pub fn tagName(v: var) []const u8 {
unreachable;
},
TypeId.Union => |info| {
- const UnionTag = if(info.tag_type) |UT| UT else @compileError("union is untagged");
+ const UnionTag = if (info.tag_type) |UT| UT else @compileError("union is untagged");
const Tag = @typeInfo(UnionTag).Enum.tag_type;
inline for (info.fields) |field| {
if (field.enum_field.?.value == @enumToInt(UnionTag(v)))
@@ -37,8 +37,7 @@ pub fn tagName(v: var) []const u8 {
unreachable;
},
- else => @compileError("expected enum, error set or union type, found '"
- ++ @typeName(T) ++ "'"),
+ else => @compileError("expected enum, error set or union type, found '" ++ @typeName(T) ++ "'"),
}
}
@@ -92,7 +91,7 @@ test "std.meta.bitCount" {
pub fn alignment(comptime T: type) u29 {
//@alignOf works on non-pointer types
- const P = if(comptime trait.is(TypeId.Pointer)(T)) T else *T;
+ const P = if (comptime trait.is(TypeId.Pointer)(T)) T else *T;
return @typeInfo(P).Pointer.alignment;
}
@@ -109,9 +108,8 @@ pub fn Child(comptime T: type) type {
TypeId.Array => |info| info.child,
TypeId.Pointer => |info| info.child,
TypeId.Optional => |info| info.child,
- TypeId.Promise => |info| if(info.child) |child| child else null,
- else => @compileError("Expected promise, pointer, optional, or array type, "
- ++ "found '" ++ @typeName(T) ++ "'"),
+ TypeId.Promise => |info| if (info.child) |child| child else null,
+ else => @compileError("Expected promise, pointer, optional, or array type, " ++ "found '" ++ @typeName(T) ++ "'"),
};
}
@@ -128,8 +126,7 @@ pub fn containerLayout(comptime T: type) TypeInfo.ContainerLayout {
TypeId.Struct => |info| info.layout,
TypeId.Enum => |info| info.layout,
TypeId.Union => |info| info.layout,
- else => @compileError("Expected struct, enum or union type, found '"
- ++ @typeName(T) ++ "'"),
+ else => @compileError("Expected struct, enum or union type, found '" ++ @typeName(T) ++ "'"),
};
}
@@ -172,8 +169,7 @@ pub fn definitions(comptime T: type) []TypeInfo.Definition {
TypeId.Struct => |info| info.defs,
TypeId.Enum => |info| info.defs,
TypeId.Union => |info| info.defs,
- else => @compileError("Expected struct, enum or union type, found '"
- ++ @typeName(T) ++ "'"),
+ else => @compileError("Expected struct, enum or union type, found '" ++ @typeName(T) ++ "'"),
};
}
@@ -245,16 +241,14 @@ pub fn fields(comptime T: type) switch (@typeInfo(T)) {
TypeId.Union => []TypeInfo.UnionField,
TypeId.ErrorSet => []TypeInfo.Error,
TypeId.Enum => []TypeInfo.EnumField,
- else => @compileError("Expected struct, union, error set or enum type, found '"
- ++ @typeName(T) ++ "'"),
+ else => @compileError("Expected struct, union, error set or enum type, found '" ++ @typeName(T) ++ "'"),
} {
return switch (@typeInfo(T)) {
TypeId.Struct => |info| info.fields,
TypeId.Union => |info| info.fields,
TypeId.Enum => |info| info.fields,
TypeId.ErrorSet => |info| info.errors,
- else => @compileError("Expected struct, union, error set or enum type, found '"
- ++ @typeName(T) ++ "'"),
+ else => @compileError("Expected struct, union, error set or enum type, found '" ++ @typeName(T) ++ "'"),
};
}
@@ -292,8 +286,7 @@ pub fn fieldInfo(comptime T: type, comptime field_name: []const u8) switch (@typ
TypeId.Union => TypeInfo.UnionField,
TypeId.ErrorSet => TypeInfo.Error,
TypeId.Enum => TypeInfo.EnumField,
- else => @compileError("Expected struct, union, error set or enum type, found '"
- ++ @typeName(T) ++ "'"),
+ else => @compileError("Expected struct, union, error set or enum type, found '" ++ @typeName(T) ++ "'"),
} {
inline for (comptime fields(T)) |field| {
if (comptime mem.eql(u8, field.name, field_name))
@@ -331,7 +324,7 @@ test "std.meta.fieldInfo" {
pub fn TagType(comptime T: type) type {
return switch (@typeInfo(T)) {
TypeId.Enum => |info| info.tag_type,
- TypeId.Union => |info| if(info.tag_type) |Tag| Tag else null,
+ TypeId.Union => |info| if (info.tag_type) |Tag| Tag else null,
else => @compileError("expected enum or union type, found '" ++ @typeName(T) ++ "'"),
};
}
@@ -350,104 +343,80 @@ test "std.meta.TagType" {
debug.assert(TagType(U) == E);
}
-
-
///Returns the active tag of a tagged union
-pub fn activeTag(u: var) @TagType(@typeOf(u))
-{
+pub fn activeTag(u: var) @TagType(@typeOf(u)) {
const T = @typeOf(u);
return @TagType(T)(u);
}
-test "std.meta.activeTag"
-{
- const UE = enum.
