|
static private GetTypeByAlias ( |
||
| op | ||
| return | ||
//====================================================================
// Implementation of [] semantics for reflected types. This mainly
// exists to implement the Array[int] syntax for creating arrays.
//====================================================================
public override IntPtr type_subscript(IntPtr ob, IntPtr idx)
{
if ((this.type) != typeof(Array))
{
return(Exceptions.RaiseTypeError("unsubscriptable object"));
}
if (Runtime.PyTuple_Check(idx))
{
return(Exceptions.RaiseTypeError("expected single type"));
}
ClassBase c = GetManagedObject(idx) as ClassBase;
Type t = (c != null) ? c.type : Converter.GetTypeByAlias(idx);
if (t == null)
{
return(Exceptions.RaiseTypeError("type expected"));
}
Array a = Array.CreateInstance(t, 0);
c = ClassManager.GetClass(a.GetType());
Runtime.Incref(c.pyHandle);
return(c.pyHandle);
}
internal static Type[] PythonArgsToTypeArray(IntPtr arg, bool mangleObjects)
{
// Given a PyObject * that is either a single type object or a
// tuple of (managed or unmanaged) type objects, return a Type[]
// containing the CLR Type objects that map to those types.
IntPtr args = arg;
var free = false;
if (!PyTuple_Check(arg))
{
args = Interop.PyTuple_New(1);
XIncref(arg);
Interop.PyTuple_SetItem(args, 0, arg);
free = true;
}
int n = Interop.PyTuple_Size(args);
var types = new Type[n];
Type t = null;
for (var i = 0; i < n; i++)
{
IntPtr op = Interop.PyTuple_GetItem(args, i);
if (mangleObjects && (!PyType_Check(op)))
{
op = PyObject_TYPE(op);
}
ManagedType mt = ManagedType.GetManagedObject(op);
if (mt is ClassBase)
{
t = ((ClassBase)mt).type;
}
else if (mt is CLRObject)
{
object inst = ((CLRObject)mt).inst;
if (inst is Type)
{
t = inst as Type;
}
}
else
{
t = Converter.GetTypeByAlias(op);
}
if (t == null)
{
types = null;
break;
}
types[i] = t;
}
if (free)
{
XDecref(args);
}
return(types);
}
/// <summary>
/// Implementation of [] semantics for reflected types. This exists
/// both to implement the Array[int] syntax for creating arrays and
/// to support generic name overload resolution using [].
/// </summary>
public override IntPtr type_subscript(IntPtr idx)
{
if (!type.Valid)
{
return(Exceptions.RaiseTypeError(type.DeletedMessage));
}
// If this type is the Array type, the [<type>] means we need to
// construct and return an array type of the given element type.
if (type.Value == typeof(Array))
{
if (Runtime.PyTuple_Check(idx))
{
return(Exceptions.RaiseTypeError("type expected"));
}
var c = GetManagedObject(idx) as ClassBase;
Type t = c != null ? c.type.Value : Converter.GetTypeByAlias(idx);
if (t == null)
{
return(Exceptions.RaiseTypeError("type expected"));
}
Type a = t.MakeArrayType();
ClassBase o = ClassManager.GetClass(a);
Runtime.XIncref(o.pyHandle);
return(o.pyHandle);
}
// If there are generics in our namespace with the same base name
// as the current type, then [<type>] means the caller wants to
// bind the generic type matching the given type parameters.
Type[] types = Runtime.PythonArgsToTypeArray(idx);
if (types == null)
{
return(Exceptions.RaiseTypeError("type(s) expected"));
}
Type gtype = AssemblyManager.LookupTypes($"{type.Value.FullName}`{types.Length}").FirstOrDefault();
if (gtype != null)
{
var g = ClassManager.GetClass(gtype) as GenericType;
return(g.type_subscript(idx));
//Runtime.XIncref(g.pyHandle);
//return g.pyHandle;
}
return(Exceptions.RaiseTypeError("unsubscriptable object"));
}
//====================================================================
// Implementation of [] semantics for reflected types. This exists
// both to implement the Array[int] syntax for creating arrays and
// to support generic name overload resolution using [].
