Enum rustc_expand::mbe::macro_parser::ParseResult

pub(crate) enum ParseResult<T> {
    Success(T),
    Failure(Token, &'static str),
    Error(Span, String),
    ErrorReported,
}

Represents the possible results of an attempted parse.

Variants

Success(T)

Parsed successfully.

Tuple Fields of Success

0: T

Failure(Token, &'static str)

Arm failed to match. If the second parameter is token::Eof, it indicates an unexpected end of macro invocation. Otherwise, it indicates that no rules expected the given token.

Tuple Fields of Failure

0: Token1: &'static str

Error(Span, String)

Fatal error (malformed macro?). Abort compilation.

Tuple Fields of Error

0: Span1: String

ErrorReported

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.