class Minjs::ECMA262::StForInVar
Base
class of ECMA262
‘for(var in)’ IterationStatement element.
@see www.ecma-international.org/ecma-262 ECMA262
12.6.4
Attributes
exp2[R]
statement[R]
var_decl[R]
var_env[R]
Public Class Methods
new(var_env, var_decl, exp2, statement)
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# File lib/minjs/ecma262/statement.rb, line 918 def initialize(var_env, var_decl, exp2, statement) @var_env = var_env @var_decl = var_decl @exp2 = exp2 @statement = statement end
Public Instance Methods
==(obj)
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compare object
# File lib/minjs/ecma262/statement.rb, line 962 def ==(obj) self.class == obj.class and @var_decl == obj.var_decl and @exp2 == obj.exp2 and @statement == obj.statement end
add_paren()
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add parenthesis if need
# File lib/minjs/ecma262/statement.rb, line 999 def add_paren self end
deep_dup()
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duplicate object @see Base#deep_dup
# File lib/minjs/ecma262/statement.rb, line 927 def deep_dup self.class.new(@var_env, [@var_decl[0].deep_dup, @var_decl[1] ? @var_decl[1].deep_dup : nil], @exp2.deep_dup, @statement.deep_dup) end
remove_paren()
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remove parenthesis if possible
# File lib/minjs/ecma262/statement.rb, line 988 def remove_paren if @var_decl[1] and @var_decl[1].kind_of? ExpParen @var_decl[1] = @var_decl[1].val end if @exp2.kind_of? ExpParen @exp2 = @exp2.val end self end
replace(from, to)
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Replaces children object. @see Base#replace
# File lib/minjs/ecma262/statement.rb, line 945 def replace(from, to) if from .eql? @statement @statement = to end end
to_js(options = {})
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Returns a ECMAScript string containg the representation of element. @see Base#to_js
# File lib/minjs/ecma262/statement.rb, line 971 def to_js(options = {}) if @statement.kind_of? StBlock and @statement.statement_list.length == 1 statement = @statement.statement_list.statement_list[0] else statement = @statement end if @var_decl[1] #with initialiser _var_decl = concat(options, @var_decl[0], '=', @var_decl[1]) else _var_decl = concat(options, @var_decl[0]) end concat options, :for, "(", :var, _var_decl, :in, @exp2, ")", statement end
to_st_for_in()
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converts for-in-var-statement to for-var-statement
# File lib/minjs/ecma262/statement.rb, line 952 def to_st_for_in if @var_decl[1] t = ExpAssign.new(@var_decl[0], @var_decl[1]) else t = @var_decl[0] end StForIn.new(t, @exp2, @statement) end
traverse(parent) { |parent, self| ... }
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Traverses this children and itself with given block.
# File lib/minjs/ecma262/statement.rb, line 935 def traverse(parent, &block) @var_decl[0].traverse(self, &block) @var_decl[1].traverse(self, &block) if @var_decl[1] @exp2.traverse(self, &block) @statement.traverse(self, &block) yield parent, self end