diff options
Diffstat (limited to 'src/glsl/glcpp')
| -rw-r--r-- | src/glsl/glcpp/glcpp-parse.y | 60 | ||||
| -rw-r--r-- | src/glsl/glcpp/tests/075-elif-elif-undef.c | 4 | ||||
| -rw-r--r-- | src/glsl/glcpp/tests/075-elif-elif-undef.c.expected | 5 | ||||
| -rw-r--r-- | src/glsl/glcpp/tests/076-elif-undef-nested.c | 5 | ||||
| -rw-r--r-- | src/glsl/glcpp/tests/076-elif-undef-nested.c.expected | 6 |
5 files changed, 61 insertions, 19 deletions
diff --git a/src/glsl/glcpp/glcpp-parse.y b/src/glsl/glcpp/glcpp-parse.y index a438357450..643c449d0e 100644 --- a/src/glsl/glcpp/glcpp-parse.y +++ b/src/glsl/glcpp/glcpp-parse.y @@ -223,14 +223,22 @@ control_line: talloc_free ($2); } | HASH_IF conditional_tokens NEWLINE { - /* If we're skipping to the next #elif/#else case or to #endif, - * don't bother expanding or parsing the expression. - */ - if (parser->skip_stack != NULL && parser->skip_stack->type != SKIP_NO_SKIP) { + /* Be careful to only evaluate the 'if' expression if + * we are not skipping. When we are skipping, we + * simply push a new 0-valued 'if' onto the skip + * stack. + * + * This avoids generating diagnostics for invalid + * expressions that are being skipped. */ + if (parser->skip_stack == NULL || + parser->skip_stack->type == SKIP_NO_SKIP) + { + _glcpp_parser_expand_if (parser, IF_EXPANDED, $2); + } + else + { _glcpp_parser_skip_stack_push_if (parser, & @1, 0); parser->skip_stack->type = SKIP_TO_ENDIF; - } else { - _glcpp_parser_expand_if (parser, IF_EXPANDED, $2); } } | HASH_IFDEF IDENTIFIER junk NEWLINE { @@ -244,24 +252,38 @@ control_line: _glcpp_parser_skip_stack_push_if (parser, & @1, macro == NULL); } | HASH_ELIF conditional_tokens NEWLINE { - /* If we just finished a non-skipped #if/#ifdef/#ifndef block, - * don't bother expanding or parsing the expression. - */ - if (parser->skip_stack != NULL && parser->skip_stack->type == SKIP_NO_SKIP) - parser->skip_stack->type = SKIP_TO_ENDIF; - else + /* Be careful to only evaluate the 'elif' expression + * if we are not skipping. When we are skipping, we + * simply change to a 0-valued 'elif' on the skip + * stack. + * + * This avoids generating diagnostics for invalid + * expressions that are being skipped. */ + if (parser->skip_stack && + parser->skip_stack->type == SKIP_TO_ELSE) + { _glcpp_parser_expand_if (parser, ELIF_EXPANDED, $2); + } + else + { + _glcpp_parser_skip_stack_change_if (parser, & @1, + "elif", 0); + } } | HASH_ELIF NEWLINE { - /* #elif without an expression results in a warning if the - * condition doesn't matter (we just handled #if 1 or such) - * but an error otherwise. */ - if (parser->skip_stack != NULL && parser->skip_stack->type == SKIP_NO_SKIP) { - parser->skip_stack->type = SKIP_TO_ENDIF; - glcpp_warning(& @1, parser, "ignoring illegal #elif without expression"); - } else { + /* #elif without an expression is an error unless we + * are skipping. */ + if (parser->skip_stack && + parser->skip_stack->type == SKIP_TO_ELSE) + { glcpp_error(& @1, parser, "#elif needs an expression"); } + else + { + _glcpp_parser_skip_stack_change_if (parser, & @1, + "elif", 0); + glcpp_warning(& @1, parser, "ignoring illegal #elif without expression"); + } } | HASH_ELSE NEWLINE { _glcpp_parser_skip_stack_change_if (parser, & @1, "else", 1); diff --git a/src/glsl/glcpp/tests/075-elif-elif-undef.c b/src/glsl/glcpp/tests/075-elif-elif-undef.c new file mode 100644 index 0000000000..264bc4f10e --- /dev/null +++ b/src/glsl/glcpp/tests/075-elif-elif-undef.c @@ -0,0 +1,4 @@ +#ifndef UNDEF +#elif UNDEF < 0 +#elif UNDEF == 3 +#endif diff --git a/src/glsl/glcpp/tests/075-elif-elif-undef.c.expected b/src/glsl/glcpp/tests/075-elif-elif-undef.c.expected new file mode 100644 index 0000000000..3f2ff2d6cc --- /dev/null +++ b/src/glsl/glcpp/tests/075-elif-elif-undef.c.expected @@ -0,0 +1,5 @@ + + + + + diff --git a/src/glsl/glcpp/tests/076-elif-undef-nested.c b/src/glsl/glcpp/tests/076-elif-undef-nested.c new file mode 100644 index 0000000000..ebd550ed00 --- /dev/null +++ b/src/glsl/glcpp/tests/076-elif-undef-nested.c @@ -0,0 +1,5 @@ +#ifdef UNDEF +#if UNDEF == 4 +#elif UNDEF == 5 +#endif +#endif diff --git a/src/glsl/glcpp/tests/076-elif-undef-nested.c.expected b/src/glsl/glcpp/tests/076-elif-undef-nested.c.expected new file mode 100644 index 0000000000..6fb66a5e2f --- /dev/null +++ b/src/glsl/glcpp/tests/076-elif-undef-nested.c.expected @@ -0,0 +1,6 @@ + + + + + + |