searching for c++ code parser to see all signatures

Question

I'm looking for a c++ parser which is able to extract all the functions and methods with its signatures. Is there something like this?

I had a look at gccxml there I have the problem, that it is not able to use namespaces and its not fine when only a header file is present.

Answer 1

The Clang compiler obviously has the functionality to do this, if I remember correctly there's even an API to access the code tree generated by the parser.

Answer 2

Most obvious options:

1. ctags
2. cscope

Just a sample of the GCC man page:

-fdump-noaddr -fdump-unnumbered -fdump-translation-unit[-n] -fdump-class-hierarchy[-n] -fdump-ipa-all -fdump-ipa-cgraph -fdump-ipa-inline
           -fdump-statistics -fdump-tree-all -fdump-tree-original[-n] -fdump-tree-optimized[-n] -fdump-tree-cfg -fdump-tree-vcg -fdump-tree-alias -fdump-tree-ch -fdump-tree-ssa[-n] -fdump-tree-pre[-n] -fdump-tree-ccp[-n] -fdump-tree-dce[-n]
           -fdump-tree-gimple[-raw] -fdump-tree-mudflap[-n] -fdump-tree-dom[-n] -fdump-tree-dse[-n] -fdump-tree-phiopt[-n] -fdump-tree-forwprop[-n] -fdump-tree-copyrename[-n] -fdump-tree-nrv -fdump-tree-vect -fdump-tree-sink -fdump-tree-sra[-n]
           -fdump-tree-fre[-n] -fdump-tree-vrp

Also there is a gccxml backend

Answer 3

You can use the -dump option of the abi-compliance-checker tool to parse signatures of functions and methods from your header file(s):

abi-compliance-checker -lib NAME -dump DESC.xml -headers-only -stdout > api.dump

XML-descriptor (DESC.xml) is the following:

<version>
    VERSION
</version>

<headers>
    /path(s)/to/headers/
</headers>

The tool works as following:

1. Call GCC with -fdump-translation-unit and a set of automagically generated -I... options on the headers specified in the input XML-descriptor;
2. Parse the AST dump generated by the GCC;
3. Generate function signatures and type definitions in the Data::Dumper or XML format (if additional -xml option is provided).

The sample signature of int BZ2_bzRead ( int *bzerror, BZFILE *b, void *buf, int len ) function from bzlib.h header looks like:

'228' => {
   'Header' => 'bzlib.h',
   'Line' => '160',
   'Param' => {
                '0' => {
                         'algn' => '4',
                         'name' => 'bzerror',
                         'type' => '30'
                       },
                '1' => {
                         'algn' => '4',
                         'name' => 'b',
                         'type' => '16'
                       },
                '2' => {
                         'algn' => '4',
                         'name' => 'buf',
                         'type' => '68'
                       },
                '3' => {
                         'algn' => '4',
                         'name' => 'len',
                         'type' => '41'
                       }
              },
   'Return' => '41',
   'ShortName' => 'BZ2_bzRead'
 },

Answer 4

you could try compiling your code with the save-temps flag set on gcc, this makes gcc output the files with macro unfolding and full signatures. these are the .ii files.