Class: JSONP3::Expression

Inherits:

Object

• Object
• JSONP3::Expression

Defined in:

lib/json_p3/filter.rb

Overview

Base class for all filter expression nodes.

Direct Known Subclasses

FilterExpression, FilterExpressionLiteral, FunctionExpression, InfixExpression, LogicalNotExpression, QueryExpression

Instance Attribute Summary

• #token ⇒ Object readonly

  Returns the value of attribute token.

Instance Method Summary

• #evaluate(_context) ⇒ Object

  Evaluate the filter expression in the given context.

• #initialize(token) ⇒ Expression constructor

  A new instance of Expression.

Constructor Details

#initialize(token) ⇒ Expression

Returns a new instance of Expression.

# File 'lib/json_p3/filter.rb', line 12

def initialize(token)
  @token = token
end

Instance Attribute Details

#token ⇒ Object (readonly)

Returns the value of attribute token.

# File 'lib/json_p3/filter.rb', line 10

def token
  @token
end

Instance Method Details

#evaluate(_context) ⇒ Object

Evaluate the filter expression in the given context.

# File 'lib/json_p3/filter.rb', line 17

def evaluate(_context)
  raise "filter expressions must implement `evaluate(context)`"
end