- {
+test "std.meta.activeTag" {
+ const UE = enum.{
Int,
Float,
};
-
- const U = union(UE).
- {
+
+ const U = union(UE).{
Int: u32,
Float: f32,
};
-
- var u = U.{ .Int = 32, };
+
+ var u = U.{ .Int = 32 };
debug.assert(activeTag(u) == UE.Int);
-
- u = U.{ .Float = 112.9876, };
- debug.assert(activeTag(u) == UE.Float);
+ u = U.{ .Float = 112.9876 };
+ debug.assert(activeTag(u) == UE.Float);
}
///Compares two of any type for equality. Containers are compared on a field-by-field basis,
/// where possible. Pointers are not followed.
-pub fn eql(a: var, b: @typeOf(a)) bool
-{
+pub fn eql(a: var, b: @typeOf(a)) bool {
const T = @typeOf(a);
-
- switch(@typeId(T))
- {
- builtin.TypeId.Struct =>
- {
+
+ switch (@typeId(T)) {
+ builtin.TypeId.Struct => {
const info = @typeInfo(T).Struct;
-
- inline for(info.fields) |field_info|
- {
- if(!eql(@field(a, field_info.name),
- @field(b, field_info.name))) return false;
+
+ inline for (info.fields) |field_info| {
+ if (!eql(@field(a, field_info.name), @field(b, field_info.name))) return false;
}
return true;
},
- builtin.TypeId.ErrorUnion =>
- {
- if(a) |a_p|
- {
- if(b) |b_p| return eql(a_p, b_p) else |_| return false;
- }
- else |a_e|
- {
- if(b) |_| return false else |b_e| return a_e == b_e;
+ builtin.TypeId.ErrorUnion => {
+ if (a) |a_p| {
+ if (b) |b_p| return eql(a_p, b_p) else |_| return false;
+ } else |a_e| {
+ if (b) |_| return false else |b_e| return a_e == b_e;
}
},
- builtin.TypeId.Union =>
- {
+ builtin.TypeId.Union => {
const info = @typeInfo(T).Union;
-
- if(info.tag_type) |_|
- {
+
+ if (info.tag_type) |_| {
const tag_a = activeTag(a);
const tag_b = activeTag(b);
- if(tag_a != tag_b) return false;
-
- inline for(info.fields) |field_info|
- {
+ if (tag_a != tag_b) return false;
+
+ inline for (info.fields) |field_info| {
const enum_field = field_info.enum_field.?;
- if(enum_field.value == @enumToInt(tag_a))
- {
- return eql(@field(a, enum_field.name),
- @field(b, enum_field.name));
+ if (enum_field.value == @enumToInt(tag_a)) {
+ return eql(@field(a, enum_field.name), @field(b, enum_field.name));
}
}
return false;
}
-
+
@compileError("cannot compare untagged union type " ++ @typeName(T));
},
- builtin.TypeId.Array =>
- {
- if(a.len != b.len) return false;
- for(a) |e, i| if(!eql(e, b[i])) return false;
+ builtin.TypeId.Array => {
+ if (a.len != b.len) return false;
+ for (a) |e, i|
+ if (!eql(e, b[i])) return false;
return true;
},
- builtin.TypeId.Pointer =>
- {
+ builtin.TypeId.Pointer => {
const info = @typeInfo(T).Pointer;
- switch(info.size)
- {
- builtin.TypeInfo.Pointer.Size.One,
- builtin.TypeInfo.Pointer.Size.Many => return a == b,
+ switch (info.size) {
+ builtin.TypeInfo.Pointer.Size.One, builtin.TypeInfo.Pointer.Size.Many => return a == b,
builtin.TypeInfo.Pointer.Size.Slice => return a.ptr == b.ptr and a.len == b.len,
}
},
@@ -455,71 +424,62 @@ pub fn eql(a: var, b: @typeOf(a)) bool
}
}
-
-test "std.meta.eql"
-{
- const S = struct.
