Class: Pione::Lang::VariableBindingDeclaration

Inherits:
Declaration
  • Object
show all
Defined in:
lib/pione/lang/declaration.rb

Overview

VariableBindingDeclaration is a declaration for binding variable to expression.

Instance Method Summary collapse

Methods inherited from Declaration

#eval!, inherited

Methods included from Util::Positionable

#line_and_column, #pos, #set_source_position

Instance Method Details

#eval(env) ⇒ Object

Update variable table in the environment with the variable and bound expression. We expect +expr1+ is a variable or variable generating expression.



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# File 'lib/pione/lang/declaration.rb', line 63

def eval(env)
  var = get_reference(env, expr1, Variable)
  val = expr2

  # update variable table
  env.variable_set(var, val)
end