Module: Einstein

Defined in:

lib/einstein.rb,
lib/einstein/version.rb,
lib/einstein/evaluator.rb,
lib/einstein/processor.rb,
lib/einstein/expression.rb,
lib/einstein/parser.rex.rb,
lib/einstein/parser.racc.rb,
lib/einstein/pretty_printer.rb

Defined Under Namespace

Modules: VERSION Classes: Evaluator, Expression, Parser, PrettyPrinter, Processor, ResolveError

Class Method Summary

• .evaluate(expression, scope = {}) ⇒ Object

  Evaluate the given expression with the given scope.

• .parse(expression) ⇒ Object

  Parse the given expression and return the AST as an instance of Einstein::Expression.

Class Method Details

.evaluate(expression, scope = {}) ⇒ Object

Evaluate the given expression with the given scope. Any variables used by the expression, but undeclared in the scope, will cause a Einstein::ResolveError to be raised.

# File 'lib/einstein.rb', line 22

def self.evaluate(expression, scope = {})
  parse(expression).evaluate(scope)
end

.parse(expression) ⇒ Object

Parse the given expression and return the AST as an instance of Einstein::Expression.

# File 'lib/einstein.rb', line 15

def self.parse(expression)
  Expression.new(Parser.new.scan_str(expression))
end