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Match C's preprocessor semantics for token pasting with '##'.

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This commit is contained in:
Dale Weiler 2014-04-07 06:00:04 -04:00
parent 606d7ac110
commit f1650c42d9
3 changed files with 14 additions and 4 deletions
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12
ftepp.c
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@ -763,6 +763,7 @@ static bool ftepp_macro_expand(ftepp_t *ftepp, ppmacro *macro, macroparam *param
lex_file *inlex;
bool old_inmacro;
bool strip = false;
int nextok;
@ -827,6 +828,7 @@ static bool ftepp_macro_expand(ftepp_t *ftepp, ppmacro *macro, macroparam *param
if (nextok == '#') {
/* raw concatenation */
++o;
strip = true;
break;
}
if ( (nextok == TOKEN_IDENT ||
@ -835,6 +837,7 @@ static bool ftepp_macro_expand(ftepp_t *ftepp, ppmacro *macro, macroparam *param
macro_params_find(macro, macro->output[o+1]->value, &pi))
{
++o;
ftepp_stringify(ftepp, &params[pi]);
break;
}
@ -845,7 +848,14 @@ static bool ftepp_macro_expand(ftepp_t *ftepp, ppmacro *macro, macroparam *param
ftepp_out(ftepp, "\n", false);
break;
default:
ftepp_out(ftepp, out->value, false);
buffer = out->value;
if (vec_size(macro->output) > o + 1 && macro->output[o+1]->token == '#')
buffer++;
if (strip) {
while (util_isspace(*buffer)) buffer++;
strip = false;
}
ftepp_out(ftepp, buffer, false);
break;
}
}

2
tests/pmacros.qc
View file

@ -26,7 +26,7 @@
# define ALPHA(SEL) ALPHA_##SEL
# define ABC ALPHA(a)##ALPHA(b)##ALPHA(c)
# define ABC ALPHA(a)ALPHA(b)ALPHA(c)
void() main = {
if (ABC == "abc")

4
tests/ppcat.qc
View file

@ -8,6 +8,6 @@ REDIR(CAT(hello, world), CAT(world, hello))
SCONS(hello, world)
#define FOO(X) X##X
#define BAR(X) FOO(X)##FOO(X)
#define BAR(X) FOO(X)FOO(X)
REDIR(BAR(hello), BAR(world))
REDIR(BAR(hello),BAR(world))