- {
+test "std.meta.eql" {
+ const S = struct.{
a: u32,
b: f64,
c: [5]u8,
};
-
- const U = union(enum).
- {
+
+ const U = union(enum).{
s: S,
f: f32,
};
-
- const s_1 = S.
- {
+
+ const s_1 = S.{
.a = 134,
.b = 123.3,
.c = "12345",
};
-
- const s_2 = S.
- {
+
+ const s_2 = S.{
.a = 1,
.b = 123.3,
.c = "54321",
};
-
- const s_3 = S.
- {
+
+ const s_3 = S.{
.a = 134,
.b = 123.3,
.c = "12345",
};
-
- const u_1 = U.{ .f = 24, };
- const u_2 = U.{ .s = s_1, };
- const u_3 = U.{ .f = 24, };
-
+
+ const u_1 = U.{ .f = 24 };
+ const u_2 = U.{ .s = s_1 };
+ const u_3 = U.{ .f = 24 };
+
debug.assert(eql(s_1, s_3));
debug.assert(eql(&s_1, &s_1));
debug.assert(!eql(&s_1, &s_3));
debug.assert(eql(u_1, u_3));
debug.assert(!eql(u_1, u_2));
-
+
var a1 = "abcdef";
var a2 = "abcdef";
var a3 = "ghijkl";
-
+
debug.assert(eql(a1, a2));
debug.assert(!eql(a1, a3));
debug.assert(!eql(a1[0..], a2[0..]));
-
- const EU = struct.
- {
- fn tst(err: bool) !u8
- {
- if(err) return error.Error;
+
+ const EU = struct.{
+ fn tst(err: bool) !u8 {
+ if (err) return error.Error;
return u8(5);
}
};
-
+
debug.assert(eql(EU.tst(true), EU.tst(true)));
debug.assert(eql(EU.tst(false), EU.tst(false)));
debug.assert(!eql(EU.tst(false), EU.tst(true)));
-}
\ No newline at end of file
+}
std/meta/trait.zig
@@ -8,101 +8,80 @@ const meta = @import("index.zig");
//This is necessary if we want to return generic functions directly because of how the
// the type erasure works. see: #1375
-fn traitFnWorkaround(comptime T: type) bool
-{
+fn traitFnWorkaround(comptime T: type) bool {
return false;
}
pub const TraitFn = @typeOf(traitFnWorkaround);
-
///
//////Trait generators
//Need TraitList because compiler can't do varargs at comptime yet
pub const TraitList = []const TraitFn;
-pub fn multiTrait(comptime traits: TraitList) TraitFn
-{
- const Closure = struct.
- {
- pub fn trait(comptime T: type) bool
- {
- inline for(traits) |t| if(!t(T)) return false;
+pub fn multiTrait(comptime traits: TraitList) TraitFn {
+ const Closure = struct.{
+ pub fn trait(comptime T: type) bool {
+ inline for (traits) |t|
+ if (!t(T)) return false;
return true;
}
};
return Closure.trait;
}
-test "std.meta.trait.multiTrait"
-{
- const Vector2 = struct.
- {
+test "std.meta.trait.multiTrait" {
+ const Vector2 = struct.{
const MyType = @This();
-
+
x: u8,
y: u8,
-
- pub fn add(self: MyType, other: MyType) MyType
- {
- return MyType.
- {
+
+ pub fn add(self: MyType, other: MyType) MyType {
+ return MyType.{
.x = self.x + other.x,
.y = self.y + other.y,
};
}
};
-
- const isVector = multiTrait
- (
- TraitList.
- {
- hasFn("add"),
- hasField("x"),
- hasField("y"),
- }
- );
+
+ const isVector = multiTrait(TraitList.{
+ hasFn("add"),
+ hasField("x"),
+ hasField("y"),
+ });
debug.assert(isVector(Vector2));
debug.assert(!isVector(u8));
}
///
-
-pub fn hasDef(comptime name: []const u8) TraitFn
-{
- const Closure = struct.
