lean2/script/demangle_cpptype.py

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#!/usr/bin/env python
#
# Copyright (c) 2013 Microsoft Corporation. All rights reserved.
# Released under Apache 2.0 license as described in the file LICENSE.
#
# Author: Soonho Kong
#
# What's this?
# ============
# It takes an input from stdin and demangle c++ type if the line
# matches the following patten:
#
# .* : <C++_TYPE> := .*
#
# which, is the format that we are using in lean_assert.
#
# It calls "c++filt" to do the work.
#
# Python 2/3 compatibility
from __future__ import print_function
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import re
import sys
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import subprocess
import fileinput
pattern_str = "(.* : )([A-Za-z0-9]+)( := .*)"
pattern = re.compile(pattern_str)
cppfilt = "c++filt"
cppfilt_option = "--types"
def process_line(line):
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result = pattern.match(line);
if result == None:
print(line, end=' ')
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else:
p = subprocess.Popen(cppfilt + " " + cppfilt_option + " " + result.group(2),
shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
ty = p.stdout.readlines()[0].strip()
retval= p.wait()
new_str = re.sub(pattern_str, r"\1" + ty + r"\3", line);
print(new_str, end=' ')
if len(sys.argv) > 1:
for line in fileinput.input():
process_line(line)
else:
while True:
line = sys.stdin.readline()
if not line:
break
process_line(line)