comparison mercurial/revsetlang.py @ 41561:59638c6fcb70

revset: extract a helper to parse integer range

It's getting common. As a first step, this patch adds getintrange() and
makes followlines() use it.

I wanted to unify the error messages to make the function interface simple,
but I failed to phrase it briefly.

41560:66399f2e92aa

        return x[1], None
    elif op == 'rangeall':
        return None, None
    raise error.ParseError(err)

def getargs(x, min, max, err):
    l = getlist(x)
    if len(l) < min or (max >= 0 and len(l) > max):
        raise error.ParseError(err)
    return l

41561:59638c6fcb70

        return x[1], None
    elif op == 'rangeall':
        return None, None
    raise error.ParseError(err)

def getintrange(x, err1, err2, deffirst=_notset, deflast=_notset):
    """Get [first, last] integer range (both inclusive) from a parsed tree

    If any of the sides omitted, and if no default provided, ParseError will
    be raised.
    """
    a, b = getrange(x, err1)
    return getinteger(a, err2, deffirst), getinteger(b, err2, deflast)

def getargs(x, min, max, err):
    l = getlist(x)
    if len(l) < min or (max >= 0 and len(l) > max):
        raise error.ParseError(err)
    return l