private Expression CompilePredefinedConstantExpression()
{
PushPosition();
if (!IsWord)
{
ThrowException("Expect word.");
}
string name = GetWord();
Move();
object value = MathyConstants.GetValue(name);
if (value == null)
{
ThrowException(string.Format("Undefined constant {0}", name));
}
Expression expression = new PredefinedConstantExpression("#" + name, value, PeekPos(), Pos);
PopPosition();
return(expression);
}
private object EvalutePredefinedConstantExpression(PredefinedConstantExpression e, VariableContext context)
{
return(e.Value);
}
private void CheckPredefinedConstantExpression(PredefinedConstantExpression e, TypeCheckingContext context)
{
e.Type = e.Value.GetType();
}