Rule

alpaca.Rule

trait Rule[R]

Represents a grammar rule in the parser.

A rule defines how a non-terminal symbol can be parsed by specifying one or more productions. Each production maps a pattern of symbols to a result value.

Rules are created using the rule function and can be used in pattern matching within parser productions.

Type parameters

R: the type of value produced when this rule is matched

Attributes

Experimental: true
Source: parser.scala
Graph
Supertypes: class Object

trait Matchable

class Any

Members list

Value members

Concrete methods

Pattern matching extractor for lists of this rule.

This is compile-time only and should only be used in parser rule definitions.

Attributes

Returns: a partial function that extracts a list of results
Source: parser.scala

Pattern matching extractor for optional occurrences of this rule.

This is compile-time only and should only be used in parser rule definitions.

Attributes

Returns: a partial function that extracts an optional result
Source: parser.scala

Pattern matching extractor for single occurrences of this rule.

This is compile-time only and should only be used in parser rule definitions.

Value parameters

x: the value to match

Attributes

Returns: Some(result) if the match succeeds
Source: parser.scala

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