//====================================================================
public override IntPtr type_subscript(IntPtr idx)
{
// If this type is the Array type, the [<type>] means we need to
// construct and return an array type of the given element type.
if ((this.type) == typeof(Array))
{
if (Runtime.PyTuple_Check(idx))
{
return(Exceptions.RaiseTypeError("type expected"));
}
ClassBase c = GetManagedObject(idx) as ClassBase;
Type t = (c != null) ? c.type : Converter.GetTypeByAlias(idx);
if (t == null)
{
return(Exceptions.RaiseTypeError("type expected"));
}
Type a = t.MakeArrayType();
ClassBase o = ClassManager.GetClass(a);
Runtime.Incref(o.pyHandle);
return(o.pyHandle);
}
// If there are generics in our namespace with the same base name
// as the current type, then [<type>] means the caller wants to
// bind the generic type matching the given type parameters.
Type[] types = Runtime.PythonArgsToTypeArray(idx);
if (types == null)
{
return(Exceptions.RaiseTypeError("type(s) expected"));
}
string gname = this.type.FullName + "`" + types.Length.ToString();
Type gtype = AssemblyManager.LookupType(gname);
if (gtype != null)
{
GenericType g = ClassManager.GetClass(gtype) as GenericType;
return(g.type_subscript(idx));
/*Runtime.Incref(g.pyHandle);
* return g.pyHandle;*/
}
return(Exceptions.RaiseTypeError("unsubscriptable object"));
}
static Type TryComputeClrArgumentType(Type parameterType, IntPtr argument, bool needsResolution)
{
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
Type clrtype = null;
IntPtr pyoptype;
if (needsResolution)
{
// HACK: each overload should be weighted in some way instead
pyoptype = Runtime.PyObject_Type(argument);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
clrtype = Converter.GetTypeByAlias(pyoptype);
}
Runtime.XDecref(pyoptype);
}
if (clrtype != null)
{
var typematch = false;
if ((parameterType != typeof(object)) && (parameterType != clrtype))
{
IntPtr pytype = Converter.GetPythonTypeByAlias(parameterType);
pyoptype = Runtime.PyObject_Type(argument);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
if (pytype != pyoptype)
{
typematch = false;
}
else
{
typematch = true;
clrtype = parameterType;
}
}
if (!typematch)
{
// this takes care of enum values
TypeCode argtypecode = Type.GetTypeCode(parameterType);
TypeCode paramtypecode = Type.GetTypeCode(clrtype);
if (argtypecode == paramtypecode)
{
typematch = true;
clrtype = parameterType;
}
}
Runtime.XDecref(pyoptype);
if (!typematch)
{
return(null);
}
}
else
{
typematch = true;
clrtype = parameterType;
}
}
else
{
clrtype = parameterType;
}
return(clrtype);
}
internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
{
// loop to find match, return invoker w/ or /wo error
MethodBase[] _methods = null;
int pynargs = Runtime.PyTuple_Size(args);
object arg;
var isGeneric = false;
ArrayList defaultArgList = null;
if (info != null)
{
_methods = new MethodBase[1];
_methods.SetValue(info, 0);
}
else
{
_methods = GetMethods();
}
Type clrtype;
// TODO: Clean up
foreach (MethodBase mi in _methods)
{
if (mi.IsGenericMethod)
{
isGeneric = true;
}
ParameterInfo[] pi = mi.GetParameters();
int clrnargs = pi.Length;
var match = false;
int arrayStart = -1;
var outs = 0;
if (pynargs == clrnargs)
{
match = true;
}
else if (pynargs < clrnargs)
{
match = true;
defaultArgList = new ArrayList();
for (int v = pynargs; v < clrnargs; v++)
{
if (pi[v].DefaultValue == DBNull.Value)
{
match = false;
}
else
{
defaultArgList.Add(pi[v].DefaultValue);
}
}
}
else if (pynargs > clrnargs && clrnargs > 0 &&
Attribute.IsDefined(pi[clrnargs - 1], typeof(ParamArrayAttribute)))
{
// This is a `foo(params object[] bar)` style method
match = true;
arrayStart = clrnargs - 1;
}
if (match)
{
var margs = new object[clrnargs];
