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Add elsif support (Martin Whitaker)

This commit is contained in:
steve 2007-05-30 23:21:20 +00:00
parent 8dcd09797f
commit 29aa68302e
1 changed files with 58 additions and 5 deletions
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63
ivlpp/lexor.lex
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@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: lexor.lex,v 1.47 2007/05/25 18:21:39 steve Exp $"
#ident "$Id: lexor.lex,v 1.48 2007/05/30 23:21:20 steve Exp $"
#endif
# include "config.h"
@ -118,11 +118,11 @@ static void ifdef_leave(void)
if (strcmp(istack->path,cur->path) != 0) {
fprintf(stderr, "%s:%u: warning: "
"This `endif matches an ifdef in another file.\n",
istack->path, istack->lineno);
istack->path, istack->lineno+1);
fprintf(stderr, "%s:%u: : "
"This is the odd matched `ifdef.\n",
cur->path, cur->lineno);
cur->path, cur->lineno+1);
}
free(cur->path);
@ -316,7 +316,24 @@ W [ \t\b\f]+
yy_push_state(IFDEF_SUPR);
}
<IFDEF_TRUE>`else { BEGIN(IFDEF_FALSE); }
<IFDEF_TRUE>`elsif{W}[a-zA-Z_][a-zA-Z0-9_$]* {
BEGIN(IFDEF_SUPR);
}
<IFDEF_FALSE>`elsif{W}[a-zA-Z_][a-zA-Z0-9_$]* {
char*name = strchr(yytext, '`');
assert(name);
name += 6;
name += strspn(name, " \t\b\f");
if (is_defined(name)) {
BEGIN(IFDEF_TRUE);
} else {
BEGIN(IFDEF_FALSE);
}
}
<IFDEF_SUPR>`elsif{W}[a-zA-Z_][a-zA-Z0-9_$]* { }
<IFDEF_TRUE>`else { BEGIN(IFDEF_SUPR); }
<IFDEF_FALSE>`else { BEGIN(IFDEF_TRUE); }
<IFDEF_SUPR>`else { }
@ -329,6 +346,42 @@ W [ \t\b\f]+
<IFDEF_FALSE,IFDEF_TRUE,IFDEF_SUPR>`endif { ifdef_leave(); yy_pop_state(); }
`ifdef {
fprintf(stderr, "%s:%u: `ifdef without a macro name - ignored.\n",
istack->path, istack->lineno+1);
error_count += 1;
}
`ifndef {
fprintf(stderr, "%s:%u: `ifndef without a macro name - ignored.\n",
istack->path, istack->lineno+1);
error_count += 1;
}
`elsif {
fprintf(stderr, "%s:%u: `elsif without a macro name - ignored.\n",
istack->path, istack->lineno+1);
error_count += 1;
}
`elsif{W}[a-zA-Z_][a-zA-Z0-9_$]* {
fprintf(stderr, "%s:%u: `elsif without a matching `ifdef - ignored.\n",
istack->path, istack->lineno+1);
error_count += 1;
}
`else {
fprintf(stderr, "%s:%u: `else without a matching `ifdef - ignored.\n",
istack->path, istack->lineno+1);
error_count += 1;
}
`endif {
fprintf(stderr, "%s:%u: `endif without a matching `ifdef - ignored.\n",
istack->path, istack->lineno+1);
error_count += 1;
}
/* This pattern notices macros and arranges for them to be replaced. */
`[a-zA-Z][a-zA-Z0-9_$]* { def_match(); }
@ -766,7 +819,7 @@ static void lexor_done()
ifdef_stack = cur->next;
fprintf(stderr, "%s:%u: error: This `ifdef lacks an `endif.\n",
cur->path, cur->lineno);
cur->path, cur->lineno+1);
free(cur->path);
free(cur);