/// <inheritdoc/>
public override void GenerateCode(MethodBodyGenerator generator, MethodCompileOption options)
{
if (Arguments != null)
{
var conversions = ArgumentConversions;
for (int i = 0; i < Arguments.Count; i++)
{
Arguments[i].GenerateCode(generator);
var conversion = conversions[i];
if (conversion != null)
{
generator.EmitConvert(conversion);
}
}
}
generator.NewObject(Constructor);
int length = Expressions.Count;
if (length > 0)
{
var variable = generator.DeclareVariable(Type);
generator.StoreVariable(variable);
generator.LoadVariable(variable);
var conversions = ArrayConversions;
generator.LoadInt32(length);
Type type = ElementType;
generator.NewArray(type);
for (int i = 0; i < length; i++)
{
generator.Duplicate();
generator.LoadInt32(i);
var expression = Expressions[i];
expression.GenerateCode(generator);
if (expression.Type.IsValueType && type.IsValueType == false)
{
generator.Box(expression.Type);
}
var convertion = conversions[i];
if (convertion != null)
{
generator.EmitConvert(convertion);
}
generator.StoreArrayElement(type);
}
var m = Type.GetMethod("AddRange", Utils.ReflectionUtils.PublicInstance);
generator.Call(m);
generator.LoadVariable(variable);
}
}
public void GenerateGet(Expression target, MethodBodyGenerator generator, MethodCompileOption option = MethodCompileOption.None)
{
if (target != null && target.Type.IsValueType)
{
generator.Box(target.Type);
}
generator.LoadString(Name);
generator.Call(typeof(IDynamicInvocable).GetInstanceMethod(nameof(IDynamicInvocable.SafeGetValue), typeof(string)));
// since it is a value type load the address
if ((option & MethodCompileOption.EmitStartAddress) == MethodCompileOption.EmitStartAddress)
{
var temp = generator.DeclareVariable(TypeProvider.AnyType);
generator.StoreVariable(temp);
generator.LoadAddressOfVariable(temp);
}
}
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)
{
if (Method.IsAbstract && Method.DeclaringType == typeof(IDynamicInvocable))
{
Target.GenerateCode(generator);
if (Target.Type.IsValueType)
{
generator.Box(Target.Type);
}
}
else
{
Target.GenerateCode(generator, MethodCompileOption.EmitStartAddress);
}
if (Target.NodeType == ExpressionType.MemberAccess)
{
MemberExpression target = (MemberExpression)Target;
if (target.Target.Type.IsValueType)
{
switch (target.Target.NodeType)
{
case ExpressionType.Indexer:
case ExpressionType.MemberAccess:
var temp = generator.DeclareVariable(target.Target.Type);
generator.StoreVariable(temp);
generator.LoadAddressOfVariable(temp);
break;
}
}
}
else if (Target.NodeType == ExpressionType.Identifier)
{
// if it an identifier expression this might be local member call
var exp = (NameExpression)Target;
if (exp.Binder == null && Method.IsStatic == false)
{
generator.LoadArgument(0);
}
}
generator.EmitArguments(Arguments, Conversions);
generator.Call(Method);
// if current value must not be returned for assigment
if ((option & MethodCompileOption.Return) == 0 && Type is object && Type != TypeProvider.VoidType)
{
generator.Pop();
}
}
public override void GenerateCode(MethodBodyGenerator generator, MethodCompileOption option)
{
if (Left.NodeType == ExpressionType.Identifier)
{
var exp = (NameExpression)Left;
var binder = exp.Binder;
// binder is null create new local variable
if (binder is null)
{
exp.Binder = binder = new Binders.VariableBinder(generator.DeclareVariable(Right.Type, exp.Name));
}
if ((binder.Attributes & Binders.BindingAttributes.HasThis) != 0)
{
generator.LoadArgument(0);
}
Right.GenerateCode(generator, Option);
if (Conversion != null)
{
generator.EmitConvert(Conversion);
}
binder.GenerateSet(Right, generator, option);
}
else if (Left.NodeType == ExpressionType.MemberAccess)
{
var exp = (MemberExpression)Left;
exp.Target.GenerateCode(generator);
// member assign for dynamic to be Any
if ((exp.Binder.Attributes & Binders.BindingAttributes.Dynamic) == Binders.BindingAttributes.Dynamic)
{
generator.Box(TypeProvider.AnyType);
}
Right.GenerateCode(generator, Option);
if (Conversion != null)
{
generator.EmitConvert(Conversion);
}
exp.Binder.GenerateSet(Right, generator, option);
}
else if (Left.NodeType == ExpressionType.Indexer)
{
GenerateIndexer(generator);
}
}
void CallPreFixMember(MethodBodyGenerator generator, IBinder binder, MethodCompileOption option)
{
// if no duplicate ex: i++ single line
if ((option & MethodCompileOption.Dupplicate) == 0)
{
binder.GenerateSet(Operand, generator);
return;
}
// ++i where i is member
// initially operator is called
var temp = generator.DeclareVariable(binder.Type);
// store the result to variable
generator.StoreVariable(temp);
// then load the variable
generator.LoadVariable(temp);
// store the variable result to member
binder.GenerateSet(Operand, generator);
// load the temp variable
generator.LoadVariable(temp);
}
/// <inheritdoc/>
public override void GenerateCode(MethodBodyGenerator generator)
{
// Generate code for the start of the statement.
var statementLocals = new StatementLocals();
GenerateStartOfStatement(generator, statementLocals);
if (NodeType == StatementType.Return)
{
bool lastStatement = true;
if (Value != null)
{
var exp = Value.Accept(generator);
exp.GenerateCode(generator, Expression.AssignOption);
if (generator.SyntaxTree is BlockStatement block)
{
if (block.Statements.Count > 0)
{
lastStatement = block.Statements[block.Statements.Count - 1] == this;
}
}
var dest = generator.Method.ReturnType;
if (dest is null)
{
throw new System.NullReferenceException(nameof(System.Reflection.MethodInfo.ReturnType));
}
// void type no return
if (dest != TypeProvider.VoidType)
{
// todo variable name not used
if (generator.ReturnVariable == null)
{
generator.ReturnVariable = generator.DeclareVariable(dest);
}
System.Type src = exp.Type;
if (!dest.IsAssignableFrom(src))
{
if (src.TryImplicitConvert(dest, out System.Reflection.MethodInfo method))
{
if (src.IsValueType && method.GetParameters()[0].ParameterType.IsValueType == false)
{
generator.Box(src);
}
generator.Call(method);
src = method.ReturnType;
}
else
{
throw new System.Exception(string.Concat("can't cast ", src, " to ", dest));
}
}
if (src.IsValueType && dest.IsValueType == false)
{
generator.Box(src);
}
generator.StoreVariable(generator.ReturnVariable);
if (generator.ReturnTarget == null)
{
generator.ReturnTarget = generator.CreateLabel();
}
}
}
//last statement is not a return
if (!lastStatement)
{
//if iniside try finally block
generator.EmitLongJump(generator, generator.ReturnTarget);
}
}
else if (NodeType == StatementType.Throw)
{
if (Value == null)
{
throw new System.ArgumentNullException("Value", "throw expression missing argument");
}
var exp = Value.Accept(generator);
exp.GenerateCode(generator, Expression.AssignOption);
generator.Throw();
}
GenerateEndOfStatement(generator, statementLocals);
}
public void GenerateGet(Expression target, MethodBodyGenerator generator, MethodCompileOption option)
{
generator.DeclareVariable(key.Type, key.Name);
}
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)));
}