/// <summary>Declare an arg variable at the start of the args set.</summary>
internal ArgVariable DeclareHoisted(string name, Type type)
{
// Create it:
ArgVariable arg = new ArgVariable(name);
// Set the type:
arg.Type = type;
// Add a blank arg to the end of the set:
Arguments.Add(null);
// Time to shift all the args over except for 'this' (arg 0)!
for (int i = Arguments.Count - 1; i > 0; i--)
{
// Get it:
ArgVariable currentArg = Arguments[i];
// Update the index:
currentArg.ArgumentID = i + 1;
// Set it back:
Arguments[i + 1] = currentArg;
}
// Declare the arg in the scope:
(InitialScope as DeclarativeScope).Declare(arg);
return(arg);
}
/// <summary>Gets the compiled function for the given args set. Note that this args set
/// is the actual types and always includes the 'this' keywords type.</summary>
public Library.UserDefinedFunction GetCompiled(Type[] args, ScriptEngine engine, bool isConstructor)
{
int genCount = GeneratedMethods.Count;
for (int i = 0; i < genCount; i++)
{
if (GeneratedMethods[i].ArgsEqual(args))
{
// Got a match! Already compiled it.
return(GeneratedMethods[i]);
}
}
// Need to compile it now with our given arg types.
int argCount = args == null?0:args.Length;
// The source contains a fixed number of args; it goes up to this:
int maxArg = Arguments.Count;
// First, map args to a block of ArgVariable objects:
ArgVariable[] argsSet = new ArgVariable[argCount];
for (int i = 0; i < argCount; i++)
{
// Setup the arg variable:
ArgVariable curArg;
if (i < maxArg)
{
// Use the existing args object so it correctly updates in the scope:
curArg = Arguments[i];
}
else
{
// Need to create a fake one:
curArg = new ArgVariable("@unused-arg-" + i);
}
// Apply type (a little different here as we have to account for null too):
curArg.RawType = args[i];
// Apply to set:
argsSet[i] = curArg;
}
// If we're passing less args than the source supports, update the types of those unused args to being 'Undefined':
for (int i = argCount; i < maxArg; i++)
{
Arguments[i].Type = typeof(Nitrassic.Undefined);
}
// Create info:
OptimizationInfo info = new OptimizationInfo(engine);
info.IsConstructor = isConstructor;
// Generate it!
return(GenerateCode(argsSet, info));
}
/// <summary>Gets the compiled function for the given args set. Note that this args set
/// is the actual values and always includes the 'this' keywords value.</summary>
public Library.UserDefinedFunction GetCompiled(ScriptEngine engine, object[] args)
{
int genCount = GeneratedMethods.Count;
for (int i = 0; i < genCount; i++)
{
if (GeneratedMethods[i].ArgsEqual(args))
{
// Got a match! Already compiled it.
return(GeneratedMethods[i]);
}
}
// Need to compile it now with our given arg types.
int argCount = args.Length;
if (argCount > Arguments.Count)
{
// The actual source can only handle so many args.
argCount = Arguments.Count;
}
// First, map args to Arguments:
ArgVariable[] argsSet = new ArgVariable[argCount];
for (int i = 0; i < argCount; i++)
{
// Setup the arg variable:
ArgVariable curArg = new ArgVariable(Arguments[i].Name);
// Apply type:
curArg.Type = args[i].GetType();
// Apply to set:
argsSet[i] = curArg;
}
// Generate it!
return(GenerateCode(argsSet, new OptimizationInfo(engine)));
}
/// <summary>
/// Generates IL for the script.
/// </summary>
/// <param name="generator"> The generator to output the CIL to. </param>
/// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param>
protected override void GenerateCode(ArgVariable[] arguments, ILGenerator generator, OptimizationInfo optimizationInfo)
{
// Method signature: object FunctionDelegate(object thisObj, object[] arguments)
// Transfer the function name into the scope.
if (!string.IsNullOrEmpty(Name) &&
IncludeNameInScope &&
!HasArgument(Name) &&
optimizationInfo.MethodOptimizationHints.HasVariable(Name))
{
var functionName = new NameExpression(InitialScope, Name);
functionName.ApplyType(optimizationInfo, typeof(object));
functionName.GenerateSet(generator, optimizationInfo, false, typeof(object), delegate(bool two)
{
generator.LoadInt64(MethodID);
generator.Call(ReflectionHelpers.MethodLookup_Load);
if (two)
{
// Duplicate it:
generator.Duplicate();
}
}, false);
}
// Transfer the arguments object into the scope.
if (MethodOptimizationHints.HasArguments && !HasArgument("arguments"))
{
var argsSet = new NameExpression(this.InitialScope, "arguments");
argsSet.ApplyType(optimizationInfo, typeof(object));
argsSet.GenerateSet(generator, optimizationInfo, false, typeof(object), delegate(bool two)
{
// argumentValues
// Build an object[] from the arg values.
// Define an array:
int argCount = (arguments == null)?0 : arguments.Length;
generator.LoadInt32(argCount);
generator.NewArray(typeof(object));
for (int a = 0; a < argCount; a++)
{
// One of many args:
ArgVariable currentArg = arguments[a];
generator.Duplicate();
generator.LoadInt32(a);
currentArg.Get(generator);
EmitConversion.ToAny(generator, currentArg.Type);
generator.StoreArrayElement(typeof(object));
}
generator.NewObject(ReflectionHelpers.Arguments_Constructor);
if (two)
{
generator.Duplicate();
}
}, false);
}
// Temp cache return var/target:
var retVar = optimizationInfo.ReturnVariable;
var retTarg = optimizationInfo.ReturnTarget;
optimizationInfo.ReturnVariable = null;
optimizationInfo.ReturnTarget = null;
// Initialize any declarations.
(this.InitialScope as DeclarativeScope).GenerateDeclarations(generator, optimizationInfo);
// Generate code for the body of the function.
this.AbstractSyntaxTree.GenerateCode(generator, optimizationInfo);
// Define the return target - this is where the return statement jumps to.
// ReturnTarget can be null if there were no return statements.
if (optimizationInfo.ReturnTarget != null)
{
generator.DefineLabelPosition(optimizationInfo.ReturnTarget);
}
// Load the return value. If the variable is null, there were no return statements.
if (optimizationInfo.ReturnVariable != null)
{
// Return the value stored in the variable. Will be null if execution hits the end
// of the function without encountering any return statements.
generator.LoadVariable(optimizationInfo.ReturnVariable);
}
// Restore:
optimizationInfo.ReturnVariable = retVar;
optimizationInfo.ReturnTarget = retTarg;
}