- {
- pub fn trait(comptime T: type) bool
- {
+pub fn hasDef(comptime name: []const u8) TraitFn {
+ const Closure = struct.{
+ pub fn trait(comptime T: type) bool {
const info = @typeInfo(T);
- const defs = switch(info)
- {
+ const defs = switch (info) {
builtin.TypeId.Struct => |s| s.defs,
builtin.TypeId.Union => |u| u.defs,
builtin.TypeId.Enum => |e| e.defs,
else => return false,
};
- inline for(defs) |def|
- {
- if(mem.eql(u8, def.name, name)) return def.is_pub;
+ inline for (defs) |def| {
+ if (mem.eql(u8, def.name, name)) return def.is_pub;
}
-
+
return false;
}
};
return Closure.trait;
}
-test "std.meta.trait.hasDef"
-{
- const TestStruct = struct.
- {
+test "std.meta.trait.hasDef" {
+ const TestStruct = struct.{
pub const value = u8(16);
};
-
- const TestStructFail = struct.
- {
+
+ const TestStructFail = struct.{
const value = u8(16);
};
@@ -115,13 +94,10 @@ test "std.meta.trait.hasDef"
}
///
-pub fn hasFn(comptime name: []const u8) TraitFn
-{
- const Closure = struct.
- {
- pub fn trait(comptime T: type) bool
- {
- if(!comptime hasDef(name)(T)) return false;
+pub fn hasFn(comptime name: []const u8) TraitFn {
+ const Closure = struct.{
+ pub fn trait(comptime T: type) bool {
+ if (!comptime hasDef(name)(T)) return false;
const DefType = @typeOf(@field(T, name));
const def_type_id = @typeId(DefType);
return def_type_id == builtin.TypeId.Fn;
@@ -130,10 +106,8 @@ pub fn hasFn(comptime name: []const u8) TraitFn
return Closure.trait;
}
-test "std.meta.trait.hasFn"
-{
- const TestStruct = struct.
- {
+test "std.meta.trait.hasFn" {
+ const TestStruct = struct.{
pub fn useless() void {}
};
@@ -143,36 +117,29 @@ test "std.meta.trait.hasFn"
}
///
-pub fn hasField(comptime name: []const u8) TraitFn
-{
- const Closure = struct.
- {
- pub fn trait(comptime T: type) bool
- {
+pub fn hasField(comptime name: []const u8) TraitFn {
+ const Closure = struct.{
+ pub fn trait(comptime T: type) bool {
const info = @typeInfo(T);
- const fields = switch(info)
- {
+ const fields = switch (info) {
builtin.TypeId.Struct => |s| s.fields,
builtin.TypeId.Union => |u| u.fields,
builtin.TypeId.Enum => |e| e.fields,
else => return false,
};
- inline for(fields) |field|
- {
- if(mem.eql(u8, field.name, name)) return true;
+ inline for (fields) |field| {
+ if (mem.eql(u8, field.name, name)) return true;
}
-
+
return false;
}
};
return Closure.trait;
}
-test "std.meta.trait.hasField"
-{
- const TestStruct = struct.
- {
+test "std.meta.trait.hasField" {
+ const TestStruct = struct.{
value: u32,
};
@@ -184,21 +151,16 @@ test "std.meta.trait.hasField"
}
///
-
-pub fn is(comptime id: builtin.TypeId) TraitFn
-{
- const Closure = struct.
- {
- pub fn trait(comptime T: type) bool
- {
+pub fn is(comptime id: builtin.TypeId) TraitFn {
+ const Closure = struct.{
+ pub fn trait(comptime T: type) bool {
return id == @typeId(T);
}
};
return Closure.trait;
}
-test "std.meta.trait.is"
-{
+test "std.meta.trait.is" {
debug.assert(is(builtin.TypeId.Int)(u8));
debug.assert(!is(builtin.TypeId.Int)(f32));
debug.assert(is(builtin.TypeId.Pointer)(*u8));
@@ -207,39 +169,31 @@ test "std.meta.trait.is"
}
///
-
-pub fn isPtrTo(comptime id: builtin.TypeId) TraitFn
-{
- const Closure = struct.
