tegral-niwen-parser/guru.zoroark.tegral.niwen.parser.expectations/ExpectedLookahead

ExpectedLookahead

class ExpectedLookahead<T>(lookaheadExpectations: List<Expectation<Nothing, *>>) : Expectation<T, Nothing> , HandlesTokenDrought

A "look-ahead" branch. Similar to lookaheads in regular expressions, ExpectedLookahead will verify expectations, but not advanced the "cursor" to the next token. You can think of it as check against "what will come next", while staying where we are.

Constructors

ExpectedLookahead

constructor(lookaheadExpectations: List<Expectation<Nothing, *>>)

Functions

matches

open override fun matches(context: ParsingContext, index: Int): ExpectationResult<T>

Check if this expectation matches the given context at the given index among the context's tokens list.

Properties

stateCallback

val stateCallback: StateCallback<T, Nothing, *>?

The name of the argument where the result of this expectation should be stored, or null if the matched value of this expectation should not or cannot be stored.

title

open override val title: String

Title of this expectation. This should be a shortened description of what this expectation is. For example, an expectation for a node could have the title expect(SomeNode). If possible and legible, this title should be similar to the DSL expression for creating the expectation