for (var n = 0; n < clrnargs; n++)
{
IntPtr op;
if (n < pynargs)
{
if (arrayStart == n)
{
// map remaining Python arguments to a tuple since
// the managed function accepts it - hopefully :]
op = Runtime.PyTuple_GetSlice(args, arrayStart, pynargs);
}
else
{
op = Runtime.PyTuple_GetItem(args, n);
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
clrtype = null;
IntPtr pyoptype;
if (_methods.Length > 1)
{
pyoptype = IntPtr.Zero;
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
clrtype = Converter.GetTypeByAlias(pyoptype);
}
Runtime.XDecref(pyoptype);
}
if (clrtype != null)
{
var typematch = false;
if ((pi[n].ParameterType != typeof(object)) && (pi[n].ParameterType != clrtype))
{
IntPtr pytype = Converter.GetPythonTypeByAlias(pi[n].ParameterType);
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
if (pytype != pyoptype)
{
typematch = false;
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
if (!typematch)
{
// this takes care of nullables
var underlyingType = Nullable.GetUnderlyingType(pi[n].ParameterType);
if (underlyingType == null)
{
underlyingType = pi[n].ParameterType;
}
// this takes care of enum values
TypeCode argtypecode = Type.GetTypeCode(underlyingType);
TypeCode paramtypecode = Type.GetTypeCode(clrtype);
if (argtypecode == paramtypecode)
{
typematch = true;
clrtype = pi[n].ParameterType;
}
// this takes care of implicit conversions
var opImplicit = pi[n].ParameterType.GetMethod("op_Implicit", new[] { clrtype });
if (opImplicit != null)
{
typematch = opImplicit.ReturnType == pi[n].ParameterType;
clrtype = pi[n].ParameterType;
}
}
Runtime.XDecref(pyoptype);
if (!typematch)
{
margs = null;
break;
}
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
else
{
clrtype = pi[n].ParameterType;
}
if (pi[n].IsOut || clrtype.IsByRef)
{
outs++;
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
Exceptions.Clear();
margs = null;
break;
}
if (arrayStart == n)
{
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(op);
}
margs[n] = arg;
}
else
{
if (defaultArgList != null)
{
margs[n] = defaultArgList[n - pynargs];
}
}
}
if (margs == null)
{
continue;
}
object target = null;
if (!mi.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
return(new Binding(mi, target, margs, outs));
}
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodinfo != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(args, true);
MethodInfo mi = MatchParameters(methodinfo, types);
return(Bind(inst, args, kw, mi, null));
}
return(null);
}
internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
{
// loop to find match, return invoker w/ or /wo error
int pynargs = Runtime.PyTuple_Size(args);
object arg;
var isGeneric = false;
ArrayList defaultArgList;
Type clrtype;
Binding bindingUsingImplicitConversion = null;
var methods = info == null?GetMethods()
: new List <MethodInformation>(1)
{
new MethodInformation(info, info.GetParameters())
};
// TODO: Clean up
foreach (var methodInformation in methods)
{
var mi = methodInformation.MethodBase;
var pi = methodInformation.ParameterInfo;
if (mi.IsGenericMethod)
{
isGeneric = true;
}
int clrnargs = pi.Length;
int arrayStart;
if (CheckMethodArgumentsMatch(clrnargs,
pynargs,
pi,
out arrayStart,
out defaultArgList))
{
var outs = 0;
var margs = new object[clrnargs];
var usedImplicitConversion = false;
for (var n = 0; n < clrnargs; n++)
{
IntPtr op;
if (n < pynargs)
{
if (arrayStart == n)
{
// map remaining Python arguments to a tuple since
// the managed function accepts it - hopefully :]
op = Runtime.PyTuple_GetSlice(args, arrayStart, pynargs);
}
else
{
op = Runtime.PyTuple_GetItem(args, n);
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
clrtype = null;
IntPtr pyoptype;
if (methods.Count > 1)
{
