Module: Yadriggy::AstHelper

Included in:

ArrayLiteral, ArrayRef, BeginEnd, Binary, Break, Call, Conditional, ConstPathRef, Exprs, ForLoop, HashLiteral, Loop, ModuleDef, Parameters, Paren, Program, Rescue, Return, StringInterpolation, SymbolLiteral, Unary

Defined in:

lib/yadriggy/ast.rb

Overview

Helper module

Instance Method Summary

• #has_tag?(s, tag) ⇒ Array

  The S-expression if it starts with the tag.

• #to_node(s) ⇒ ASTnode

  An AST.

• #to_nodes(s) ⇒ Array<ASTnode>

  ASTs.

Instance Method Details

#has_tag?(s, tag) ⇒ Array

Returns the S-expression if it starts with the tag. Otherwise, raise an error.

Parameters:

• s (Array) —

  an S-expression.

• tag (Symbol)

Returns:

• (Array) —

  the S-expression if it starts with the tag. Otherwise, raise an error.

# File 'lib/yadriggy/ast.rb', line 304

def has_tag?(s, tag)
  raise "s-exp is not :#{tag.to_s}. #{s}" if !s.nil? && s[0] != tag
  s
end

#to_node(s) ⇒ ASTnode

Returns an AST.

Parameters:

• s (Array) —

  an S-expression.

Returns:

• (ASTnode) —

  an AST.

# File 'lib/yadriggy/ast.rb', line 291

def to_node(s) ASTree.to_node(s) end

#to_nodes(s) ⇒ Array<ASTnode>

Returns ASTs.

Parameters:

• s (Array) —

  an array of S-expression.

Returns:

• (Array<ASTnode>) —

  ASTs.

# File 'lib/yadriggy/ast.rb', line 295

def to_nodes(s)
  raise "not an array: #{s}" unless s.class == Array
  s.map {|e| ASTree.to_node(e) }
end