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internal/lib/reflect: makemap

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This commit is contained in:
visualfc
2024-11-27 10:32:19 +08:00
parent ecba13c38e
commit 2412760f1c
2 changed files with 101 additions and 6 deletions
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34
internal/lib/reflect/value.go
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@@ -2297,9 +2297,9 @@ func (v Value) MapIndex(key Value) Value {
} else {
k = unsafe.Pointer(&key.ptr)
}
e = mapaccess(v.typ(), v.pointer(), k)
// }
if e == nil {
var ok bool
e, ok = mapaccess(v.typ(), v.pointer(), k)
if !ok {
return Value{}
}
typ := tt.Elem
@@ -2519,7 +2519,7 @@ func (v Value) MapRange() *MapIter {
// Force slow panicking path not inlined, so it won't add to the
// inlining budget of the caller.
// TODO: undo when the inliner is no longer bottom-up only.
// TODO undo when the inliner is no longer bottom-up only.
//
//go:noinline
func (f flag) panicNotMap() {
@@ -2587,11 +2587,14 @@ func chancap(ch unsafe.Pointer) int
//go:linkname chanlen github.com/goplus/llgo/internal/runtime.ChanLen
func chanlen(ch unsafe.Pointer) int
//go:linkname makemap github.com/goplus/llgo/internal/runtime.MakeMap
func makemap(t *abi.Type, cap int) (m unsafe.Pointer)
//go:linkname maplen github.com/goplus/llgo/internal/runtime.MapLen
func maplen(ch unsafe.Pointer) int
//go:linkname mapaccess github.com/goplus/llgo/internal/runtime.MapAccess1
func mapaccess(t *abi.Type, m unsafe.Pointer, key unsafe.Pointer) (val unsafe.Pointer)
//go:linkname mapaccess github.com/goplus/llgo/internal/runtime.MapAccess2
func mapaccess(t *abi.Type, m unsafe.Pointer, key unsafe.Pointer) (val unsafe.Pointer, ok bool)
//go:linkname mapassign0 github.com/goplus/llgo/internal/runtime.MapAssign
func mapassign0(t *abi.Type, m unsafe.Pointer, key unsafe.Pointer) unsafe.Pointer
@@ -2635,6 +2638,9 @@ func mapiternext(it *hiter)
//go:linkname mapclear github.com/goplus/llgo/internal/runtime.mapclear
func mapclear(t *abi.Type, m unsafe.Pointer)
//go:linkname typehash github.com/goplus/llgo/internal/runtime.typehash
func typehash(t *abi.Type, p unsafe.Pointer, h uintptr) uintptr
// MakeSlice creates a new zero-initialized slice value
// for the specified slice type, length, and capacity.
func MakeSlice(typ Type, len, cap int) Value {
@@ -2655,6 +2661,22 @@ func MakeSlice(typ Type, len, cap int) Value {
return Value{&typ.(*rtype).t, unsafe.Pointer(&s), flagIndir | flag(Slice)}
}
// MakeMap creates a new map with the specified type.
func MakeMap(typ Type) Value {
return MakeMapWithSize(typ, 0)
}
// MakeMapWithSize creates a new map with the specified type
// and initial space for approximately n elements.
func MakeMapWithSize(typ Type, n int) Value {
if typ.Kind() != Map {
panic("reflect.MakeMapWithSize of non-map type")
}
t := typ.common()
m := makemap(t, n)
return Value{t, m, flag(Map)}
}
func ifaceE2I(t *abi.Type, src any, dst unsafe.Pointer) {
panic("todo: reflect.ifaceE2I")
}