pyoptype = IntPtr.Zero;
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
clrtype = Converter.GetTypeByAlias(pyoptype);
}
Runtime.XDecref(pyoptype);
}
if (clrtype != null)
{
var typematch = false;
if ((pi[n].ParameterType != typeof(object)) && (pi[n].ParameterType != clrtype))
{
IntPtr pytype = Converter.GetPythonTypeByAlias(pi[n].ParameterType);
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
if (pytype != pyoptype)
{
typematch = false;
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
if (!typematch)
{
// this takes care of nullables
var underlyingType = Nullable.GetUnderlyingType(pi[n].ParameterType);
if (underlyingType == null)
{
underlyingType = pi[n].ParameterType;
}
// this takes care of enum values
TypeCode argtypecode = Type.GetTypeCode(underlyingType);
TypeCode paramtypecode = Type.GetTypeCode(clrtype);
if (argtypecode == paramtypecode)
{
typematch = true;
clrtype = pi[n].ParameterType;
}
// accepts non-decimal numbers in decimal parameters
if (underlyingType == typeof(decimal))
{
clrtype = pi[n].ParameterType;
typematch = Converter.ToManaged(op, clrtype, out arg, false);
}
// this takes care of implicit conversions
var opImplicit = pi[n].ParameterType.GetMethod("op_Implicit", new[] { clrtype });
if (opImplicit != null)
{
usedImplicitConversion = typematch = opImplicit.ReturnType == pi[n].ParameterType;
clrtype = pi[n].ParameterType;
}
}
Runtime.XDecref(pyoptype);
if (!typematch)
{
margs = null;
break;
}
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
else
{
clrtype = pi[n].ParameterType;
}
if (pi[n].IsOut || clrtype.IsByRef)
{
outs++;
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
Exceptions.Clear();
margs = null;
break;
}
if (arrayStart == n)
{
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(op);
}
margs[n] = arg;
}
else
{
if (defaultArgList != null)
{
margs[n] = defaultArgList[n - pynargs];
}
}
}
if (margs == null)
{
continue;
}
object target = null;
if (!mi.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
var binding = new Binding(mi, target, margs, outs);
if (usedImplicitConversion)
{
// lets just keep the first binding using implicit conversion
// this is to respect method order/precedence
if (bindingUsingImplicitConversion == null)
{
// in this case we will not return the binding yet in case there is a match
// which does not use implicit conversions, which will return directly
bindingUsingImplicitConversion = binding;
}
}
else
{
return(binding);
}
}
}
// if we generated a binding using implicit conversion return it
if (bindingUsingImplicitConversion != null)
{
return(bindingUsingImplicitConversion);
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodinfo != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(args, true);
MethodInfo mi = MatchParameters(methodinfo, types);
return(Bind(inst, args, kw, mi, null));
}
return(null);
}
internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
{
// Relevant function variables used post conversion
var isGeneric = false;
Binding bindingUsingImplicitConversion = null;
// If we have KWArgs create dictionary and collect them
Dictionary <string, IntPtr> kwArgDict = null;
if (kw != IntPtr.Zero)
{
var pyKwArgsCount = (int)Runtime.PyDict_Size(kw);
kwArgDict = new Dictionary <string, IntPtr>(pyKwArgsCount);
IntPtr keylist = Runtime.PyDict_Keys(kw);
IntPtr valueList = Runtime.PyDict_Values(kw);
for (int i = 0; i < pyKwArgsCount; ++i)
{
var keyStr = Runtime.GetManagedString(Runtime.PyList_GetItem(new BorrowedReference(keylist), i));
kwArgDict[keyStr] = Runtime.PyList_GetItem(new BorrowedReference(valueList), i).DangerousGetAddress();
}
Runtime.XDecref(keylist);
Runtime.XDecref(valueList);
}
// Fetch our methods we are going to attempt to match and bind too.
