public static Expression BindToCall(Expression instance, MethodBase method, Expression ctx, OverloadBinder.ArgumentsBinder args)
{
Debug.Assert(method is MethodInfo || method is ConstructorInfo);
var ps = method.GetParameters();
var boundargs = new Expression[ps.Length];
int argi = 0;
for (int i = 0; i < ps.Length; i++)
{
var p = ps[i];
if (argi == 0 && p.IsImplicitParameter())
{
if (p.IsContextParameter())
{
boundargs[i] = ctx;
}
else if (p.IsImportLocalsParameter())
{
// no way we can implement this
throw new NotImplementedException(); // TODO: empty array & report warning
}
else if (p.IsImportCallerArgsParameter())
{
// we don't have this info
throw new NotImplementedException(); // TODO: empty array & report warning
}
else if (p.IsImportCallerClassParameter())
{
// TODO: pass classctx from the callsite
throw new NotImplementedException();
}
else
{
throw new NotImplementedException();
}
}
else
{
if (i == ps.Length - 1 && p.IsParamsParameter())
{
var element_type = p.ParameterType.GetElementType();
boundargs[i] = args.BindParams(argi, element_type);
break;
}
else
{
boundargs[i] = args.BindArgument(argi, p);
}
//
argi++;
}
}
//
Debug.Assert(boundargs.All(x => x != null));
//
if (method.IsStatic)
{
instance = null;
}
//
if (method.IsConstructor)
{
return(Expression.New((ConstructorInfo)method, boundargs));
}
if (instance != null)
{
instance = Expression.Convert(instance, method.DeclaringType);
}
if (instance != null && method.IsVirtual) // NOTE: only needed for parent::foo(), static::foo() and self::foo() ?
{
// Ugly hack here,
// we NEED to call the method nonvirtually, but LambdaCompiler emits .callvirt always and there is no way how to change it (except we can emit all the stuff by ourselfs).
// We use DynamicMethod to emit .call inside, and use its MethodInfo which is static.
// LambdaCompiler generates .call to static DynamicMethod which calls our method via .call as well,
// after all the inlining, there should be no overhead.
method = WrapInstanceMethodToStatic((MethodInfo)method);
//
var newargs = new Expression[boundargs.Length + 1];
newargs[0] = instance;
Array.Copy(boundargs, 0, newargs, 1, boundargs.Length);
boundargs = newargs;
instance = null;
}
//
return(Expression.Call(instance, (MethodInfo)method, boundargs));
}
public static Expression BindToCall(Expression instance, MethodBase method, Expression ctx, OverloadBinder.ArgumentsBinder args, bool isStaticCallSyntax, PhpTypeInfo lateStaticType)
{
Debug.Assert(method is MethodInfo || method is ConstructorInfo);
var ps = method.GetParameters();
var boundargs = new Expression[ps.Length];
int argi = 0;
for (int i = 0; i < ps.Length; i++)
{
var p = ps[i];
if (argi == 0 && p.IsImplicitParameter())
{
if (p.IsContextParameter())
{
boundargs[i] = ctx;
}
else if (p.IsQueryValueParameter())
{
if (p.ParameterType == typeof(QueryValue <CallerScript>))
{
// we don't have this info
throw new NotSupportedException();
}
else if (p.ParameterType == typeof(QueryValue <CallerArgs>))
{
// we don't have this info
throw new NotImplementedException(); // TODO: empty array & report warning
}
else if (p.ParameterType == typeof(QueryValue <LocalVariables>))
{
// pass NULL value if we don't have the locals
boundargs[i] = Expression.Default(p.ParameterType);
// TODO: report it might get wrong
// TODO: if we create IPhpCallback in compile-time, we know the routine needs the locals, ...
}
}
else if (p.IsLateStaticParameter())
{
if (lateStaticType != null)
{
// Template: PhpTypeInfoExtension.GetPhpTypeInfo<lateStaticType>()
boundargs[i] = Expression.Call(
null,
typeof(PhpTypeInfoExtension).GetMethod("GetPhpTypeInfo", Cache.Types.Empty).MakeGenericMethod(lateStaticType.Type.AsType()));
}
else
{
throw new InvalidOperationException("static context not available.");
}
}
else if (p.IsImportCallerClassParameter())
{
// TODO: pass classctx from the callsite
throw new NotImplementedException();
}
else if (p.IsImportCallerStaticClassParameter())
{
throw new NotSupportedException(); // we don't know current late static bound type
}
else
{
throw new NotImplementedException();
}
}
else
{
if (i == ps.Length - 1 && p.IsParamsParameter())
{
var element_type = p.ParameterType.GetElementType();
boundargs[i] = args.BindParams(argi, element_type);
break;
}
else
{
boundargs[i] = args.BindArgument(argi, p);
}
//
argi++;
}
}
//
Debug.Assert(boundargs.All(x => x != null));
//
if (method.IsStatic)
{
instance = null;
}
//
if (method.IsConstructor)
{
return(Expression.New((ConstructorInfo)method, boundargs));
}
if (HasToBeCalledNonVirtually(instance, method, isStaticCallSyntax))
{
// Ugly hack here,
// we NEED to call the method nonvirtually, but LambdaCompiler emits .callvirt always and there is no way how to change it (except we can emit all the stuff by ourselfs).
// We use DynamicMethod to emit .call inside, and use its MethodInfo which is static.
// LambdaCompiler generates .call to static DynamicMethod which calls our method via .call as well,
// after all the inlining, there should be no overhead.
instance = Expression.Convert(instance, method.DeclaringType);
method = WrapInstanceMethodToStatic((MethodInfo)method);
//
var newargs = new Expression[boundargs.Length + 1];
newargs[0] = instance;
Array.Copy(boundargs, 0, newargs, 1, boundargs.Length);
boundargs = newargs;
instance = null;
}
if (instance != null && !method.DeclaringType.IsAssignableFrom(instance.Type))
{
instance = Expression.Convert(instance, method.DeclaringType);
}
// NOTE: instead of "HasToBeCalledNonVirtually" magic above, it would be great to just use ".call" opcode always (as of now Linq cannot do that)
//
return(Expression.Call(instance, (MethodInfo)method, boundargs));
}