Class: Skeem::SkmBuilder

Inherits:

Rley::ParseRep::ASTBaseBuilder

Object
Rley::ParseRep::ASTBaseBuilder
Skeem::SkmBuilder

show all

Defined in:: lib/skeem/s_expr_builder.rb

Overview

The purpose of a ASTBuilder is to build piece by piece an AST (Abstract Syntax Tree) from a sequence of input tokens and visit events produced by walking over a GFGParsing object. Uses the Builder GoF pattern. The Builder pattern creates a complex object (say, a parse tree) from simpler objects (terminal and non-terminal nodes) and using a step by step approach.

Constant Summary collapse

Terminal2NodeClass =

{
  'BOOLEAN' => SkmBoolean,
  'CHAR' => SkmChar,
  'IDENTIFIER' => SkmIdentifier,
  'INTEGER' => SkmInteger,
  'RATIONAL' => SkmRational,
  'REAL' => SkmReal,
  'STRING_LIT' => SkmString
}.freeze