- {
- pub fn trait(comptime T: type) bool
- {
- if(!comptime isSingleItemPtr(T)) return false;
+pub fn isPtrTo(comptime id: builtin.TypeId) TraitFn {
+ const Closure = struct.{
+ pub fn trait(comptime T: type) bool {
+ if (!comptime isSingleItemPtr(T)) return false;
return id == @typeId(meta.Child(T));
}
};
return Closure.trait;
}
-test "std.meta.trait.isPtrTo"
-{
+test "std.meta.trait.isPtrTo" {
debug.assert(!isPtrTo(builtin.TypeId.Struct)(struct.{}));
debug.assert(isPtrTo(builtin.TypeId.Struct)(*struct.{}));
debug.assert(!isPtrTo(builtin.TypeId.Struct)(**struct.{}));
}
-
///////////Strait trait Fns
//@TODO:
// Somewhat limited since we can't apply this logic to normal variables, fields, or
// Fns yet. Should be isExternType?
-pub fn isExtern(comptime T: type) bool
-{
+pub fn isExtern(comptime T: type) bool {
const Extern = builtin.TypeInfo.ContainerLayout.Extern;
const info = @typeInfo(T);
- return switch(info)
- {
+ return switch (info) {
builtin.TypeId.Struct => |s| s.layout == Extern,
builtin.TypeId.Union => |u| u.layout == Extern,
builtin.TypeId.Enum => |e| e.layout == Extern,
@@ -247,8 +201,7 @@ pub fn isExtern(comptime T: type) bool
};
}
-test "std.meta.trait.isExtern"
-{
+test "std.meta.trait.isExtern" {
const TestExStruct = extern struct.{};
const TestStruct = struct.{};
@@ -258,13 +211,10 @@ test "std.meta.trait.isExtern"
}
///
-
-pub fn isPacked(comptime T: type) bool
-{
+pub fn isPacked(comptime T: type) bool {
const Packed = builtin.TypeInfo.ContainerLayout.Packed;
const info = @typeInfo(T);
- return switch(info)
- {
+ return switch (info) {
builtin.TypeId.Struct => |s| s.layout == Packed,
builtin.TypeId.Union => |u| u.layout == Packed,
builtin.TypeId.Enum => |e| e.layout == Packed,
@@ -272,8 +222,7 @@ pub fn isPacked(comptime T: type) bool
};
}
-test "std.meta.trait.isPacked"
-{
+test "std.meta.trait.isPacked" {
const TestPStruct = packed struct.{};
const TestStruct = struct.{};
@@ -283,19 +232,15 @@ test "std.meta.trait.isPacked"
}
///
-
-pub fn isSingleItemPtr(comptime T: type) bool
-{
- if(comptime is(builtin.TypeId.Pointer)(T))
- {
+pub fn isSingleItemPtr(comptime T: type) bool {
+ if (comptime is(builtin.TypeId.Pointer)(T)) {
const info = @typeInfo(T);
return info.Pointer.size == builtin.TypeInfo.Pointer.Size.One;
}
return false;
}
-test "std.meta.trait.isSingleItemPtr"
-{
+test "std.meta.trait.isSingleItemPtr" {
const array = []u8.{0} ** 10;
debug.assert(isSingleItemPtr(@typeOf(&array[0])));
debug.assert(!isSingleItemPtr(@typeOf(array)));
@@ -303,19 +248,15 @@ test "std.meta.trait.isSingleItemPtr"
}
///
-
-pub fn isManyItemPtr(comptime T: type) bool
-{
- if(comptime is(builtin.TypeId.Pointer)(T))
- {
+pub fn isManyItemPtr(comptime T: type) bool {
+ if (comptime is(builtin.TypeId.Pointer)(T)) {
const info = @typeInfo(T);
return info.Pointer.size == builtin.TypeInfo.Pointer.Size.Many;
}
return false;
}
-test "std.meta.trait.isManyItemPtr"
-{
+test "std.meta.trait.isManyItemPtr" {
const array = []u8.{0} ** 10;
const mip = @ptrCast([*]const u8, &array[0]);
debug.assert(isManyItemPtr(@typeOf(mip)));
@@ -324,19 +265,15 @@ test "std.meta.trait.isManyItemPtr"
}
///
-
-pub fn isSlice(comptime T: type) bool
-{
- if(comptime is(builtin.TypeId.Pointer)(T))
- {
+pub fn isSlice(comptime T: type) bool {
+ if (comptime is(builtin.TypeId.Pointer)(T)) {
const info = @typeInfo(T);
return info.Pointer.size == builtin.TypeInfo.Pointer.Size.Slice;
}
return false;
}
-test "std.meta.trait.isSlice"
-{
+test "std.meta.trait.isSlice" {
const array = []u8.{0} ** 10;
debug.assert(isSlice(@typeOf(array[0..])));
debug.assert(!isSlice(@typeOf(array)));
@@ -344,27 +281,22 @@ test "std.meta.trait.isSlice"
}
///
-
-pub fn isIndexable(comptime T: type) bool
-{
- if(comptime is(builtin.TypeId.Pointer)(T))
