diff options
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index 81bdbbf..bfefeb2 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -5617,4 +5617,40 @@ fold_offsetof (tree expr) return convert (size_type_node, fold_offsetof_1 (expr)); } +/* Return nonzero if REF is an lvalue valid for this language; + otherwise, print an error message and return zero. USE says + how the lvalue is being used and so selects the error message. */ + +int +lvalue_or_else (tree ref, enum lvalue_use use) +{ + int win = lvalue_p (ref); + + if (!win) + { + switch (use) + { + case lv_assign: + error ("invalid lvalue in assignment"); + break; + case lv_increment: + error ("invalid lvalue in increment"); + break; + case lv_decrement: + error ("invalid lvalue in decrement"); + break; + case lv_addressof: + error ("invalid lvalue in unary %<&%>"); + break; + case lv_asm: + error ("invalid lvalue in asm statement"); + break; + default: + gcc_unreachable (); + } + } + + return win; +} + #include "gt-c-common.h" |