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Make PPerror message more verbose:

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give hint to buggy line segment
This commit is contained in:
Holger Vogt
2020-06-14 17:03:40 +02:00
parent 8bfe87aa6b
commit 6cfffe9545
1 changed files with 7 additions and 2 deletions
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src/frontend/parse-bison.y
+7 -2
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@@ -27,6 +27,8 @@
while (0) while (0)
static void PPerror (YYLTYPE *locp, char **line, struct pnode **retval, char const *); static void PPerror (YYLTYPE *locp, char **line, struct pnode **retval, char const *);
static char *keepline;
%} %}
%name-prefix "PP" %name-prefix "PP"
@@ -96,6 +98,7 @@
{ {
$$.num = 0.0; $$.num = 0.0;
yylloc.start = yylloc.stop = NULL; yylloc.start = yylloc.stop = NULL;
keepline = *line;
}; };
%% %%
@@ -170,6 +173,8 @@ PPerror (YYLTYPE *locp, char **line, struct pnode **retval, char const *s)
NG_IGNORE(locp); NG_IGNORE(locp);
NG_IGNORE(line); NG_IGNORE(line);
NG_IGNORE(retval); NG_IGNORE(retval);
char *tmpstr = strstr(keepline, *line);
fprintf (stderr, "%s: %s\n", __func__, s); size_t len = strlen(keepline);
fprintf (stderr, "%s: %s in line segment\n %s\nnear\n %*s\n",
__func__, s, keepline, len, strstr(keepline, *line));
} }