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Improve support for __extension__ keyword #72

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8 changes: 8 additions & 0 deletions pycparserext/ext_c_parser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -546,6 +546,14 @@ def p_statement(self, p):
"""
p[0] = p[1]

def p_gnu_primary_expression_7(self, p):
""" primary_expression : __EXTENSION__ primary_expression """
p[0] = p[2]

def p_gnu_assignment_expression_2(self, p):
""" assignment_expression : __EXTENSION__ assignment_expression """
p[0] = p[2]

def p_attribute_const(self, p):
""" attribute : __CONST
"""
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13 changes: 13 additions & 0 deletions test/test_pycparserext.py
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Original file line number Diff line number Diff line change
Expand Up @@ -348,6 +348,19 @@ def test_lvalue_gnu_statement_expression():
print(GnuCGenerator().visit(ast))


def test_gnu_extension_expression():
src = """
int func(int a) {
int i = (4,__extension__ 2);
char * name = __extension__ __PRETTY_FUNCTION__;
i = __extension__ i++;
i = __extension__((__extension__ i)++ + (--(__extension__ i)));
return __extension__(int)__extension__({; ; i;});
}
"""
assert _round_trip_matches(src)


def test_empty_struct_declaration():
src = """
typedef struct Foo {
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