Enum Parser 

pub enum Parser<'lex, T, E> {
    Success(RefLexer<'lex>, T),
    Fail(RefLexer<'lex>, E),
}

Represents the result of a parsing operation.

A parser either succeeds with an advanced lexer and a parsed value T, or fails and returns the unchanged lexer state along with an error E.

Variants

Success(RefLexer<'lex>, T)

Fail(RefLexer<'lex>, E)

Implementations

impl<'lex, T, E> Parser<'lex, T, E>

pub fn or_else<F>(self, f: F) -> Self

where F: FnOnce(RefLexer<'_>) -> Parser<'_, T, E>,

Chains another parsing attempt if the current parser failed.

pub fn and_then<U, F>(self, f: F) -> Parser<'lex, U, E>

where F: FnOnce(RefLexer<'lex>, T) -> Parser<'lex, U, E>,

Chains a subsequent parser if the current parser succeeds.

pub fn success(self) -> Result<T, (RefLexer<'lex>, E)>

Converts this parser result into a standard Result, returning the parsed item or the lexer and error pair upon failure.