var methods = info == null?GetMethods()
: new List <MethodInformation>(1)
{
new MethodInformation(info, info.GetParameters())
};
foreach (var methodInformation in methods)
{
// Relevant method variables
var mi = methodInformation.MethodBase;
var pi = methodInformation.ParameterInfo;
isGeneric = mi.IsGenericMethod;
int pyArgCount = (int)Runtime.PyTuple_Size(args);
// Special case for operators
bool isOperator = OperatorMethod.IsOperatorMethod(mi);
// Binary operator methods will have 2 CLR args but only one Python arg
// (unary operators will have 1 less each), since Python operator methods are bound.
isOperator = isOperator && pyArgCount == pi.Length - 1;
bool isReverse = isOperator && OperatorMethod.IsReverse((MethodInfo)mi); // Only cast if isOperator.
if (isReverse && OperatorMethod.IsComparisonOp((MethodInfo)mi))
{
continue; // Comparison operators in Python have no reverse mode.
}
// Preprocessing pi to remove either the first or second argument.
if (isOperator && !isReverse)
{
// The first Python arg is the right operand, while the bound instance is the left.
// We need to skip the first (left operand) CLR argument.
pi = pi.Skip(1).ToArray();
}
else if (isOperator && isReverse)
{
// The first Python arg is the left operand.
// We need to take the first CLR argument.
pi = pi.Take(1).ToArray();
}
// Must be done after IsOperator section
int clrArgCount = pi.Length;
if (CheckMethodArgumentsMatch(clrArgCount,
pyArgCount,
kwArgDict,
pi,
out bool paramsArray,
out ArrayList defaultArgList))
{
var outs = 0;
var margs = new object[clrArgCount];
int paramsArrayIndex = paramsArray ? pi.Length - 1 : -1; // -1 indicates no paramsArray
var usedImplicitConversion = false;
// Conversion loop for each parameter
for (int paramIndex = 0; paramIndex < clrArgCount; paramIndex++)
{
IntPtr op = IntPtr.Zero; // Python object to be converted; not yet set
var parameter = pi[paramIndex]; // Clr parameter we are targeting
object arg; // Python -> Clr argument
// Check our KWargs for this parameter
bool hasNamedParam = kwArgDict == null ? false : kwArgDict.TryGetValue(parameter.Name, out op);
bool isNewReference = false;
// Check if we are going to use default
if (paramIndex >= pyArgCount && !(hasNamedParam || (paramsArray && paramIndex == paramsArrayIndex)))
{
if (defaultArgList != null)
{
margs[paramIndex] = defaultArgList[paramIndex - pyArgCount];
}
continue;
}
// At this point, if op is IntPtr.Zero we don't have a KWArg and are not using default
if (op == IntPtr.Zero)
{
// If we have reached the paramIndex
if (paramsArrayIndex == paramIndex)
{
op = HandleParamsArray(args, paramsArrayIndex, pyArgCount, out isNewReference);
}
else
{
op = Runtime.PyTuple_GetItem(args, paramIndex);
}
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
Type clrtype = null;
IntPtr pyoptype;
if (methods.Count > 1)
{
pyoptype = IntPtr.Zero;
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
clrtype = Converter.GetTypeByAlias(pyoptype);
}
Runtime.XDecref(pyoptype);
}
if (clrtype != null)
{
var typematch = false;
if ((parameter.ParameterType != typeof(object)) && (parameter.ParameterType != clrtype))
{
IntPtr pytype = Converter.GetPythonTypeByAlias(parameter.ParameterType);
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
if (pytype != pyoptype)
{
typematch = false;
}
else
{
typematch = true;
clrtype = parameter.ParameterType;
}
}
if (!typematch)
{
// this takes care of nullables
var underlyingType = Nullable.GetUnderlyingType(parameter.ParameterType);
