Class: ORB::AST::ControlExpressionNode

Inherits:
AbstractNode show all
Defined in:
lib/orb/ast/control_expression_node.rb

Overview

A node representing a non-printing expression Non-printing expressions are used for control flow and variable assignment. Any output from a non-printing expression is captured and discarded.

Constant Summary collapse

BLOCK_RE = 
/\A(if|unless)\b|\bdo\s*(\|[^|]*\|)?\s*$/

Constants inherited from AbstractNode

AbstractNode::EMPTY_ARRAY

Instance Attribute Summary collapse

Attributes inherited from AbstractNode

#attributes, #children, #errors

Instance Method Summary collapse

Methods inherited from AbstractNode

#==, #add_child, #add_error, #render

Constructor Details

#initialize(token) ⇒ ControlExpressionNode

Returns a new instance of ControlExpressionNode.



13
14
15
16
17
18
 
# File 'lib/orb/ast/control_expression_node.rb', line 13

def initialize(token)
  super
  @expression = token.value
  @is_block = BLOCK_RE.match?(@expression)
  @is_end = @expression == 'end' || @expression.strip == 'end'
end

Instance Attribute Details

#expression ⇒ Object (readonly)

Returns the value of attribute expression.



11
12
13
 
# File 'lib/orb/ast/control_expression_node.rb', line 11

def expression
  @expression
end

Instance Method Details

#block? ⇒ Boolean

Returns:

  • (Boolean) 


20
21
22
 
# File 'lib/orb/ast/control_expression_node.rb', line 20

def block?
  @is_block
end

#end? ⇒ Boolean

Returns:

  • (Boolean) 


24
25
26
 
# File 'lib/orb/ast/control_expression_node.rb', line 24

def end?
  @is_end
end