- {
- const info = @typeInfo(T);
- if(info.Pointer.size == builtin.TypeInfo.Pointer.Size.One)
- {
- if(comptime is(builtin.TypeId.Array)(meta.Child(T))) return true;
- return false;
- }
- return true;
- }
- return comptime is(builtin.TypeId.Array)(T);
+pub fn isIndexable(comptime T: type) bool {
+ if (comptime is(builtin.TypeId.Pointer)(T)) {
+ const info = @typeInfo(T);
+ if (info.Pointer.size == builtin.TypeInfo.Pointer.Size.One) {
+ if (comptime is(builtin.TypeId.Array)(meta.Child(T))) return true;
+ return false;
+ }
+ return true;
+ }
+ return comptime is(builtin.TypeId.Array)(T);
}
-test "std.meta.trait.isIndexable"
-{
+test "std.meta.trait.isIndexable" {
const array = []u8.{0} ** 10;
const slice = array[0..];
-
+
debug.assert(isIndexable(@typeOf(array)));
debug.assert(isIndexable(@typeOf(&array)));
debug.assert(isIndexable(@typeOf(slice)));
@@ -372,26 +304,18 @@ test "std.meta.trait.isIndexable"
}
///
-
-pub fn isNumber(comptime T: type) bool
-{
- return switch(@typeId(T))
- {
- builtin.TypeId.Int,
- builtin.TypeId.Float,
- builtin.TypeId.ComptimeInt,
- builtin.TypeId.ComptimeFloat => true,
+pub fn isNumber(comptime T: type) bool {
+ return switch (@typeId(T)) {
+ builtin.TypeId.Int, builtin.TypeId.Float, builtin.TypeId.ComptimeInt, builtin.TypeId.ComptimeFloat => true,
else => false,
};
}
-test "std.meta.trait.isNumber"
-{
- const NotANumber = struct.
- {
+test "std.meta.trait.isNumber" {
+ const NotANumber = struct.{
number: u8,
};
-
+
debug.assert(isNumber(u32));
debug.assert(isNumber(f32));
debug.assert(isNumber(u64));
@@ -402,16 +326,13 @@ test "std.meta.trait.isNumber"
}
///
-
-pub fn isConstPtr(comptime T: type) bool
-{
- if(!comptime is(builtin.TypeId.Pointer)(T)) return false;
+pub fn isConstPtr(comptime T: type) bool {
+ if (!comptime is(builtin.TypeId.Pointer)(T)) return false;
const info = @typeInfo(T);
return info.Pointer.is_const;
}
-test "std.meta.trait.isConstPtr"
-{
+test "std.meta.trait.isConstPtr" {
var t = u8(0);
const c = u8(0);
debug.assert(isConstPtr(*const @typeOf(t)));
@@ -421,12 +342,9 @@ test "std.meta.trait.isConstPtr"
}
///
-
-pub fn isContainer(comptime T: type) bool
-{
+pub fn isContainer(comptime T: type) bool {
const info = @typeInfo(T);
- return switch(info)
- {
+ return switch (info) {
builtin.TypeId.Struct => true,
builtin.TypeId.Union => true,
builtin.TypeId.Enum => true,
@@ -434,16 +352,18 @@ pub fn isContainer(comptime T: type) bool
};
}
-test "std.meta.trait.isContainer"
-{
+test "std.meta.trait.isContainer" {
const TestStruct = struct.{};
- const TestUnion = union.{ a: void, };
- const TestEnum = enum.{ A, B, };
-
+ const TestUnion = union.{
+ a: void,
+ };
+ const TestEnum = enum.{
+ A,
+ B,
+ };
+
debug.assert(isContainer(TestStruct));
debug.assert(isContainer(TestUnion));
debug.assert(isContainer(TestEnum));
debug.assert(!isContainer(u8));
}
-
-///
\ No newline at end of file
std/mem.zig
@@ -866,128 +866,123 @@ test "std.mem.endianSwap" {
assert(endianSwap(u32, 0xDEADBEEF) == 0xEFBEADDE);
}
-
-
-fn AsBytesReturnType(comptime P: type) type
-{
- if(comptime !trait.isSingleItemPtr(P)) @compileError("expected single item "
- ++ "pointer, passed " ++ @typeName(P));
+fn AsBytesReturnType(comptime P: type) type {
+ if (comptime !trait.isSingleItemPtr(P))
+ @compileError("expected single item " ++ "pointer, passed " ++ @typeName(P));
const size = usize(@sizeOf(meta.Child(P)));
const alignment = comptime meta.alignment(P);
- if(comptime trait.isConstPtr(P)) return *align(alignment) const [size]u8;
+
+ if (comptime trait.isConstPtr(P))
+ return *align(alignment) const [size]u8;
return *align(alignment) [size]u8;
}
///Given a pointer to a single item, returns a slice of the underlying bytes, preserving constness.
