Lexeme

halotukozak.alpaca.internal.lexer.Lexeme
final class Lexeme[+Name <: ValidName, +Value] extends Selectable

A token matched in the input, as tokenize returns it: the token's name, its value, the matched text, and the lexer context's fields, read by name (lexeme.line when the context has a line field). In a signature, write a lexer's lexemes as MyLexer.Lexeme to keep those fields.

The context fields are a snapshot taken after the rule body ran, except that a tracked field, like line or column, keeps its value from before the match (even if the rule body assigned it), so it describes where the token starts.

Type parameters

Name

the token name type

Value

the value type

Value parameters

name

the token name

text

the matched text

value

the token's value: what the rule passed to Token["NAME"](value), or ()

Attributes

Source
Lexeme.scala
Graph
Supertypes
trait Selectable
class Object
trait Matchable
class Any

Members list

Type members

Types

type Fields <: AnyNamedTuple

The lexer context's fields, which the lexeme carries; a lexer's own lexemes have them as MyLexer.Lexeme.

The lexer context's fields, which the lexeme carries; a lexer's own lexemes have them as MyLexer.Lexeme.

Attributes

Source
Lexeme.scala

Value members

Concrete methods

override def equals(that: Any): Boolean

Compares the receiver object (this) with the argument object (that) for equivalence.

Compares the receiver object (this) with the argument object (that) for equivalence.

Any implementation of this method should be an equivalence relation:

  • It is reflexive: for any instance x of type Any, x.equals(x) should return true.
  • It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any instances x, y, and z of type Any if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is usually necessary to override hashCode to ensure that objects which are "equal" (o1.equals(o2) returns true) hash to the same scala.Int. (o1.hashCode.equals(o2.hashCode)).

Value parameters

that

the object to compare against this object for equality.

Attributes

Returns

true if the receiver object is equivalent to the argument; false otherwise.

Definition Classes
Any
Source
Lexeme.scala
override def hashCode: Int

Calculates a hash code value for the object.

Calculates a hash code value for the object.

The default hashing algorithm is platform dependent.

Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

Attributes

Returns

the hash code value for this object.

Definition Classes
Any
Source
Lexeme.scala
final def selectDynamic(name: String): Any

Backs context field selection by name (lexeme.NAME); not meant to be called directly.

Backs context field selection by name (lexeme.NAME); not meant to be called directly.

Attributes

Source
Lexeme.scala
override def toString: String

Returns a string representation of the object.

Returns a string representation of the object.

The default representation is platform dependent.

Attributes

Returns

a string representation of the object.

Definition Classes
Any
Source
Lexeme.scala

Concrete fields

val name: Name

Attributes

Source
Lexeme.scala
val text: String

Attributes

Source
Lexeme.scala
val value: Value

Attributes

Source
Lexeme.scala