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Add __new__ function and property of slice #99

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Merged
merged 2 commits into from
Sep 29, 2019
Merged

Add __new__ function and property of slice #99

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58b0bf5
Add __new__ function and property of slice
HyeockJinKim Sep 29, 2019
a604dc8
Add tests for slice
HyeockJinKim Sep 29, 2019
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2 changes: 1 addition & 1 deletion builtin/builtin.go
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Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,7 @@ func init() {
"range": py.RangeType,
// "reversed": py.ReversedType,
"set": py.SetType,
// "slice": py.SliceType,
"slice": py.SliceType,
"staticmethod": py.StaticMethodType,
"str": py.StringType,
// "super": py.SuperType,
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25 changes: 23 additions & 2 deletions py/slice.go
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Expand Up @@ -13,11 +13,11 @@ type Slice struct {
Step Object
}

var SliceType = NewType("slice", `slice(stop) -> slice object
var SliceType = NewTypeX("slice", `slice(stop) -> slice object
"slice(stop)
slice(start, stop[, step])

Create a slice object. This is used for extended slicing (e.g. a[0:10:2]).`)
Create a slice object. This is used for extended slicing (e.g. a[0:10:2]).`, SliceNew, nil)

// Type of this object
func (o *Slice) Type() *Type {
Expand Down Expand Up @@ -151,4 +151,25 @@ func (r *Slice) GetIndices(length int) (start, stop, step, slicelength int, err
return
}

func init() {
SliceType.Dict["start"] = &Property{
Fget: func(self Object) (Object, error) {
selfSlice := self.(*Slice)
return selfSlice.Start, nil
},
}
SliceType.Dict["stop"] = &Property{
Fget: func(self Object) (Object, error) {
selfSlice := self.(*Slice)
return selfSlice.Stop, nil
},
}
SliceType.Dict["step"] = &Property{
Fget: func(self Object) (Object, error) {
selfSlice := self.(*Slice)
return selfSlice.Step, nil
},
}
}

// Check interface is satisfied
16 changes: 16 additions & 0 deletions py/tests/slice.py
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@@ -0,0 +1,16 @@
# Copyright 2019 The go-python Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

doc="slice"
a = slice(10)
assert a.start == None
assert a.stop == 10
assert a.step == None

a = slice(0, 10, 1)
assert a.start == 0
assert a.stop == 10
assert a.step == 1

doc="finished"