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| author | Ayke van Laethem <[email protected]> | 2023-07-07 15:58:08 +0200 |
|---|---|---|
| committer | Ron Evans <[email protected]> | 2023-07-07 18:12:57 +0200 |
| commit | fffad84a63488d2ffd6d143229412dc0913d5458 (patch) | |
| tree | a2b0ea459a6d636963150bd3e651225a5683293e | |
| parent | e075e0591d555d3e657858f5186627f412dd500f (diff) | |
| download | tinygo-fffad84a63488d2ffd6d143229412dc0913d5458.tar.gz tinygo-fffad84a63488d2ffd6d143229412dc0913d5458.zip | |
reflect: add SetZero
This was added in Go 1.20 and is required by encoding/json starting with
Go 1.21.
| -rw-r--r-- | src/reflect/all_test.go | 3 | ||||
| -rw-r--r-- | src/reflect/value.go | 10 |
2 files changed, 10 insertions, 3 deletions
diff --git a/src/reflect/all_test.go b/src/reflect/all_test.go index cb7e4d2ac..39fc7a374 100644 --- a/src/reflect/all_test.go +++ b/src/reflect/all_test.go @@ -1559,8 +1559,6 @@ func TestIsZero(t *testing.T) { t.Errorf("%d: IsZero(Zero(TypeOf((%s)(%+v)))) is false", i, x.Kind(), tt.x) } - /* // TODO(tinygo): missing SetZero support - p := New(x.Type()).Elem() p.Set(x) p.SetZero() @@ -1568,7 +1566,6 @@ func TestIsZero(t *testing.T) { t.Errorf("%d: IsZero((%s)(%+v)) is true after SetZero", i, p.Kind(), tt.x) } - */ } diff --git a/src/reflect/value.go b/src/reflect/value.go index 60df82686..2499fca78 100644 --- a/src/reflect/value.go +++ b/src/reflect/value.go @@ -1068,6 +1068,13 @@ func (v Value) Set(x Value) { memcpy(v.value, xptr, size) } +func (v Value) SetZero() { + v.checkAddressable() + v.checkRO() + size := v.typecode.Size() + memzero(v.value, size) +} + func (v Value) SetBool(x bool) { v.checkAddressable() v.checkRO() @@ -1569,6 +1576,9 @@ func (e *ValueError) Error() string { //go:linkname memcpy runtime.memcpy func memcpy(dst, src unsafe.Pointer, size uintptr) +//go:linkname memzero runtime.memzero +func memzero(ptr unsafe.Pointer, size uintptr) + //go:linkname alloc runtime.alloc func alloc(size uintptr, layout unsafe.Pointer) unsafe.Pointer |