if (underlyingType == null)
{
underlyingType = parameter.ParameterType;
}
// this takes care of enum values
TypeCode argtypecode = Type.GetTypeCode(underlyingType);
TypeCode paramtypecode = Type.GetTypeCode(clrtype);
if (argtypecode == paramtypecode)
{
typematch = true;
clrtype = parameter.ParameterType;
}
// accepts non-decimal numbers in decimal parameters
if (underlyingType == typeof(decimal))
{
clrtype = parameter.ParameterType;
typematch = Converter.ToManaged(op, clrtype, out arg, false);
}
// this takes care of implicit conversions
var opImplicit = parameter.ParameterType.GetMethod("op_Implicit", new[] { clrtype });
if (opImplicit != null)
{
usedImplicitConversion = typematch = opImplicit.ReturnType == parameter.ParameterType;
clrtype = parameter.ParameterType;
}
}
Runtime.XDecref(pyoptype);
if (!typematch)
{
margs = null;
break;
}
}
else
{
clrtype = parameter.ParameterType;
}
}
else
{
clrtype = parameter.ParameterType;
}
if (parameter.IsOut || clrtype.IsByRef)
{
outs++;
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
Exceptions.Clear();
margs = null;
break;
}
if (isNewReference)
{
// TODO: is this a bug? Should this happen even if the conversion fails?
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(op);
}
margs[paramIndex] = arg;
}
if (margs == null)
{
continue;
}
if (isOperator)
{
if (inst != IntPtr.Zero)
{
if (ManagedType.GetManagedObject(inst) is CLRObject co)
{
bool isUnary = pyArgCount == 0;
// Postprocessing to extend margs.
var margsTemp = isUnary ? new object[1] : new object[2];
// If reverse, the bound instance is the right operand.
int boundOperandIndex = isReverse ? 1 : 0;
// If reverse, the passed instance is the left operand.
int passedOperandIndex = isReverse ? 0 : 1;
margsTemp[boundOperandIndex] = co.inst;
if (!isUnary)
{
margsTemp[passedOperandIndex] = margs[0];
}
margs = margsTemp;
}
else
{
continue;
}
}
}
object target = null;
if (!mi.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
var binding = new Binding(mi, target, margs, outs);
if (usedImplicitConversion)
{
// lets just keep the first binding using implicit conversion
// this is to respect method order/precedence
if (bindingUsingImplicitConversion == null)
{
// in this case we will not return the binding yet in case there is a match
// which does not use implicit conversions, which will return directly
bindingUsingImplicitConversion = binding;
}
}
else
{
return(binding);
}
}
}
// if we generated a binding using implicit conversion return it
if (bindingUsingImplicitConversion != null)
{
return(bindingUsingImplicitConversion);
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodinfo != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(args, true);
MethodInfo mi = MatchParameters(methodinfo, types);
return(Bind(inst, args, kw, mi, null));
}
return(null);
}
internal Binding Bind(IntPtr inst, IntPtr pythonParametersPtr, IntPtr kw, MethodBase info, MethodInfo[] methodInfoArray)
{
// loop to find match, return invoker w/ or /wo error
MethodBase[] _methods = null;
// NOTE: return the size of the args pointer (the number of parameter from the python call)
int pythonParameterCount = Runtime.PyTuple_Size(pythonParametersPtr);
//WHY: Why is that so widely scoped ?
object pythonManagedParameterPtr;
var isGeneric = false;
ArrayList defaultParameterList = null;
if (info != null)
{
// NOTE: If a MethodBase object has been provided, create an array with only it.
