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* src/reader.c (grammar_current_rule_check): Also check that $$

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is used.
Take the rule to check as argument, hence rename as...
(grammar_rule_check): this.
* src/reader.h, src/reader.c (grammar_rule_begin, grammar_rule_end):
Rename as...
(grammar_rule_begin, grammar_rule_end): these, for consistency.
(grammar_midrule_action, grammar_symbol_append): Now static.
* tests/torture.at (input): Don't rely on the default action
being always performed.
* tests/calc.at: "Set" $$ even when the action is "cut" with
YYERROR or other.
* tests/actions.at (Exotic Dollars): Instead of using unused
values, check that the warning is issued.
This commit is contained in:
Akim Demaille
2005-12-27 17:50:00 +00:00
parent f8e1c9e55b
commit 8f3596a633
11 changed files with 217 additions and 193 deletions
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10
NEWS
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@@ -7,13 +7,13 @@ Changes in version 2.1a:
Typed right-hand side symbols whose value are not used are reported.
For instance:
exp: exp "?" exp ":" exp { $$ = $1 ? $1 : $3; }
exp: exp "?" exp ":" exp { $1 ? $1 : $3; }
| exp "+" exp
;
will trigger a warning about $5 of the first rule, and $3 in the
second ($1 is copied to $$ by the default rule). This example
most likely contains two errors, and should be rewritten as:
will trigger a warning about $$ and $5 in the first rule, and $3 in
the second ($1 is copied to $$ by the default rule). This example
most likely contains three errors, and should be rewritten as:
exp: exp "?" exp ":" exp { $$ = $1 ? $3 : $5; }
| exp "+" exp { $$ = $1 + $3; }
@@ -22,7 +22,7 @@ Changes in version 2.1a:
However, if the original actions were really intended, the warnings
can be suppressed by letting Bison believe the values are used, e.g.:
exp: exp "?" exp ":" exp { $$ = $1 ? $1 : $3; (void) $5; }
exp: exp "?" exp ":" exp { $1 ? $1 : $3; (void) ($$, $5); }
| exp "+" exp { $$ = $1; (void) $3; }
;