/// <summary>
/// Gets the translated code for the grammar structure.
/// </summary>
/// <returns>The translated code for the grammar structure.</returns>
public IEnumerable <Block> Translate(TranslationContext context)
{
// Find method
MethodDeclaration customMethod = context.CurrentSprite.GetMethod(MethodName, Parameters.Count);
if (customMethod != null)
{
// Custom method found
// Don't check if returns value - it does not matter here
// TODO: inline
List <object> translatedParams = new List <object> {
customMethod.GetInternalName()
};
translatedParams.AddRange(Parameters.Select(x => x.Balance().Translate(context)));
for (int i = Parameters.Count; i < customMethod.Params.Count; i++)
{
translatedParams.Add(customMethod.Params[i].Default);
}
translatedParams.Add(new Block(BlockSpecs.GetParameter, Settings.StackRefParam));
translatedParams.Add(new Block(BlockSpecs.LengthOfList, Settings.StackIdentifier));
return(new[]
{ new Block(BlockSpecs.CustomMethodCall, translatedParams.ToArray()) });
}
// Custom method doesn't exist, so search inbuilt methods
if (InbuiltMethods.StandardMethods.TryGetValue(MethodName, out MethodSignature inbuiltMethod))
{
// Inbuilt method found
// Check method is not a reporter
if (inbuiltMethod.IsReporter)
{
context.ErrorList.Add(new CompilerError(
$"The inbuilt method '{MethodName}' can only be used as an input", ErrorType.ImproperUsage,
ErrorToken, FileName));
return(Enumerable.Empty <Block>());
}
// Check parameter count is valid
if (Parameters.Count == inbuiltMethod.Inputs.Length)
{
return new[]
{
new Block(inbuiltMethod.Name, Parameters.Select(x => x.Balance().Translate(context)).ToArray())
}
}
;
// Error: Invalid parameters
context.ErrorList.Add(new CompilerError(
$"Expected inputs '{string.Join("', '", inbuiltMethod.Inputs)}'", ErrorType.InvalidArgument,
ErrorToken, FileName));
return(Enumerable.Empty <Block>());
}
// Try non standard blocks
if (TranslateNonStandardMethod(context, false) is Block nonStandardMethod)
{
return new[] { nonStandardMethod }
}
;
// Error - nethod not found
context.ErrorList.Add(new CompilerError($"Method '{MethodName}' is not defined", ErrorType.NotDefined,
ErrorToken, FileName));
return(Enumerable.Empty <Block>());
}
/// <summary>
/// Gets the translated code for the grammar structure.
/// </summary>
/// <returns>The translated code for the grammar structure.</returns>
object ICompilable <object> .Translate(TranslationContext context)
{
// Find method
MethodDeclaration customMethod = context.CurrentSprite.GetMethod(MethodName, Parameters.Count);
if (customMethod != null)
{
// Custom method found
// Ensure it returns a value
if (!customMethod.HasReturn)
{
context.ErrorList.Add(new CompilerError($"Method '{MethodName}' does not return a value",
ErrorType.ImproperUsage, ErrorToken, FileName));
return(null);
}
// TODO: inline
// TODO: Optimise to not need additional stack value (except for repeat until)
List <object> translatedParams = new List <object> {
customMethod.GetInternalName()
};
translatedParams.AddRange(Parameters.Select(x => x.Translate(context)));
for (int i = Parameters.Count; i < customMethod.Params.Count; i++)
{
translatedParams.Add(customMethod.Params[i].Default);
}
translatedParams.Add(new Block(BlockSpecs.GetParameter, Settings.StackRefParam));
translatedParams.Add(new Block(BlockSpecs.LengthOfList, Settings.StackIdentifier));
context.Before.Add(new Block(BlockSpecs.CustomMethodCall, translatedParams.ToArray()));
StackValue returnValue = context.CurrentScope.CreateStackValue();