// WHY a method base is provided some times and not other ? (ex: when call a genric with a type in [])
_methods = new MethodBase[1];
_methods.SetValue(info, 0);
}
else
{
// NOTE: Create an array of MethodBase from teh called method/constructor
// WHY not use the methodinfo provided?
_methods = GetMethods();
}
//WHY is it so widely scoped
Type clrConvertedParameterType;
// TODO: Clean up
foreach (MethodBase methodInfo in _methods)
{
//WHY not just do isGeneric = mi.IsGenericMethod or use it directly ?
if (methodInfo.IsGenericMethod)
{
isGeneric = true;
}
//NOTE: Get the parameter from the current MethodBase
//NOTE: MethodInfo Ok
ParameterInfo[] clrParameterInfoArray = methodInfo.GetParameters();
//NOTE: Get the number of clr parameters
int clrParameterCount = clrParameterInfoArray.Length;
var paramCountMatch = false;
//REFACTOR: Use var like the other local variables
var clrHasParamArray = false;
var clrParamsArrayStart = -1;
var byRefCount = 0;
if (pythonParameterCount == clrParameterCount)
{
paramCountMatch = true;
}
else if (pythonParameterCount < clrParameterCount)
{
paramCountMatch = true;
defaultParameterList = new ArrayList();
for (int v = pythonParameterCount; v < clrParameterCount; v++)
{
if (clrParameterInfoArray[v].DefaultValue == DBNull.Value)
{
paramCountMatch = false;
}
else
{
defaultParameterList.Add(clrParameterInfoArray[v].DefaultValue);
}
}
}
else if (pythonParameterCount > clrParameterCount && clrParameterCount > 0 &&
Attribute.IsDefined(clrParameterInfoArray[clrParameterCount - 1], typeof(ParamArrayAttribute)))
{
// This is a `foo({...}, params object[] bar)` style method
paramCountMatch = true;
clrHasParamArray = true;
clrParamsArrayStart = clrParameterCount - 1;
}
if (paramCountMatch)
{
var methodParametersPtrArray = new object[clrParameterCount];
for (var n = 0; n < clrParameterCount; n++)
{
IntPtr pythonParameterPtr;
if (n < pythonParameterCount)
{
if (clrParamsArrayStart == n)
{
// map remaining Python arguments to a tuple since
// the managed function accepts it - hopefully :]
//WHY: Hmmm it returns a lot of python paramter as one. isn't there a problem later ?
pythonParameterPtr = Runtime.PyTuple_GetSlice(pythonParametersPtr, clrParamsArrayStart, pythonParameterCount);
}
else
{
pythonParameterPtr = Runtime.PyTuple_GetItem(pythonParametersPtr, n);
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
clrConvertedParameterType = null;
IntPtr pythonParameterPtrType = IntPtr.Zero;
if (_methods.Length > 1)
{
pythonParameterPtrType = Runtime.PyObject_Type(pythonParameterPtr);
Exceptions.Clear();
if (pythonParameterPtrType != IntPtr.Zero)
{
clrConvertedParameterType = Converter.GetTypeByAlias(pythonParameterPtrType);
}
Runtime.XDecref(pythonParameterPtrType);
}
if (clrConvertedParameterType != null)
{
var parameterTypeMatch = false;
if ((clrParameterInfoArray[n].ParameterType != typeof(object)) && (clrParameterInfoArray[n].ParameterType != clrConvertedParameterType))
{
IntPtr pythonConvertedParameterPtrType = Converter.GetPythonTypeByAlias(clrParameterInfoArray[n].ParameterType);
pythonParameterPtrType = Runtime.PyObject_Type(pythonParameterPtr);
Exceptions.Clear();
if (pythonParameterPtrType != IntPtr.Zero)
{
if (pythonConvertedParameterPtrType != pythonParameterPtrType)
{
parameterTypeMatch = false;
}
else
{
parameterTypeMatch = true;
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
