CDT failed to parse some preprocessed c code about cdt

[Neuromancer42]

Thank you for the hint for debug. I've found the root cause and the solution.

The keyword __int128 is added into the keyword list of the scanner CPreprocessor only when GCC version >= 4.7. By default, no GCC version is set and thus the keyword is not identified.

So the solution is setting GCC version number by setting the key __GNUC__ and __GNUC_MINOR__ in the Map<String, String> definedSymbols. Then __int128 can be parsed.

[jonahgraham]

Can you add instructions on how to build and run your example, I get:

$ java cdtdemo.Main
Error: Unable to initialize main class cdtdemo.Main
Caused by: java.lang.NoClassDefFoundError: org/eclipse/core/runtime/CoreException

[jonahgraham]

FWIW the sample you have works if I open it in a CDT editor, but there is something odd happening around the * __Y; as if I remove the ; I don't get an error:

but I do get an error if I remove the ; on the next line I do:

[Neuromancer42]

Can you add instructions on how to build and run your example, I get:

$ java cdtdemo.Main
Error: Unable to initialize main class cdtdemo.Main
Caused by: java.lang.NoClassDefFoundError: org/eclipse/core/runtime/CoreException

It can be runned by ./gradlew run.cdtdemo

[Neuromancer42]

FWIW the sample you have works if I open it in a CDT editor, but there is something odd happening around the * __Y; as if I remove the ; I don't get an error:

but I do get an error if I remove the ; on the next line I do:

The strange thing is that the IASTProblem (actually CASTProblemStatement I think) locates itself at an 8 in __int128

[jonahgraham]

The issue is the __int128 correct? I am not sure what the solution is, I recommend having a look at the CDT test suite org.eclipse.cdt.core.parser.tests.ast2.AST2TestBase.parse(String, ParserLanguage, boolean, boolean, int) to see if that guides you.

[jonahgraham]

That is great to hear. I'll close this issue now.