On 19/09/13 22:11, [email protected] wrote:
I'm attempting to write a syntax parser using clang to let me list out
tokens (variables, types, etc) for another toolset.
I have a file specified as
#include "bogus.h"
const bogus::bogus_type bogus::bogus_val = 0;
int main(){
int alpha = 40;
return(-1);
}
and I would expect to get a list of something like:
bogus::bogus_type
bogus_bogus_val
alpha
main
...
(built in values as well)
I'm using the C API, and for simple C files, it works fine. However
once I start going into C++ bodies, especially when the header file
isn't found (again, I only care about syntax, not making sure its
valid), it's giving me only:
alpha
main
and ignoring the bogus values. I'm almost thinking that I am basically
using too powerful of a tool for what I need, and I should find
something "dumber".
My main follows (whole thing also attached)
Compile with:
g++ parse.cpp -lclang -L/usr/lib64/llvm -o parse
int main(int argc, char* argv[]){
init_filter();
CXIndex index = clang_createIndex(1, 1);
unsigned int options = CXTranslationUnit_None;
// We don't want to expand any #include statements
// so disable the standard include locations
const unsigned int num_args = 2;
const char* const args[num_args] = {
"-nostdlibinc",
"-nostdinc"
};
std::cout << "-----------------" << std::endl;
// Parse the file
CXTranslationUnit tu =
clang_parseTranslationUnit (
index, // index to associate w/ this translation unit
argv[1], // source file name
args, // number command line args
num_args, // command line args
0, // number of unsaved files
NULL, // unsaved files
options
);
std::cout << "-----------------" << std::endl;
// Get a cursor into the parsed file
CXCursor cursor = clang_getTranslationUnitCursor(tu);
if(clang_Cursor_isNull(cursor)){
std::cout << "Cursor was NULL!" << std::endl;
exit(-1);
}
// Visit the children
clang_visitChildren(cursor, visitor, NULL);
// Print out the unique tokens
std::cout << std::endl << "Unique Tokens:" << std::endl;
for(tokenSet_t::iterator iter = token_set.begin();
iter != token_set.end();
++iter)
{
std::cout << "\t" << *iter << std::endl;
}
return 0;
}
Hello David,
once I tried to do something similar, but only looking at the loops &
procedures within the code. When I tried that I was on a hurry due to a
deadline, and I simply relied on the output of
clang -cc1 -ast-dump <inputfile>
which was almost complete for me. Maybe you can give this a try.
BTW, now I have some more spare time, I can try something like using
clang's API like you.
Just my 0.02€.
Best regards.
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