/// <inheritdoc/>
public override void Visit(VariableReferenceExpression variableReferenceExpression)
{
base.Visit(variableReferenceExpression);
var variableDeclaration = variableReferenceExpression.TypeInference.Declaration as Variable;
if (variableDeclaration == null)
{
result.Error("Unable to find variable [{0}]", variableReferenceExpression.Span, variableReferenceExpression);
}
else if (variableDeclaration.InitialValue == null || !variableDeclaration.Qualifiers.Contains(StorageQualifier.Const))
{
result.Error("Variable [{0}] used in expression is not constant", variableReferenceExpression.Span, variableDeclaration);
}
else
{
var evaluator = new ExpressionEvaluator();
var subResult = evaluator.Evaluate(variableDeclaration.InitialValue);
subResult.CopyTo(result);
if (subResult.HasErrors)
{
values.Push(0.0);
}
else
{
values.Push(subResult.Value);
}
}
}
/// <inheritdoc/>
public override void Visit(MethodInvocationExpression methodInvocationExpression)
{
if (methodInvocationExpression.Target is TypeReferenceExpression)
{
var methodName = (methodInvocationExpression.Target as TypeReferenceExpression).Type.Name.Text;
if (hlslScalarTypeNames.Contains(methodName))
{
var evaluator = new ExpressionEvaluator();
var subResult = evaluator.Evaluate(methodInvocationExpression.Arguments[0]);
values.Push(subResult.Value);
return;
}
}
result.Error("Method invocation expression evaluation [{0}] is not supported", methodInvocationExpression.Span, methodInvocationExpression);
}