comparison mercurial/templater.py @ 36278:c6ce479f7a28

templater: add function to help substituting patterns in template string

This will be used to rewrite a filename pattern to a template string.

36277:18bdfad8506e

            return parsed, pos
        else:
            raise error.ProgrammingError('unexpected type: %s' % typ)
    raise error.ProgrammingError('unterminated scanning of template')

def _scantemplate(tmpl, start, stop, quote=''):
    """Parse template string into chunks of strings and template expressions"""
    sepchars = '{' + quote
    pos = start
    p = parser.parser(elements)

36278:c6ce479f7a28

            return parsed, pos
        else:
            raise error.ProgrammingError('unexpected type: %s' % typ)
    raise error.ProgrammingError('unterminated scanning of template')

def scantemplate(tmpl):
    """Scan (type, start, end) positions of outermost elements in template

    >>> list(scantemplate(b'foo{bar}"baz'))
    [('string', 0, 3), ('template', 3, 8), ('string', 8, 12)]
    >>> list(scantemplate(b'outer{"inner"}outer'))
    [('string', 0, 5), ('template', 5, 14), ('string', 14, 19)]
    >>> list(scantemplate(b'foo\\{escaped}'))
    [('string', 0, 5), ('string', 5, 13)]
    """
    last = None
    for typ, val, pos in _scantemplate(tmpl, 0, len(tmpl)):
        if last:
            yield last + (pos,)
        if typ == 'end':
            return
        else:
            last = (typ, pos)
    raise error.ProgrammingError('unterminated scanning of template')

def _scantemplate(tmpl, start, stop, quote=''):
    """Parse template string into chunks of strings and template expressions"""
    sepchars = '{' + quote
    pos = start
    p = parser.parser(elements)