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| author | Richard Stallman <rms@gnu.org> | 1992-08-14 23:45:09 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1992-08-14 23:45:09 +0000 |
| commit | e2aab13d8a41cc85fbfd055fe0d4c4a2f803c6d5 (patch) | |
| tree | 63df47991531570f8475f3113406b3c635ab49fa /gcc/c-common.c | |
| parent | 390e01bf6cf8c2322a558ed62fd4c213c8cd6fc6 (diff) | |
| download | gcc-e2aab13d8a41cc85fbfd055fe0d4c4a2f803c6d5.zip gcc-e2aab13d8a41cc85fbfd055fe0d4c4a2f803c6d5.tar.gz gcc-e2aab13d8a41cc85fbfd055fe0d4c4a2f803c6d5.tar.bz2 | |
(truthvalue_conversion): Optionally warn if an
unparenthesized assignment is used as a truth value.
From-SVN: r1853
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index 50aa60e..33804c4 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -901,6 +901,11 @@ truthvalue_conversion (expr) fold (build1 (NOP_EXPR, TREE_TYPE (TREE_OPERAND (expr, 0)), TREE_OPERAND (expr, 1))), 1); + + case MODIFY_EXPR: + if (warn_parentheses && C_EXP_ORIGINAL_CODE (expr) == MODIFY_EXPR) + warning ("suggest parentheses around assignment used as truth value"); + break; } return build_binary_op (NE_EXPR, expr, integer_zero_node, 1); |