/// <summary>
/// Emits an expression method.
/// </summary>
/// <param name="emitter">A reference to an emitter.</param>
/// <param name="expressionMethod">A reference to the expression method.</param>
/// <param name="arguments">A reference to the argument stack.</param>
internal static void EmitMethod(this IEmitter emitter, MethodInfo expressionMethod, Stack <object> arguments)
{
if (expressionMethod.DeclaringType == typeof(IExpression) ||
expressionMethod.DeclaringType == typeof(IInitialiser) ||
expressionMethod.DeclaringType == typeof(ICondition) ||
expressionMethod.DeclaringType == typeof(IIterator))
{
if (expressionMethod.Name != "Value")
{
var method = SupportedMethods.FirstOrDefault(m => m.Name == expressionMethod.Name);
if (method == null)
{
throw new NotSupportedException($"OpCode '{expressionMethod.Name}' not supported");
}
var parameters = method.GetParameters();
//Console.WriteLine("expresionMethod: {0}, parameters: {1}", expressionMethod.Name, string.Join(", ", parameters.Select(p => p.ParameterType.Name)));
object[] values = new object[parameters.Length];
values[0] = emitter;
if (parameters.Length > 1)
{
for (int i = 1; i < parameters.Length; i++)
{
values[i] = arguments.Pop();
}
}
method.Invoke(null, values);
}
}
else
{
emitter.Call(expressionMethod);
}
}
public void EmitDeferredInstructions()
{
if (!_outputEnabled)
{
return;
}
foreach (MethodInstruction instruction in _deferredInstructions)
{
switch (instruction.OpCode)
{
case MethodOpCode.Assign:
_emitter.Store((IrisType)instruction.Operand);
break;
case MethodOpCode.BranchCond:
_emitter.BranchCondition(instruction.Condition, (int)instruction.Operand);
break;
case MethodOpCode.BranchFalse:
_emitter.BranchFalse((int)instruction.Operand);
break;
case MethodOpCode.BranchTrue:
_emitter.BranchTrue((int)instruction.Operand);
break;
case MethodOpCode.Call:
_emitter.Call((Symbol)instruction.Operand);
break;
case MethodOpCode.Goto:
_emitter.Goto((int)instruction.Operand);
break;
case MethodOpCode.Label:
_emitter.Label((int)instruction.Operand);
break;
case MethodOpCode.Load:
_emitter.Load((IrisType)instruction.Operand);
break;
case MethodOpCode.LoadElem:
_emitter.LoadElement((IrisType)instruction.Operand);
break;
case MethodOpCode.LoadElemA:
_emitter.LoadElementAddress((IrisType)instruction.Operand);
break;
case MethodOpCode.Operator:
_emitter.Operator((Operator)instruction.Operand);
break;
case MethodOpCode.Dup:
_emitter.Dup();
break;
case MethodOpCode.Pop:
_emitter.Pop();
break;
case MethodOpCode.PushArg:
_emitter.PushArgument((int)instruction.Operand);
break;
case MethodOpCode.PushArgA:
_emitter.PushArgumentAddress((int)instruction.Operand);
break;
case MethodOpCode.PushInt:
_emitter.PushIntConst((int)instruction.Operand);
break;
case MethodOpCode.PushGbl:
_emitter.PushGlobal((Symbol)instruction.Operand);
break;
case MethodOpCode.PushGblA:
_emitter.PushGlobalAddress((Symbol)instruction.Operand);
break;
case MethodOpCode.PushLoc:
_emitter.PushLocal((int)instruction.Operand);
break;
case MethodOpCode.PushLocA:
_emitter.PushLocalAddress((int)instruction.Operand);
break;
case MethodOpCode.PushString:
_emitter.PushString((string)instruction.Operand);
break;
case MethodOpCode.StoreArg:
_emitter.StoreArgument((int)instruction.Operand);
break;
case MethodOpCode.StoreElem:
_emitter.StoreElement((IrisType)instruction.Operand);
break;
case MethodOpCode.StoreGbl:
_emitter.StoreGlobal((Symbol)instruction.Operand);
break;
case MethodOpCode.StoreLoc:
_emitter.StoreLocal((int)instruction.Operand);
break;
default:
throw new InvalidOperationException("Unknown opcode. Missing case?");
}
}
_deferredInstructions.Clear();
}
/// <summary>
/// Emits a type converter.
/// </summary>
/// <param name="methodIL">An emitter.</param>
/// <param name="fromType">The type to convert from.</param>
/// <param name="toType">The type to convert to.</param>
/// <returns>The emitter.</returns>
public static IEmitter EmitConverter(this IEmitter methodIL, Type fromType, Type toType)
{
if (fromType == toType)
{
return(methodIL);
}
if (toType == typeof(string))
{
if (fromType == typeof(byte[]))
{
var toBase64Method = typeof(Convert).GetMethod("ToBase64String", new[] { typeof(byte[]) });
return(methodIL.Call(toBase64Method));
}
var toStringMethod = typeof(Convert).GetMethod("ToString", new[] { fromType });
return(methodIL.Call(toStringMethod));
}
if (toType == typeof(byte[]))
{
if (fromType == typeof(string))
{
var fromBase64Method = typeof(Convert).GetMethod("FromBase64String", new[] { typeof(string) });
return(methodIL.Call(fromBase64Method));
}
methodIL.ThrowException(typeof(NotSupportedException));
return(methodIL);
}
else if (toType == typeof(short))
{
var toMethod = typeof(Convert).GetMethod("ToInt16", new[] { fromType });
return(methodIL.Call(toMethod));
}
else if (toType == typeof(int))
{
var toMethod = typeof(Convert).GetMethod("ToInt32", new[] { fromType });
return(methodIL.Call(toMethod));
}
else if (toType == typeof(long))
{
var toMethod = typeof(Convert).GetMethod("ToInt64", new[] { fromType });
return(methodIL.Call(toMethod));
}
else if (toType == typeof(float))
{
var toMethod = typeof(Convert).GetMethod("ToFloat", new[] { fromType });
return(methodIL.Call(toMethod));
}
else if (toType == typeof(double))
{
var toMethod = typeof(Convert).GetMethod("ToDouble", new[] { fromType });
return(methodIL.Call(toMethod));
}
else if (toType == typeof(bool))
{
var toMethod = typeof(Convert).GetMethod("ToBoolean", new[] { fromType });
return(methodIL.Call(toMethod));
}
else if (toType == typeof(DateTime))
{
var toMethod = typeof(Convert).GetMethod("ToDateTime", new[] { fromType });
return(methodIL.Call(toMethod));
}
methodIL.ThrowException(typeof(NotSupportedException));
return(methodIL);
}
