Comments (4)
mingodad
commented on August 19, 2024
I've been testing this C++ parser https://github.com/panda3d/panda3d/tree/master/dtool/src/cppparser and we had a bit of work done with it's preprocessor here panda3d/panda3d#1638 probably it's worth for you to now about it and maybe even collaborate both ways with then.
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mingodad
commented on August 19, 2024
Even when adding other text at the end of the macro the output miss the closing brace:
#define FOO(x) {x}
FOO(
#if 1
bar
#else
qux
#endif
)
int x;
Output:
# 1 "foo-if.c"
{
bar
int x;
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mingodad
commented on August 19, 2024
The problem seem to be here :
cplusplus/src/parser/cxx/preprocessor.cc
Lines 2658 to 2665 in 3b93d2b
When skipping the
endif you are only breaking the loop when it->bol is true but when tokenizing the } is not marked with bol equals true and is skipped, we need another way to manage it here.from cplusplus.
mingodad
commented on August 19, 2024
With this hack it seems to work, all tests pass and it parses sqlite3.c so far:
------------------------ src/parser/cxx/preprocessor.cc ------------------------
index c07548e..2fe9d51 100644
@@ -1651,7 +1651,8 @@ auto Preprocessor::Private::expand(
if (const auto start = it; it->bol && match(it, last, TokenKind::T_HASH)) {
// skip the rest of the line
- it = skipLine(it, last);
+ if (it->kind == TokenKind::T_IDENTIFIER && it->text == "endif") ++it;
+ else it = skipLine(it, last);
if (auto parsedInclude = parseDirective(source, start.toTokList())) {
NeedToResolveInclude status{
Output:
# 1 "foo-if.c"
{
bar }
int x;
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Related Issues (20)
- Can't parse "va_arg" HOT 7
- Changing "specs/grammar.txt" to an EBNF understood by https://www.bottlecaps.de/rr/ui HOT 8
- Can't parse sizeof properly HOT 2
- Do not recognize "#pragma one" HOT 8
- cxx doesn't report missing file passed for parsing HOT 1
- cxx can't handle string concatenation in macros correctly
- Fail to parse cppfront HOT 3
- expected a declaration "_Noreturn void __wasi_proc_exit(" HOT 2
- Bad preprocessing behavior HOT 12
- expected a declaration HOT 3
- Carbon "using Nonnull = T _Nonnull;"
- expected a declaration HOT 2
- Segmentation fault when parsing JUCE HOT 4
- expected a statement HOT 5
- Add "-M" and "-MM" command line options HOT 2
- Testing with examples from https://en.cppreference.com/w/ HOT 5
- return __extension__ (__m128){ 0.0f, 0.0f, 0.0f, 0.0f }; HOT 8
- Testing with https://github.com/duneroadrunner/SaferCPlusPlus
- Memory usage and permissive parsing with sqlite3 HOT 6
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