-pub fn asBytes(ptr: var) AsBytesReturnType(@typeOf(ptr))
-{
+pub fn asBytes(ptr: var) AsBytesReturnType(@typeOf(ptr)) {
const P = @typeOf(ptr);
return @ptrCast(AsBytesReturnType(P), ptr);
}
-test "std.mem.asBytes"
-{
+test "std.mem.asBytes" {
const deadbeef = u32(0xDEADBEEF);
- const deadbeef_bytes = switch(builtin.endian)
- {
+ const deadbeef_bytes = switch (builtin.endian) {
builtin.Endian.Big => "\xDE\xAD\xBE\xEF",
builtin.Endian.Little => "\xEF\xBE\xAD\xDE",
};
-
+
debug.assert(std.mem.eql(u8, asBytes(&deadbeef), deadbeef_bytes));
-
+
var codeface = u32(0xC0DEFACE);
- for(asBytes(&codeface).*) |*b| b.* = 0;
+ for (asBytes(&codeface).*) |*b|
+ b.* = 0;
debug.assert(codeface == 0);
-
- const S = packed struct.
- {
+
+ const S = packed struct.{
a: u8,
b: u8,
c: u8,
d: u8,
};
-
- const inst = S.{ .a = 0xBE, .b = 0xEF, .c = 0xDE, .d = 0xA1, };
+
+ const inst = S.{
+ .a = 0xBE,
+ .b = 0xEF,
+ .c = 0xDE,
+ .d = 0xA1,
+ };
debug.assert(std.mem.eql(u8, asBytes(&inst), "\xBE\xEF\xDE\xA1"));
}
///Given any value, returns a copy of its bytes in an array.
-pub fn toBytes(value: var) [@sizeOf(@typeOf(value))]u8
-{
+pub fn toBytes(value: var) [@sizeOf(@typeOf(value))]u8 {
return asBytes(&value).*;
}
-test "std.mem.toBytes"
-{
+test "std.mem.toBytes" {
var my_bytes = toBytes(u32(0x12345678));
- switch(builtin.endian)
- {
+ switch (builtin.endian) {
builtin.Endian.Big => debug.assert(std.mem.eql(u8, my_bytes, "\x12\x34\x56\x78")),
builtin.Endian.Little => debug.assert(std.mem.eql(u8, my_bytes, "\x78\x56\x34\x12")),
}
-
+
my_bytes[0] = '\x99';
- switch(builtin.endian)
- {
+ switch (builtin.endian) {
builtin.Endian.Big => debug.assert(std.mem.eql(u8, my_bytes, "\x99\x34\x56\x78")),
builtin.Endian.Little => debug.assert(std.mem.eql(u8, my_bytes, "\x99\x56\x34\x12")),
}
}
-
-fn BytesAsValueReturnType(comptime T: type, comptime B: type) type
-{
+fn BytesAsValueReturnType(comptime T: type, comptime B: type) type {
const size = usize(@sizeOf(T));
- if(comptime !trait.is(builtin.TypeId.Pointer)(B) or meta.Child(B) != [size]u8)
- {
+ if (comptime !trait.is(builtin.TypeId.Pointer)(B) or meta.Child(B) != [size]u8) {
@compileError("expected *[N]u8 " ++ ", passed " ++ @typeName(B));
}
-
+
const alignment = comptime meta.alignment(B);
-
- return if(comptime trait.isConstPtr(B)) *align(alignment) const T else *align(alignment) T;
+
+ return if (comptime trait.isConstPtr(B)) *align(alignment) const T else *align(alignment) T;
}
///Given a pointer to an array of bytes, returns a pointer to a value of the specified type
/// backed by those bytes, preserving constness.
