module Malady::Evaluator
Public Instance Methods
eval_ast(env, ast)
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# File lib/malady/evaluator.rb, line 27 def eval_ast(env, ast) type = ast.first rest = ast[1..-1] case type when :symbol env[ast[1]] when :list result = [:list] result + rest.map { |ast| evaluate(env, ast) } when :integer ast[1] else ast end end
eval_with_repl_env(ast)
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# File lib/malady/evaluator.rb, line 17 def eval_with_repl_env(ast) repl_env = { '+' => lambda { |x, y| x + y }, '-' => lambda { |x, y| x - y }, '/' => lambda { |x, y| Integer(x / y) }, '*' => lambda { |x, y| x * y } } evaluate(repl_env, ast) end
evaluate(env, ast)
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# File lib/malady/evaluator.rb, line 4 def evaluate(env, ast) type = ast.first rest = ast[1..-1] if type == :list evaluated_list = eval_ast(env, ast) fn = evaluated_list[1] args = evaluated_list[2..-1] fn.call(*args) else eval_ast(env, ast) end end