}
if (!parameterTypeMatch)
{
// this takes care of enum values
TypeCode clrParameterTypeCode = Type.GetTypeCode(clrParameterInfoArray[n].ParameterType);
TypeCode clrConvertedParameterTypeCode = Type.GetTypeCode(clrConvertedParameterType);
if (clrParameterTypeCode == clrConvertedParameterTypeCode)
{
parameterTypeMatch = true;
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
}
Runtime.XDecref(pythonParameterPtrType);
if (!parameterTypeMatch)
{
methodParametersPtrArray = null;
break;
}
}
else
{
parameterTypeMatch = true;
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
}
else
{
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
if (clrParameterInfoArray[n].IsOut || clrConvertedParameterType.IsByRef)
{
byRefCount++;
}
if (!Converter.ToManaged(pythonParameterPtr, clrConvertedParameterType, out pythonManagedParameterPtr, false))
{
Exceptions.Clear();
methodParametersPtrArray = null;
break;
}
if (clrParamsArrayStart == n)
{
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(pythonParameterPtr);
}
methodParametersPtrArray[n] = pythonParameterPtr;
}
else
{
if (defaultParameterList != null)
{
methodParametersPtrArray[n] = defaultParameterList[n - pythonParameterCount];
}
}
}
if (methodParametersPtrArray == null)
{
continue;
}
object target = null;
if (!methodInfo.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
return(new Binding(methodInfo, target, methodParametersPtrArray, byRefCount));
}
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodInfoArray != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(pythonParametersPtr, true);
MethodInfo mi = MatchParameters(methodInfoArray, types);
return(Bind(inst, pythonParametersPtr, kw, mi, null));
}
return(null);
}
/// <summary>
/// Implements __contains__ for dictionary types.
/// </summary>
public static int sq_contains(BorrowedReference ob, BorrowedReference v)
{
var obj = (CLRObject)GetManagedObject(ob);
var self = obj.inst;
var key = Tuple.Create(self.GetType(), "ContainsKey");
var methodInfo = methodsByType[key];
var parameters = methodInfo.GetParameters();
object arg;
if (!Converter.ToManaged(v, parameters[0].ParameterType, out arg, false))
{
Exceptions.SetError(Exceptions.TypeError,
$"invalid parameter type for sq_contains: should be {Converter.GetTypeByAlias(v)}, found {parameters[0].ParameterType}");
}
return((bool)methodInfo.Invoke(self, new[] { arg }) ? 1 : 0);
}
internal static MethodInfo MatchByTypeSig(MethodInfo[] msig,
IntPtr psig)
{
IntPtr args = psig;
bool free = false;
if (!Runtime.PyTuple_Check(psig))
{
args = Runtime.PyTuple_New(1);
Runtime.Incref(psig);
Runtime.PyTuple_SetItem(args, 0, psig);
free = true;
}
int plen = Runtime.PyTuple_Size(args);
MethodInfo match = null;
// XXX: what about out args, etc.?
for (int i = 0; i < msig.Length; i++)
{
ParameterInfo[] pi = msig[i].GetParameters();
if (pi.Length != plen)
{
continue;
}
bool matched = true;
for (int n = 0; n < pi.Length; n++)
{
IntPtr p = Runtime.PyTuple_GetItem(args, n);
if (p == IntPtr.Zero)
{
Exceptions.Clear();
break;
}
ClassBase c = ManagedType.GetManagedObject(p) as ClassBase;
Type t = (c != null) ? c.type :
Converter.GetTypeByAlias(p);
if (t == null)
{
break;
}
if (t != pi[n].ParameterType)
{
matched = false;
break;
}
}
if (matched)
{
match = msig[i];
break;
}
}
if (free)
{
Runtime.Decref(args);
}
return(match);
}