System.Delegate Compile(TypeContext context, System.Type returnType, System.Type[] types, ParameterInfo[] parameters, System.Type delType)
{
var names = Parameters.Map(para => para.Name).AddFirst("closure");
// Emit First Argument
var lamdaVisit = new LamdaVisitor(names);
Body.Accept(lamdaVisit);
var parameterTypes = types.AddFirst(typeof(Runtime.Closure));
var method = new System.Reflection.Emit.DynamicMethod(Name, returnType, parameterTypes, true);
var methodGen = new Generators.DynamicMethodGenerator(method, parameters, null)
{
SyntaxBody = Body,
Context = context
};
methodGen.EmitParameterInfo();
var bodyGen = new MethodBodyGenerator(methodGen, method.GetILGenerator());
object[] values = new object[lamdaVisit.HoistedLocals.Count];
if (values.Length > 0)
{
int index = 0;
var field = typeof(Runtime.Closure).GetField("Values");
foreach (var item in lamdaVisit.HoistedLocals)
{
var value = item.Value;
values[index] = value.Accept(ScriptCompiler.Instance);
// if binder is null variable or member may not exist
if (value.NodeType == ExpressionType.Identifier && ((NameExpression)value).Binder is null)
{
continue;
}
var variable = bodyGen.DeclareVariable(value.Type, item.Key);
// load closure argument
bodyGen.LoadArgument(0);
bodyGen.LoadField(field);
bodyGen.LoadInt32(index);
bodyGen.LoadArrayElement(typeof(object));
bodyGen.UnboxObject(value.Type);
bodyGen.StoreVariable(variable);
index++;
}
}
bodyGen.Compile();
return(method.CreateDelegate(delType, new Runtime.Closure(values)));
}
public override void GenerateCode(MethodBodyGenerator generator, MethodCompileOption option)
{
var target = generator.Method.DeclaringType;
IExpressionVisitor <object> visitor = ScriptCompiler.Instance;
//pass scoped arguments // refer System.Linq.Expression.Compiler folder
var names = Parameters.Map(para => para.Name);
// Emit First Argument
var lamdaVisit = new LamdaVisitor(names);
Body.Accept(lamdaVisit);
LamdaGen lamdaGen;
if (generator.Method.DeclaringType is Generators.TypeGenerator typeGen)
{
lamdaGen = typeGen.DefineAnonymousMethod(Types, ReturnType);
}
else
{
lamdaGen = AssemblyGen.DynamicAssembly.DefineAnonymousMethod(Types, ReturnType);
}
var methodGen = new Generators.MethodGenerator(lamdaGen.Method, ParameterInfos, lamdaGen.Type)
{
SyntaxBody = Body,
Context = generator.Context
};
methodGen.EmitParameterInfo();
var bodyGen = new MethodBodyGenerator(methodGen, lamdaGen.Method.GetILGenerator());
var values = lamdaVisit.HoistedLocals.Values;
// new object[] {}
var valVar = generator.DeclareVariable(LamdaGen.ObjectArray);
ArrayListExpression.MakeObjectArray(generator, values);
generator.StoreVariable(valVar);
if (values.Count > 0)
{
int index = 0;
var field = lamdaGen.Values;
foreach (var item in lamdaVisit.HoistedLocals)
{
var value = item.Value;
var variable = bodyGen.DeclareVariable(value.Type, item.Key);
bodyGen.LoadArgument(0);
bodyGen.LoadField(field);
bodyGen.LoadInt32(index);
bodyGen.LoadArrayElement(TypeProvider.ObjectType);
bodyGen.UnboxObject(value.Type);
bodyGen.StoreVariable(variable);
index++;
}
}
bodyGen.Compile();
var type = lamdaGen.CreateType();
generator.LoadVariable(valVar);
if (generator.Method is Generators.DynamicMethodGenerator)
{
generator.NewObject(type.GetConstructor(LamdaGen.CtorSignature));
generator.LoadFunction(type.GetMethod(ReflectionUtils.InvokeMethod, System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic), Type);
}
else
{
generator.NewObject(lamdaGen.Constructor);
generator.LoadFunction(lamdaGen.Method, Type);
}
}
//todo working on scope for better emit
public System.Delegate Compile(System.Type target, IExpressionVisitor <object> visitor)
{
//pass scoped arguments // refer System.Linq.Expression.Compiler folder
var context = TypeContext.Default;
System.Type returnType;
if (ReturnSyntax != null)
{
returnType = ReturnSyntax.ResolveType(context);
}
else
{
returnType = TypeProvider.AnyType;
}
var names = Parameters.Map(para => para.Name).AddFirst("closure");
int length = Parameters.Count;
System.Type[] types = new System.Type[length];
var parameters = new ParameterInfo[length];
for (int i = 0; i < Parameters.Count; i++)
{
var para = Parameters[i];
System.Type type = para.Type == null ? TypeProvider.AnyType : para.Type.ResolveType(context);
parameters[i] = new ParameterInfo(para.Name, i + 1, type, para.IsVarArgs);
types[i] = type;
}
// Emit First Argument
var lamdaVisit = new LamdaVisitor(names);
Body.Accept(lamdaVisit);
var parameterTypes = types.AddFirst(typeof(Closure));
var method = new System.Reflection.Emit.DynamicMethod("lambda_method", returnType, parameterTypes, true);
var methodGen = new Generators.DynamicMethodGenerator(method, parameters, target)
{
SyntaxBody = Body,
Context = context
};
methodGen.EmitParameterInfo();
var bodyGen = new MethodBodyGenerator(methodGen, method.GetILGenerator());
object[] values = new object[lamdaVisit.HoistedLocals.Count];
if (values.Length > 0)
{
int index = 0;
var field = typeof(Closure).GetField("Values");
foreach (var item in lamdaVisit.HoistedLocals)
{
var value = item.Value;
values[index] = value.Accept(visitor);
var variable = bodyGen.DeclareVariable(value.Type, item.Key);
bodyGen.LoadArgument(0);
bodyGen.LoadField(field);
bodyGen.LoadInt32(index);
bodyGen.LoadArrayElement(typeof(object));
bodyGen.UnboxObject(value.Type);
bodyGen.StoreVariable(variable);
index++;
}
}
bodyGen.Compile();
var delgateType = DelegateGen.MakeNewDelegate(types, returnType);
Type = delgateType;
return(method.CreateDelegate(delgateType, new Runtime.Closure(values)));
}