void PrintCode(CodeCompileUnit[] units, TextWriter writer)
{
var gen = new Generator();
var options = new CodeGeneratorOptions { IndentString = " " };
try
{
foreach (var unit in units)
gen.GenerateCodeFromCodeObject(unit, writer, options);
}
catch (Exception e)
{
Console.Error.WriteLine(e.Message);
}
}
private Type EmitMethodInvoke(CodeMethodInvokeExpression invoke)
{
Depth++;
Debug("Emitting method " + invoke.Method.MethodName);
MethodInfo target = null;
Type[] types = null;
#region Lookup target function
MethodInfo actual = null;
if (invoke.Method.TargetObject != null)
{
target = GetMethodInfo(invoke.Method);
if (Mirror != null)
{
actual = Mirror.GrabMethod(target);
}
}
// Case insensitive method search in local scope
if (target == null)
{
foreach (var name in Methods.Keys)
{
if (invoke.Method.MethodName.Equals(name, StringComparison.OrdinalIgnoreCase))
{
invoke.Method.MethodName = name;
}
}
}
// First we check the local methods
if (target == null && Methods.ContainsKey(invoke.Method.MethodName))
{
types = ParameterTypes[invoke.Method.MethodName];
target = Methods[invoke.Method.MethodName].Method;
}
// Then the methods provided by rusty
if (target == null)
{
target = Lookup.BestMatch(invoke.Method.MethodName, invoke.Parameters.Count);
if (Mirror != null)
{
actual = Mirror.GrabMethod(target);
}
}
// Lastly, the native methods
if (target == null && invoke.Method.TargetObject != null)
{
target = GetMethodInfo(invoke.Method);
if (Mirror != null)
{
actual = Mirror.GrabMethod(target);
}
}
if (target == null)
{
throw new CompileException(invoke, "Could not look up method " + invoke.Method.MethodName);
}
bool hasParams = false;
if (types == null) // Rusty-defined or native method
{
ParameterInfo[] Params = target.GetParameters();
types = new Type[Params.Length];
for (int i = 0; i < Params.Length; i++)
{
types[i] = Params[i].ParameterType;
}
hasParams = types.Length == 0 ? false : types[types.Length - 1] == typeof(object[]);
}
#endregion Lookup target function
#region Emit parameters
int p = 0;
var ByRef = new Dictionary <LocalBuilder, CodeExpression>();
for (p = 0; p < invoke.Parameters.Count; p++)
{
Depth++;
Debug("Emitting parameter " + p);
// Collapse superfluous arguments in array if last argument is object[]
// _and_ it's not a call into a user-defined function.
if (hasParams)
{
if (p == types.Length - 1)
{
Type Generated = EmitExpression(invoke.Parameters[p]);
// If the last argument is object[], we don't bother about params
if (Generated == typeof(object[]))
{
break;
}
LocalBuilder Temp = Generator.DeclareLocal(typeof(object));
ForceTopStack(Generated, typeof(object));
Generator.Emit(OpCodes.Stloc, Temp);
EmitArrayCreation(typeof(object), invoke.Parameters.Count - p);
Generator.Emit(OpCodes.Dup);
Generator.Emit(OpCodes.Ldc_I4, 0);
Generator.Emit(OpCodes.Ldloc, Temp);
Generator.Emit(OpCodes.Stelem_Ref);
Depth--;
continue;
}
else if (p > types.Length - 1)
{
EmitArrayInitializer(typeof(object), invoke.Parameters[p], p - types.Length + 1);
Depth--;
continue;
}
}
if (p < types.Length)
{
Type Generated = EmitExpression(invoke.Parameters[p]);
if (types[p].IsByRef)
{
// Variables passed by reference need to be stored in a local
Debug("Parameter " + p + " was by reference");
LocalBuilder Temporary = Generator.DeclareLocal(types[p].GetElementType());
ForceTopStack(typeof(object), types[p].GetElementType());
Generator.Emit(OpCodes.Stloc, Temporary);
Generator.Emit(OpCodes.Ldloca_S, Temporary);
if (invoke.Parameters[p] is CodeArrayIndexerExpression)
{
ByRef.Add(Temporary, invoke.Parameters[p]);
}
}
else
{
ForceTopStack(Generated, types[p]);
}
}
Depth--;
}
// Anything not specified pads to the default IL value
while (p < types.Length)
{
if (types[p].IsByRef)
{
Type NotRef = types[p].GetElementType();
EmitLiteral(NotRef, GetDefaultValue(target.GetParameters()[p]));
LocalBuilder Temporary = Generator.DeclareLocal(NotRef);
Generator.Emit(OpCodes.Stloc, Temporary);
Generator.Emit(OpCodes.Ldloca, Temporary);
}
else
{
EmitLiteral(types[p], GetDefaultValue(target.GetParameters()[p]));
}
p++;
}
#endregion Emit parameters
if (actual == null)
{
Generator.Emit(OpCodes.Call, target);
}
else
{
Generator.Emit(OpCodes.Call, actual);
}
#region Save back the variables
// Save the variables passed to reference back in Rusty's variable handling
foreach (var Builder in ByRef.Keys)
{
if (ByRef[Builder] is CodeArrayIndexerExpression)
{
var Ref = ByRef[Builder] as CodeArrayIndexerExpression;
Generator.Emit(OpCodes.Ldloc, VarsProperty);
EmitExpression(Ref.Indices[0]);
Generator.Emit(OpCodes.Ldloc, Builder);
if (Builder.LocalType != typeof(object))
{
ForceTopStack(Builder.LocalType, typeof(object));
}
Generator.Emit(OpCodes.Callvirt, SetVariable);
Generator.Emit(OpCodes.Pop);
}
}
#endregion Save back the variables
Depth--;
return(target.ReturnType);
}
