lark-extern

from lark import Lark

test_str = """
//asdasd

extern "C"
{

//odfsafd
def ak():

//blablabla
def xkcd():

}

"""

pydef_parser = Lark(r"""
file:  (COMMENT)* "extern 'C' {" [(COMMENT)*(def)*]* "}"
def: "def" FUNCNAME "():"

FUNCNAME: LETTER[(INT)*(LETTER)*]*
COMMENT: /\/\/[^\n]*/
       | /#include[^\n]*/

%import common.LETTER
%import common.INT
%import common.WS
%ignore WS
%ignore COMMENT
""", start="file")

print(pydef_parser.parse(test_str))