Class AsPattern

mypy/patterns.py:25–42

The pattern as

class AsPattern(Pattern):
    """The pattern <pattern> as <name>"""

    # The python ast, and therefore also our ast merges capture, wildcard and as patterns into one
    # for easier handling.
    # If pattern is None this is a capture pattern. If name and pattern are both none this is a
    # wildcard pattern.
    # Only name being None should not happen but also won't break anything.
    pattern: Pattern | None
    name: NameExpr | None

    def __init__(self, pattern: Pattern | None, name: NameExpr | None) -> None:
        super().__init__()
        self.pattern = pattern
        self.name = name

    def accept(self, visitor: PatternVisitor[T]) -> T:
        return visitor.visit_as_pattern(self)


class OrPattern(Pattern):