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pythonnet/src/runtime/Util/OpsHelper.cs at v3.2.0 · pythonnet/pythonnet · GitHub
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runtime
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Util
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OpsHelper.cs
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using
System
;
using
System
.
Linq
.
Expressions
;
using
System
.
Reflection
;
using
static
Python
.
Runtime
.
OpsHelper
;
namespace
Python
.
Runtime
{
static
class
OpsHelper
{
public
static
BindingFlags
BindingFlags
=>
BindingFlags
.
Public
|
BindingFlags
.
Static
;
public
static
Func
<
T
,
T
,
T
>
Binary
<
T
>
(
Func
<
Expression
,
Expression
,
Expression
>
func
)
{
var
a
=
Expression
.
Parameter
(
typeof
(
T
)
,
"a"
)
;
var
b
=
Expression
.
Parameter
(
typeof
(
T
)
,
"b"
)
;
var
body
=
func
(
a
,
b
)
;
var
lambda
=
Expression
.
Lambda
<
Func
<
T
,
T
,
T
>
>
(
body
,
a
,
b
)
;
return
lambda
.
Compile
(
)
;
}
public
static
Func
<
T
,
T
>
Unary
<
T
>
(
Func
<
Expression
,
Expression
>
func
)
{
var
value
=
Expression
.
Parameter
(
typeof
(
T
)
,
"value"
)
;
var
body
=
func
(
value
)
;
var
lambda
=
Expression
.
Lambda
<
Func
<
T
,
T
>
>
(
body
,
value
)
;
return
lambda
.
Compile
(
)
;
}
public
static
bool
IsOpsHelper
(
this
MethodBase
method
)
=>
method
.
DeclaringType
.
GetCustomAttribute
<
OpsAttribute
>
(
)
is
not
null
;
public
static
Expression
EnumUnderlyingValue
(
Expression
enumValue
)
=>
Expression
.
Convert
(
enumValue
,
enumValue
.
Type
.
GetEnumUnderlyingType
(
)
)
;
}
[
AttributeUsage
(
AttributeTargets
.
Class
,
AllowMultiple
=
false
)
]
internal
class
OpsAttribute
:
Attribute
{
}
[
Ops
]
internal
static
class
FlagEnumOps
<
T
>
where
T
:
Enum
{
static
readonly
Func
<
T
,
T
,
T
>
and
=
BinaryOp
(
Expression
.
And
)
;
static
readonly
Func
<
T
,
T
,
T
>
or
=
BinaryOp
(
Expression
.
Or
)
;
static
readonly
Func
<
T
,
T
,
T
>
xor
=
BinaryOp
(
Expression
.
ExclusiveOr
)
;
static
readonly
Func
<
T
,
T
>
invert
=
UnaryOp
(
Expression
.
OnesComplement
)
;
#pragma warning disable
IDE1006
public
static
T
op_BitwiseAnd
(
T
a
,
T
b
)
=>
and
(
a
,
b
)
;
public
static
T
op_BitwiseOr
(
T
a
,
T
b
)
=>
or
(
a
,
b
)
;
public
static
T
op_ExclusiveOr
(
T
a
,
T
b
)
=>
xor
(
a
,
b
)
;
public
static
T
op_OnesComplement
(
T
value
)
=>
invert
(
value
)
;
#pragma warning restore
IDE1006
static
Expression
FromNumber
(
Expression
number
)
=>
Expression
.
Convert
(
number
,
typeof
(
T
)
)
;
static
Func
<
T
,
T
,
T
>
BinaryOp
(
Func
<
Expression
,
Expression
,
BinaryExpression
>
op
)
{
return
Binary
<
T
>
(
(
a
,
b
)
=>
{
var
numericA
=
EnumUnderlyingValue
(
a
)
;
var
numericB
=
EnumUnderlyingValue
(
b
)
;
var
numericResult
=
op
(
numericA
,
numericB
)
;
return
FromNumber
(
numericResult
)
;
}
)
;
}
static
Func
<
T
,
T
>
UnaryOp
(
Func
<
Expression
,
UnaryExpression
>
op
)
{
return
Unary
<
T
>
(
value
=>
{
var
numeric
=
EnumUnderlyingValue
(
value
)
;
var
numericResult
=
op
(
numeric
)
;
return
FromNumber
(
numericResult
)
;
}
)
;
}
}
[
Ops
]
internal
static
class
EnumOps
<
T
>
where
T
:
Enum
{
[
ForbidPythonThreads
]
#pragma warning disable
IDE1006
// Naming Styles - must match Python
public
static
PyInt
__index__
(
T
value
)
#pragma warning restore
IDE1006
// Naming Styles
=>
typeof
(
T
)
.
GetEnumUnderlyingType
(
)
==
typeof
(
UInt64
)
?
new
PyInt
(
Convert
.
ToUInt64
(
value
)
)
:
new
PyInt
(
Convert
.
ToInt64
(
value
)
)
;
[
ForbidPythonThreads
]
#pragma warning disable
IDE1006
// Naming Styles - must match Python
public
static
PyInt
__int__
(
T
value
)
=>
__index__
(
value
)
;
#pragma warning restore
IDE1006
// Naming Styles
}
}
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