public Value Visit(EqualsExpr expr, Scope scope)
{
return(PerformOperation(expr.Left.Accept(this, scope),
expr.Right.Accept(this, scope),
(a, b) => a.Equals(b),
(a, b) => a == b,
(a, b) => a == b,
(a, b) => a == b));
}
public void EqualsTest(object a, object b, bool expected)
{
var target = new EvaluateVisitor();
var expr = new EqualsExpr(new ConstantExpr(a), new ConstantExpr(b));
var actual = target.Visit(expr, _scope);
Assert.AreEqual(expected, actual.ToBoolean());
}
public string Visit(EqualsExpr expr, Scope scope)
{
return(expr.Left.Accept(this, scope) + " == " + expr.Right.Accept(this, scope));
}
protected IType CheckExpr(EqualsExpr expr)
{
IType a = CheckExpr(expr.Expr1);
IType b = CheckExpr(expr.Expr2);
if (!a.CompatibleWith(b))
{
AddError(String.Format("Comparison using '==' not possible. Incompatible types: '{0}', '{1}'.",
a.ToString(), b.ToString()), true, expr.SourcePosition);
}
return BoolType.Instance;
}
public ValueType Visit(EqualsExpr expr, Scope scope)
{
return(BinaryOperatorTypeCheck(expr, scope));
}
public void EqualsTest(object a, object b, bool expected)
{
var target = new EvaluateVisitor();
var expr = new EqualsExpr( new ConstantExpr(a), new ConstantExpr(b));
var actual = target.Visit(expr, _scope);
Assert.AreEqual(expected, actual.ToBoolean());
}
