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This repository was archived by the owner on Jul 22, 2023. It is now read-only.
/pythonnetPublic archive
forked frompythonnet/pythonnet

Commit49a230b

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Fix params argument handling (pythonnet#1106)
Add a check to see if the last parameter is a params parameter. Set the correct flag to show that it is a paramsArray function.Fixespythonnet#943 andpythonnet#331.
1 parent4a92d80 commit49a230b

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3 files changed

+81
-10
lines changed

3 files changed

+81
-10
lines changed

‎CHANGELOG.md‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -39,8 +39,9 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
3939
together with Nuitka
4040
- Fixes bug where delegates get casts (dotnetcore)
4141
- Determine size of interpreter longs at runtime
42-
- Handling exceptions ocurred in ModuleObject's getattribute
42+
- Handling exceptions ocurred in ModuleObject's getattribute
4343
- Fill`__classcell__` correctly for Python subclasses of .NET types
44+
- Fixed issue with params methods that are not passed an array.
4445

4546
##[2.4.0][]
4647

‎src/runtime/methodbinder.cs‎

Lines changed: 48 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -369,6 +369,41 @@ internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, Meth
369369
returnnull;
370370
}
371371

372+
staticIntPtrHandleParamsArray(IntPtrargs,intarrayStart,intpyArgCount,outboolisNewReference)
373+
{
374+
isNewReference=false;
375+
IntPtrop;
376+
// for a params method, we may have a sequence or single/multiple items
377+
// here we look to see if the item at the paramIndex is there or not
378+
// and then if it is a sequence itself.
379+
if((pyArgCount-arrayStart)==1)
380+
{
381+
// we only have one argument left, so we need to check it
382+
// to see if it is a sequence or a single item
383+
IntPtritem=Runtime.PyTuple_GetItem(args,arrayStart);
384+
if(!Runtime.PyString_Check(item)&&Runtime.PySequence_Check(item))
385+
{
386+
// it's a sequence (and not a string), so we use it as the op
387+
op=item;
388+
}
389+
else
390+
{
391+
isNewReference=true;
392+
op=Runtime.PyTuple_GetSlice(args,arrayStart,pyArgCount);
393+
if(item!=IntPtr.Zero)
394+
{
395+
Runtime.XDecref(item);
396+
}
397+
}
398+
}
399+
else
400+
{
401+
isNewReference=true;
402+
op=Runtime.PyTuple_GetSlice(args,arrayStart,pyArgCount);
403+
}
404+
returnop;
405+
}
406+
372407
/// <summary>
373408
/// Attempts to convert Python positional argument tuple and keyword argument table
374409
/// into an array of managed objects, that can be passed to a method.
@@ -397,8 +432,9 @@ static object[] TryConvertArguments(ParameterInfo[] pi, bool paramsArray,
397432
{
398433
varparameter=pi[paramIndex];
399434
boolhasNamedParam=kwargDict.ContainsKey(parameter.Name);
435+
boolisNewReference=false;
400436

401-
if(paramIndex>=pyArgCount&&!hasNamedParam)
437+
if(paramIndex>=pyArgCount&&!(hasNamedParam||(paramsArray&&paramIndex==arrayStart)))
402438
{
403439
if(defaultArgList!=null)
404440
{
@@ -415,11 +451,14 @@ static object[] TryConvertArguments(ParameterInfo[] pi, bool paramsArray,
415451
}
416452
else
417453
{
418-
op=(arrayStart==paramIndex)
419-
// map remaining Python arguments to a tuple since
420-
// the managed function accepts it - hopefully :]
421-
?Runtime.PyTuple_GetSlice(args,arrayStart,pyArgCount)
422-
:Runtime.PyTuple_GetItem(args,paramIndex);
454+
if(arrayStart==paramIndex)
455+
{
456+
op=HandleParamsArray(args,arrayStart,pyArgCount,outisNewReference);
457+
}
458+
else
459+
{
460+
op=Runtime.PyTuple_GetItem(args,paramIndex);
461+
}
423462
}
424463

425464
boolisOut;
@@ -428,7 +467,7 @@ static object[] TryConvertArguments(ParameterInfo[] pi, bool paramsArray,
428467
returnnull;
429468
}
430469

431-
if(arrayStart==paramIndex)
470+
if(isNewReference)
432471
{
433472
// TODO: is this a bug? Should this happen even if the conversion fails?
434473
// GetSlice() creates a new reference but GetItem()
@@ -543,7 +582,7 @@ static bool MatchesArgumentCount(int positionalArgumentCount, ParameterInfo[] pa
543582
{
544583
defaultArgList=null;
545584
varmatch=false;
546-
paramsArray=false;
585+
paramsArray=parameters.Length>0?Attribute.IsDefined(parameters[parameters.Length-1],typeof(ParamArrayAttribute)):false;
547586

548587
if(positionalArgumentCount==parameters.Length)
549588
{
@@ -572,7 +611,7 @@ static bool MatchesArgumentCount(int positionalArgumentCount, ParameterInfo[] pa
572611
// to be passed in as the parameter value
573612
defaultArgList.Add(parameters[v].GetDefaultValue());
574613
}
575-
else
614+
elseif(!paramsArray)
576615
{
577616
match=false;
578617
}

‎src/tests/test_method.py‎

Lines changed: 31 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -257,6 +257,37 @@ def test_non_params_array_in_last_place():
257257
result=MethodTest.TestNonParamsArrayInLastPlace(1,2,3)
258258
assertresult
259259

260+
deftest_params_methods_with_no_params():
261+
"""Tests that passing no arguments to a params method
262+
passes an empty array"""
263+
result=MethodTest.TestValueParamsArg()
264+
assertlen(result)==0
265+
266+
result=MethodTest.TestOneArgWithParams('Some String')
267+
assertlen(result)==0
268+
269+
result=MethodTest.TestTwoArgWithParams('Some String','Some Other String')
270+
assertlen(result)==0
271+
272+
deftest_params_methods_with_non_lists():
273+
"""Tests that passing single parameters to a params
274+
method will convert into an array on the .NET side"""
275+
result=MethodTest.TestOneArgWithParams('Some String', [1,2,3,4])
276+
assertlen(result)==4
277+
278+
result=MethodTest.TestOneArgWithParams('Some String',1,2,3,4)
279+
assertlen(result)==4
280+
281+
result=MethodTest.TestOneArgWithParams('Some String', [5])
282+
assertlen(result)==1
283+
284+
result=MethodTest.TestOneArgWithParams('Some String',5)
285+
assertlen(result)==1
286+
287+
deftest_params_method_with_lists():
288+
"""Tests passing multiple lists to a params object[] method"""
289+
result=MethodTest.TestObjectParamsArg([],[])
290+
assertlen(result)==2
260291

261292
deftest_string_out_params():
262293
"""Test use of string out-parameters."""

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