-pub fn bytesAsValue(comptime T: type, bytes: var) BytesAsValueReturnType(T, @typeOf(bytes))
-{
+pub fn bytesAsValue(comptime T: type, bytes: var) BytesAsValueReturnType(T, @typeOf(bytes)) {
return @ptrCast(BytesAsValueReturnType(T, @typeOf(bytes)), bytes);
}
-test "std.mem.bytesAsValue"
-{
+test "std.mem.bytesAsValue" {
const deadbeef = u32(0xDEADBEEF);
- const deadbeef_bytes = switch(builtin.endian)
- {
+ const deadbeef_bytes = switch (builtin.endian) {
builtin.Endian.Big => "\xDE\xAD\xBE\xEF",
builtin.Endian.Little => "\xEF\xBE\xAD\xDE",
};
-
+
debug.assert(deadbeef == bytesAsValue(u32, &deadbeef_bytes).*);
-
- var codeface_bytes = switch(builtin.endian)
- {
+
+ var codeface_bytes = switch (builtin.endian) {
builtin.Endian.Big => "\xC0\xDE\xFA\xCE",
builtin.Endian.Little => "\xCE\xFA\xDE\xC0",
};
var codeface = bytesAsValue(u32, &codeface_bytes);
debug.assert(codeface.* == 0xC0DEFACE);
codeface.* = 0;
- for(codeface_bytes) |b| debug.assert(b == 0);
-
- const S = packed struct.
- {
+ for (codeface_bytes) |b|
+ debug.assert(b == 0);
+
+ const S = packed struct.{
a: u8,
b: u8,
c: u8,
d: u8,
};
-
- const inst = S.{ .a = 0xBE, .b = 0xEF, .c = 0xDE, .d = 0xA1, };
+
+ const inst = S.{
+ .a = 0xBE,
+ .b = 0xEF,
+ .c = 0xDE,
+ .d = 0xA1,
+ };
const inst_bytes = "\xBE\xEF\xDE\xA1";
const inst2 = bytesAsValue(S, &inst_bytes);
debug.assert(meta.eql(inst, inst2.*));
@@ -995,50 +990,43 @@ test "std.mem.bytesAsValue"
///Given a pointer to an array of bytes, returns a value of the specified type backed by a
/// copy of those bytes.
-pub fn bytesToValue(comptime T: type, bytes: var) T
-{
+pub fn bytesToValue(comptime T: type, bytes: var) T {
return bytesAsValue(T, &bytes).*;
}
- test "std.mem.bytesToValue"
-{
- const deadbeef_bytes = switch(builtin.endian)
- {
+test "std.mem.bytesToValue" {
+ const deadbeef_bytes = switch (builtin.endian) {
builtin.Endian.Big => "\xDE\xAD\xBE\xEF",
builtin.Endian.Little => "\xEF\xBE\xAD\xDE",
};
-
+
const deadbeef = bytesToValue(u32, deadbeef_bytes);
debug.assert(deadbeef == u32(0xDEADBEEF));
}
-
-fn SubArrayPtrReturnType(comptime T: type, comptime length: usize) type
-{
- if(trait.isConstPtr(T)) return *const [length]meta.Child(meta.Child(T));
+fn SubArrayPtrReturnType(comptime T: type, comptime length: usize) type {
+ if (trait.isConstPtr(T))
+ return *const [length]meta.Child(meta.Child(T));
return *[length]meta.Child(meta.Child(T));
}
///Given a pointer to an array, returns a pointer to a portion of that array, preserving constness.
-pub fn subArrayPtr(ptr: var, comptime start: usize, comptime length: usize)
- SubArrayPtrReturnType(@typeOf(ptr), length)
-{
+pub fn subArrayPtr(ptr: var, comptime start: usize, comptime length: usize) SubArrayPtrReturnType(@typeOf(ptr), length) {
debug.assert(start + length <= ptr.*.len);
-
+
const ReturnType = SubArrayPtrReturnType(@typeOf(ptr), length);
const T = meta.Child(meta.Child(@typeOf(ptr)));
return @ptrCast(ReturnType, &ptr[start]);
}
-test "std.mem.subArrayPtr"
-{
+test "std.mem.subArrayPtr" {
const a1 = "abcdef";
const sub1 = subArrayPtr(&a1, 2, 3);
debug.assert(std.mem.eql(u8, sub1.*, "cde"));
-
+
var a2 = "abcdef";
var sub2 = subArrayPtr(&a2, 2, 3);
debug.assert(std.mem.eql(u8, sub2, "cde"));
sub2[1] = 'X';
debug.assert(std.mem.eql(u8, a2, "abcXef"));
-}
\ No newline at end of file
+}