Module: Tweezer::ASTHelper

Included in:
Gem, Gemfile
Defined in:
lib/tweezer/ast_helper.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.append_block_child(block, node) ⇒ Object 



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# File 'lib/tweezer/ast_helper.rb', line 46

def append_block_child(block, node)
  new_children = block.children[0..1]
  old_child = block.children[2]

  if old_child.type == :begin
    new_children << old_child.append(node)
  else
    new_children << s(:begin, old_child, node)
  end

  block.updated(nil, new_children)
end

.block?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tweezer/ast_helper.rb', line 11

def block?(node)
  node.type == :block
end

.block_children(node) ⇒ Object 



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# File 'lib/tweezer/ast_helper.rb', line 27

def block_children(node)
  child = node.children[2]
  children = child.type == :begin ? child.children : [child]
  return children unless block_given?
  children.each { |c| yield c }
end

.group_block?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tweezer/ast_helper.rb', line 21

def group_block?(node)
  block?(node) &&
    node.children[0].type == :send &&
    node.children[0].children[1] == :group
end

.groups_from_group_block(node) ⇒ Object 



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# File 'lib/tweezer/ast_helper.rb', line 34

def groups_from_group_block(node)
  node.children[0].children[2..-1].flat_map(&:children)
end

.s(type, *children) ⇒ Object 



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# File 'lib/tweezer/ast_helper.rb', line 3

def s(type, *children)
  Parser::AST::Node.new(type, children)
end

.source_block?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tweezer/ast_helper.rb', line 15

def source_block?(node)
  block?(node) &&
    node.children[0].type == :send &&
    node.children[0].children[1] == :source
end

.unparse_hash_node(node) ⇒ Object 



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# File 'lib/tweezer/ast_helper.rb', line 38

def unparse_hash_node(node)
  return {} unless node
  fail ArgumentError unless node.type == :hash
  Hash[node.children.map do |child|
    [child.children[0].children[0], child.children[1]]
  end]
end

Instance Method Details

#blank_line ⇒ Object 



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# File 'lib/tweezer/ast_helper.rb', line 7

def blank_line
  Parser::AST::Node.new(:blank_line)
end