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import sys
from pycparser.c_ast import *
from pycparser.c_parser import CParser, Coord, ParseError
from pycparser.c_lexer import CLexer
def expand_decl(decl):
""" Converts the declaration into a nested list.
"""
typ = type(decl)
if typ == TypeDecl:
return ['TypeDecl', expand_decl(decl.type)]
elif typ == IdentifierType:
return ['IdentifierType', decl.names]
elif typ == ID:
return ['ID', decl.name]
elif typ in [Struct, Union]:
decls = [expand_decl(d) for d in decl.decls or []]
return [typ.__name__, decl.name, decls]
else:
nested = expand_decl(decl.type)
if typ == Decl:
if decl.quals:
return ['Decl', decl.quals, decl.name, nested]
else:
return ['Decl', decl.name, nested]
elif typ == Typename: # for function parameters
if decl.quals:
return ['Typename', decl.quals, nested]
else:
return ['Typename', nested]
elif typ == ArrayDecl:
dimval = decl.dim.value if decl.dim else ''
return ['ArrayDecl', dimval, nested]
elif typ == PtrDecl:
return ['PtrDecl', nested]
elif typ == Typedef:
return ['Typedef', decl.name, nested]
elif typ == FuncDecl:
if decl.args:
params = [expand_decl(param) for param in decl.args.params]
else:
params = []
return ['FuncDecl', params, nested]
#-----------------------------------------------------------------
if __name__ == "__main__":
source_code = """
int main()
{
const union blahunion tt = {
.joe = {0, 1},
.boo.bar[2] = 4};
p++;
int a;
}
"""
source_code = """
union
{
long sa;
int sb;
float;
};
"""
#--------------- Lexing
#~ from pycparser.portability import printme
#~ def errfoo(msg, a, b):
#~ printme(msg)
#~ sys.exit()
#~ clex = CLexer(errfoo, lambda t: False)
#~ clex.build()
#~ clex.input(source_code)
#~ while 1:
#~ tok = clex.token()
#~ if not tok: break
#~ printme([tok.value, tok.type, tok.lineno, clex.filename, tok.lexpos])
#--------------- Parsing
parser = CParser()
ast = parser.parse(source_code)
ast.show()
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