Class: Liquid2::Expression

Inherits:

Object

• Object
• Liquid2::Expression

Defined in:

lib/liquid2/expression.rb

Overview

Base class for all expressions.

Direct Known Subclasses

ArithmeticExpression, ArrayLiteral, ArraySpread, Blank, BooleanExpression, ComparisonExpression, Empty, Filter, FilteredExpression, GroupedExpression, Identifier, KeywordArgument, Lambda, LogicalAnd, LogicalNot, LogicalOr, LoopExpression, Negative, ObjectLiteral, ObjectLiteralItem, Parameter, Path, Positive, RangeExpression, TemplateString, TernaryExpression

Instance Attribute Summary

• #token ⇒ Object readonly

  Returns the value of attribute token.

Instance Method Summary

• #children ⇒ Object

  Return children of this expression.

• #evaluate(_context) ⇒ Object
• #initialize(token) ⇒ Expression constructor

  A new instance of Expression.

• #scope ⇒ Object

  Return variables this expression adds to the scope of any child expressions.

Constructor Details

#initialize(token) ⇒ Expression

Returns a new instance of Expression.

Parameters:

• token ([Symbol, String?, Integer])

# File 'lib/liquid2/expression.rb', line 9

def initialize(token)
  @token = token
end

Instance Attribute Details

#token ⇒ Object (readonly)

Returns the value of attribute token.

# File 'lib/liquid2/expression.rb', line 6

def token
  @token
end

Instance Method Details

#children ⇒ Object

Return children of this expression.

# File 'lib/liquid2/expression.rb', line 19

def children = []

#evaluate(_context) ⇒ Object

Parameters:

• context —

  RenderContext

# File 'lib/liquid2/expression.rb', line 14

def evaluate(_context)
  raise "all expressions must implement `evaluate: (RenderContext context) -> untyped`"
end

#scope ⇒ Object

Return variables this expression adds to the scope of any child expressions. Currently used by lambda expressions only.

# File 'lib/liquid2/expression.rb', line 23

def scope = nil