1// becomes TEXT
 2#define @STRING@
 3#define ${STRING}
 4
 5// becomes `at`TEXT`at`
 6#define @${STRING}@
 7#define @@STRING@@
 8
 9// becomes TRAP
10#define ${@STRING@}
11
12// becomes `dollar sign`{STRING}
13#define $@STRING_CURLY@
14#define $${STRING_CURLY}
15
16// becomes `dollar sign`{STRING}
17#define @STRING_VAR@
18#define ${STRING_VAR}
19
20// becomes `dollar sign`{TEXT}
21#define ${DOLLAR}{${STRING}}
22#define @DOLLAR@{${STRING}}
23
24// becomes `at`STRING`at`
25#define ${STRING_AT}
26#define @STRING_AT@
27
28#define \@STRING_VAR\@
29#define \${STRING_VAR}
30#define $\{STRING_VAR}