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Explicit float and int conversion for builtin types (#1904) · psyfrett/pythonnet@0909021 · GitHub

  1. psyfrett
  2. pythonnet

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Commit 0909021

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filmor
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Explicit float and int conversion for builtin types (pythonnet#1904)
1 parent 5f63c67 commit 0909021

5 files changed

Lines changed: 82 additions & 0 deletions

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‎src/runtime/Native/ITypeOffsets.cs‎

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Original file line numberDiff line numberDiff line change
@@ -22,6 +22,7 @@ interface ITypeOffsets
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int nb_true_divide { get; }
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int nb_and { get; }
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int nb_int { get; }
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int nb_float { get; }
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int nb_or { get; }
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int nb_xor { get; }
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int nb_lshift { get; }

‎src/runtime/Native/TypeOffset.cs‎

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@@ -31,6 +31,7 @@ static partial class TypeOffset
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internal static int nb_or { get; private set; }
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internal static int nb_xor { get; private set; }
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internal static int nb_int { get; private set; }
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internal static int nb_float { get; private set; }
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internal static int nb_lshift { get; private set; }
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internal static int nb_rshift { get; private set; }
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internal static int nb_remainder { get; private set; }

‎src/runtime/Types/ClassBase.cs‎

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@@ -529,6 +529,37 @@ static NewReference tp_call_impl(BorrowedReference ob, BorrowedReference args, B
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return callBinder.Invoke(ob, args, kw);
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}
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static NewReference DoConvert(BorrowedReference ob)
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{
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var self = (CLRObject)GetManagedObject(ob)!;
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using var python = self.inst.ToPython();
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return python.NewReferenceOrNull();
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}
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static NewReference DoConvertInt(BorrowedReference ob)
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{
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var self = (CLRObject)GetManagedObject(ob)!;
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return Runtime.PyLong_FromLongLong(Convert.ToInt64(self.inst));
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}
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static NewReference DoConvertUInt(BorrowedReference ob)
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{
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var self = (CLRObject)GetManagedObject(ob)!;
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return Runtime.PyLong_FromUnsignedLongLong(Convert.ToUInt64(self.inst));
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}
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static NewReference DoConvertBooleanInt(BorrowedReference ob)
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{
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var self = (CLRObject)GetManagedObject(ob)!;
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return Runtime.PyInt_FromInt32((bool)self.inst ? 1 : 0);
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}
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static NewReference DoConvertFloat(BorrowedReference ob)
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{
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var self = (CLRObject)GetManagedObject(ob)!;
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return Runtime.PyFloat_FromDouble(Convert.ToDouble(self.inst));
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}
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static IEnumerable<MethodInfo> GetCallImplementations(Type type)
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=> type.GetMethods(BindingFlags.Public | BindingFlags.Instance)
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.Where(m => m.Name == "__call__");
@@ -564,6 +595,29 @@ public virtual void InitializeSlots(BorrowedReference pyType, SlotsHolder slotsH
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{
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TypeManager.InitializeSlotIfEmpty(pyType, TypeOffset.mp_length, new Interop.B_P(MpLengthSlot.impl), slotsHolder);
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}
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switch (Type.GetTypeCode(type.Value))
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{
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case TypeCode.Boolean:
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case TypeCode.SByte:
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case TypeCode.Int16:
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case TypeCode.Int32:
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case TypeCode.Int64:
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TypeManager.InitializeSlotIfEmpty(pyType, TypeOffset.nb_int, new Interop.B_N(DoConvertInt), slotsHolder);
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TypeManager.InitializeSlotIfEmpty(pyType, TypeOffset.nb_float, new Interop.B_N(DoConvertFloat), slotsHolder);
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break;
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case TypeCode.Byte:
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case TypeCode.UInt16:
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case TypeCode.UInt32:
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case TypeCode.UInt64:
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TypeManager.InitializeSlotIfEmpty(pyType, TypeOffset.nb_int, new Interop.B_N(DoConvertUInt), slotsHolder);
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TypeManager.InitializeSlotIfEmpty(pyType, TypeOffset.nb_float, new Interop.B_N(DoConvertFloat), slotsHolder);
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break;
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case TypeCode.Double:
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case TypeCode.Single:
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TypeManager.InitializeSlotIfEmpty(pyType, TypeOffset.nb_float, new Interop.B_N(DoConvertFloat), slotsHolder);
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break;
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}
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}
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public virtual bool HasCustomNew() => this.GetType().GetMethod("tp_new") is not null;

‎src/runtime/Types/OperatorMethod.cs‎

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@@ -53,6 +53,7 @@ static OperatorMethod()
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["op_UnaryPlus"] = new SlotDefinition("__pos__", TypeOffset.nb_positive),
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["__int__"] = new SlotDefinition("__int__", TypeOffset.nb_int),
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["__float__"] = new SlotDefinition("__float__", TypeOffset.nb_float),
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};
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ComparisonOpMap = new Dictionary<string, string>
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{

‎tests/test_conversion.py‎

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@@ -720,3 +720,28 @@ def test_intptr_construction():
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with pytest.raises(OverflowError):
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UIntPtr(v)
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def test_explicit_conversion():
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from System import (
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Int64, UInt64, Int32, UInt32, Int16, UInt16, Byte, SByte, Boolean
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)
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from System import Double, Single
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assert int(Boolean(False)) == 0
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assert int(Boolean(True)) == 1
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for t in [UInt64, UInt32, UInt16, Byte]:
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assert int(t(127)) == 127
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assert float(t(127)) == 127.0
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for t in [Int64, Int32, Int16, SByte]:
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assert int(t(127)) == 127
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assert int(t(-127)) == -127
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assert float(t(127)) == 127.0
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assert float(t(-127)) == -127.0
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assert int(Int64.MaxValue) == 2**63 - 1
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assert int(Int64.MinValue) == -2**63
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assert int(UInt64.MaxValue) == 2**64 - 1
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for t in [Single, Double]:
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assert float(t(0.125)) == 0.125

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