Module AST::Sexp
In: lib/ast/sexp.rb

This simple module is very useful in the cases where one needs to define deeply nested ASTs from Ruby code, for example, in tests. It should be used like this: 

    describe YourLanguage::AST do
      include Sexp

      it "should correctly parse expressions" do
        YourLanguage.parse("1 + 2 * 3").should ==
            s(:add,
              s(:integer, 1),
              s(:multiply,
                s(:integer, 2),
                s(:integer, 3)))
      end
    end

This way the amount of boilerplate code is greatly reduced.

Methods

s  

Public Instance methods

s(type, *children)

Creates a {Node} with type `type` and children `children`. Note that the resulting node is of the type AST::Node and not a subclass. This would not pose a problem with comparisons, as {Node#==} ignores metadata.

[Validate]