Module lookahead 

Support for “peeking” into the token stream to decide how to parse.

Structs

AnyLit 🔒

A struct that can be used to match any literal

AnyOf 🔒

A rule that matches if any of the rules in a list matches

LAngle 🔒

This is the same as RAngle but for opening angle brackets.

Lookahead1 🔒

Support for checking the next token in a stream to decide how to parse.

NonReserved 🔒

A struct that can be used to match a non-reserved identifier

RAngle 🔒

There are some lexing ambiguities with >> because it can represet both a right shift or two closing angle brackets (e.g., Vec<Option<i32>>). We solve the ambiguity by giving > a special token if it’s immediately followed by another >, i.e., >> is tokenized as TokenKind::GtFollowedByGt followed by TokenKind::Gt.

Enums

Expected

See PeekExpected

Traits

Peek 🔒

A trait for testing whether a token matches a rule.

PeekExpected 🔒

A subtrait of Peek for rules that have an expected description.