Class: Ibex::Runtime::CST::GreenToken

Inherits:
Object
  • Object
show all
Defined in:
lib/ibex/runtime/cst/green/token.rb

Overview

Immutable position-independent terminal occurrence.

Constant Summary collapse

EMPTY_TRIVIA =

: Array

empty_trivia.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(kind:, text:, leading: EMPTY_TRIVIA, trailing: EMPTY_TRIVIA, flags: 0, expected_kind: nil) ⇒ GreenToken

Returns a new instance of GreenToken.



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# File 'lib/ibex/runtime/cst/green/token.rb', line 28

def initialize(
  kind:, text:, leading: EMPTY_TRIVIA, trailing: EMPTY_TRIVIA, flags: 0, expected_kind: nil
)
  @kind = kind
  @text = text.encoding == Encoding::BINARY && text.frozen? ? text : text.b.freeze
  @leading = leading.frozen? ? leading : leading.dup.freeze
  @trailing = trailing.frozen? ? trailing : trailing.dup.freeze
  @flags = flags
  @expected_kind = expected_kind
  @leading_width = trivia_width(@leading)
  @trailing_width = trivia_width(@trailing)
  @full_width = @leading_width + @text.bytesize + @trailing_width
  @hash = @kind.hash ^ @text.hash ^ @leading.hash ^ @trailing.hash ^ @flags.hash ^ @expected_kind.hash
  freeze
end

Instance Attribute Details

#expected_kind ⇒ Object (readonly)

: Integer?



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# File 'lib/ibex/runtime/cst/green/token.rb', line 23

def expected_kind
  @expected_kind
end

#flags ⇒ Object (readonly)

: Integer



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# File 'lib/ibex/runtime/cst/green/token.rb', line 19

def flags
  @flags
end

#full_width ⇒ Object (readonly)

: Integer



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# File 'lib/ibex/runtime/cst/green/token.rb', line 20

def full_width
  @full_width
end

#hash ⇒ Object (readonly)

: Integer



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# File 'lib/ibex/runtime/cst/green/token.rb', line 24

def hash
  @hash
end

#kind ⇒ Object (readonly)

: Integer



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# File 'lib/ibex/runtime/cst/green/token.rb', line 15

def kind
  @kind
end

#leading ⇒ Object (readonly)

: Array



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# File 'lib/ibex/runtime/cst/green/token.rb', line 17

def leading
  @leading
end

#leading_width ⇒ Object (readonly)

: Integer



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# File 'lib/ibex/runtime/cst/green/token.rb', line 21

def leading_width
  @leading_width
end

#text ⇒ Object (readonly)

: String



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# File 'lib/ibex/runtime/cst/green/token.rb', line 16

def text
  @text
end

#trailing ⇒ Object (readonly)

: Array



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# File 'lib/ibex/runtime/cst/green/token.rb', line 18

def trailing
  @trailing
end

#trailing_width ⇒ Object (readonly)

: Integer



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# File 'lib/ibex/runtime/cst/green/token.rb', line 22

def trailing_width
  @trailing_width
end

Class Method Details

.lexical_error(kind:, text:, leading: []) ⇒ Object 



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# File 'lib/ibex/runtime/cst/green/token.rb', line 53

def self.lexical_error(kind:, text:, leading: [])
  new(kind: kind, text: text, leading: leading, flags: Flags::CONTAINS_ERROR)
end

.missing(kind:, expected_kind:) ⇒ Object 



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# File 'lib/ibex/runtime/cst/green/token.rb', line 45

def self.missing(kind:, expected_kind:)
  new(
    kind: kind, text: "", expected_kind: expected_kind,
    flags: Flags::CONTAINS_MISSING | Flags::SYNTHETIC
  )
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



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# File 'lib/ibex/runtime/cst/green/token.rb', line 70

def ==(other)
  other.is_a?(GreenToken) &&
    @kind == other.kind &&
    @text == other.text &&
    @leading == other.leading &&
    @trailing == other.trailing &&
    @flags == other.flags &&
    @expected_kind == other.expected_kind
end

#descendant_count ⇒ Object 



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# File 'lib/ibex/runtime/cst/green/token.rb', line 58

def descendant_count = 1

#to_source ⇒ Object 



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# File 'lib/ibex/runtime/cst/green/token.rb', line 61

def to_source
  source = String.new(encoding: Encoding::BINARY)
  @leading.each { |trivia| source << trivia.text }
  source << @text
  @trailing.each { |trivia| source << trivia.text }
  source
end