# Copyright (c) 2011 Google Inc. All rights reserved.
# Copyright (c) 2009 Torch Mobile Inc.
#
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# modification, are permitted provided that the following conditions are
# met:
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# notice, this list of conditions and the following disclaimer.
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# in the documentation and/or other materials provided with the
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import re

# Matches Foo *foo declarations.
_RE_PATTERN_POINTER_DECLARATION_WHITESPACE = re.compile(
    r'\s*\w+((?<!\breturn|\bdelete)(?<!\bco_return))\s+'
    r'(?P<pointer_operator>\*|\&)\w+')


def CheckPointerDeclarationWhitespace(filename, clean_lines, linenum, error):
    """Checks for Foo *foo declarations.

  Args:
    filename: The name of the current file.
    clean_lines: A CleansedLines instance containing the file.
    linenum: The number of the line to check.
    error: The function to call with any errors found.
  """
    line = clean_lines.elided[linenum]
    matched = _RE_PATTERN_POINTER_DECLARATION_WHITESPACE.match(line)
    if matched:
        error(
            filename, linenum, 'whitespace/declaration', 3,
            'Declaration has space between type name and %s in %s' %
            (matched.group('pointer_operator'), matched.group(0).strip()))