context.Before.Add(returnValue.CreateDeclaration(new Block(BlockSpecs.GetVariable,
customMethod.GetReturnVariableName())).First());
return(returnValue.CreateVariableLookup());
}
// Custom method doesn't exist, so search inbuilt methods
if (InbuiltMethods.StandardMethods.TryGetValue(MethodName, out MethodSignature inbuiltMethod))
{
// Inbuilt method found
// Check method is a reporter
if (!inbuiltMethod.IsReporter)
{
context.ErrorList.Add(new CompilerError(
$"The inbuilt method '{MethodName}' does not return a value", ErrorType.ImproperUsage,
ErrorToken, FileName));
return(new Block(null));
}
// Check parameter count is valid
if (Parameters.Count == inbuiltMethod.Inputs.Length)
{
return(new Block(inbuiltMethod.Name, Parameters.Select(x => x.Translate(context)).ToArray()));
}
// Parameter count not valid
context.ErrorList.Add(new CompilerError(
$"Expected inputs '{string.Join("', '", inbuiltMethod.Inputs)}'", ErrorType.InvalidArgument,
ErrorToken, FileName));
return(new Block(null));
}
// Try non standard blocks
object nonStandardMethod = TranslateNonStandardMethod(context, true);
if (nonStandardMethod != null)
{
return(nonStandardMethod);
}
// Error - nethod not found
context.ErrorList.Add(new CompilerError($"Method '{MethodName}' is not defined", ErrorType.NotDefined,
ErrorToken, FileName));
return(new Block(null));
}
/// <summary>
/// Gets the translated code for the grammar structure.
/// </summary>
/// <returns>The translated code for the grammar structure.</returns>
public IEnumerable <Block> Translate(TranslationContext context)
{
List <Block> output = new List <Block>();
// Create scope of loop
Scope innerScope = new Scope(context.CurrentScope);
TranslationContext newContext = new TranslationContext(innerScope, context);
// TODO: Inbuilt foreach block optimisation
// TODO: Inline foreach
// Create counter variable
StackValue internalCounter = context.CurrentScope.CreateStackValue();
output.AddRange(internalCounter.CreateDeclaration(1));
// Create item variable
StackValue itemVar = new StackValue(Variable, VarType, false);
innerScope.StackValues.Add(itemVar);
output.AddRange(itemVar.CreateDeclaration(VarType.GetDefault()));
List <Block> loopContents = new List <Block>();
GlobalListDeclaration globalList =
context.CurrentSprite.GetList(SourceName) ?? context.Project.GetList(SourceName);
StackValue arrayValue = null;
if (globalList != null)
{
// Translate loop contents
loopContents.Add(itemVar.CreateVariableAssignment(new Block(BlockSpecs.GetItemOfList,
internalCounter.CreateVariableLookup(), SourceName)));
}
else
{
// Get stackvalue for array
arrayValue = context.CurrentScope.Search(SourceName);
if (arrayValue == null)
{
context.ErrorList.Add(new CompilerError($"Array '{SourceName}' is not defined", ErrorType.NotDefined,
ErrorToken, FileName));
return(Enumerable.Empty <Block>());
}
loopContents.Add(itemVar.CreateVariableAssignment(arrayValue.CreateArrayLookup(internalCounter.CreateVariableLookup())));
}
// Increment counter
loopContents.Add(internalCounter.CreateVariableIncrement(1));
// Translate loop main body
foreach (IEnumerable <Block> translated in Statements.Select(x => x.Translate(newContext)))
{
loopContents.AddRange(translated);
}
// Create loop Scratch block
object repeats = globalList != null ? new Block(BlockSpecs.LengthOfList, SourceName) : (object)arrayValue.StackSpace;
output.Add(new Block(BlockSpecs.Repeat, repeats, loopContents.ToArray()));
// Clean up scope
output.AddRange(internalCounter.CreateDestruction());
output.AddRange(itemVar.CreateDestruction());
return(output);
}
