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java: add support for parse.error custom

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* data/skeletons/lalr1.java: Add support for custom parse errors.
(yyntokens_): Make it public.  Under...
(yyntokens): this name.
(Context): Capture the location too.
* examples/c/bistromathic/parse.y,
* examples/c/bistromathic/bistromathic.test:
Improve error message.
* examples/java/calc/Calc.test, examples/java/calc/Calc.y: Use custom
error messages.
* tests/calc.at, tests/local.at: Check custom error messages.
This commit is contained in:
Akim Demaille
2020-02-08 14:19:03 +01:00
parent 0c90c59795
commit ef097719ea
8 changed files with 95 additions and 29 deletions
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4
examples/c/bistromathic/parse.y
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@@ -200,8 +200,8 @@ yyreport_syntax_error (const yyparse_context_t *ctx)
YY_LOCATION_PRINT (stderr, *yyparse_context_location (ctx));
fprintf (stderr, ": syntax error");
for (int i = 1; i < n; ++i)
fprintf (stderr, " %s %s",
i == 1 ? "expected" : "or", yysymbol_name (arg[i]));
fprintf (stderr, "%s %s",
i == 1 ? ": expected" : " or", yysymbol_name (arg[i]));
if (n)
fprintf (stderr, " before %s", yysymbol_name (arg[0]));
fprintf (stderr, "\n");