comparison mercurial/match.py @ 33378:adf95bfb423a

match: make nevermatcher an exact matcher and a prefix matcher

The m.isexact() and m.prefix() methods are used by callers to
determine whether m.files() can be used for fast paths. It seems safe
to let callers to any fast paths it can that rely on the empty
m.files().

33377:5d63e5f40bea

class nevermatcher(basematcher):
    '''Matches nothing.'''

    def __init__(self, root, cwd, badfn=None):
        super(nevermatcher, self).__init__(root, cwd, badfn)

    def __repr__(self):
        return '<nevermatcher>'

class patternmatcher(basematcher):

33378:adf95bfb423a

class nevermatcher(basematcher):
    '''Matches nothing.'''

    def __init__(self, root, cwd, badfn=None):
        super(nevermatcher, self).__init__(root, cwd, badfn)

    # It's a little weird to say that the nevermatcher is an exact matcher
    # or a prefix matcher, but it seems to make sense to let callers take
    # fast paths based on either. There will be no exact matches, nor any
    # prefixes (files() returns []), so fast paths iterating over them should
    # be efficient (and correct).
    def isexact(self):
        return True

    def prefix(self):
        return True

    def __repr__(self):
        return '<nevermatcher>'

class patternmatcher(basematcher):