def _compile_replacement_helper(pattern, template):
"Compiles a replacement template."
# This function is called by the _regex module.
# Have we seen this before?
key = pattern.pattern, pattern.flags, template
compiled = _replacement_cache.get(key)
if compiled is not None:
return compiled
if len(_replacement_cache) >= _MAXREPCACHE:
_replacement_cache.clear()
is_unicode = isinstance(template, str)
source = _Source(template)
if is_unicode:
def make_string(char_codes):
return "".join(chr(c) for c in char_codes)
else:
def make_string(char_codes):
return bytes(char_codes)
compiled = []
literal = []
while True:
ch = source.get()
if not ch:
break
if ch == "\\":
# '_compile_replacement' will return either an int group reference
# or a string literal. It returns items (plural) in order to handle
# a 2-character literal (an invalid escape sequence).
is_group, items = _compile_replacement(source, pattern, is_unicode)
if is_group:
# It's a group, so first flush the literal.
if literal:
compiled.append(make_string(literal))
literal = []
compiled.extend(items)
else:
literal.extend(items)
else:
literal.append(ord(ch))
# Flush the literal.
if literal:
compiled.append(make_string(literal))
_replacement_cache[key] = compiled
return compiled
def _compile_replacement_helper(pattern, template):
"Compiles a replacement template."
# This function is called by the _regex module.
# Have we seen this before?
key = pattern.pattern, pattern.flags, template
compiled = _replacement_cache.get(key)
if compiled is not None:
return compiled
if len(_replacement_cache) >= _MAXREPCACHE:
_replacement_cache.clear()
is_unicode = isinstance(template, unicode)
source = _Source(template)
if is_unicode:
def make_string(char_codes):
return u"".join(unichr(c) for c in char_codes)
else:
def make_string(char_codes):
return "".join(chr(c) for c in char_codes)
compiled = []
literal = []
while True:
ch = source.get()
if not ch:
break
if ch == "\\":
# '_compile_replacement' will return either an int group reference
# or a string literal. It returns items (plural) in order to handle
# a 2-character literal (an invalid escape sequence).
is_group, items = _compile_replacement(source, pattern, is_unicode)
if is_group:
# It's a group, so first flush the literal.
if literal:
compiled.append(make_string(literal))
literal = []
compiled.extend(items)
else:
literal.extend(items)
else:
literal.append(ord(ch))
# Flush the literal.
if literal:
compiled.append(make_string(literal))
_replacement_cache[key] = compiled
return compiled
