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reflect: fix stale Value.kind documentation

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The lowests fives bits are the kind, and the next five bits are attributes,
not the other way around.

Change-Id: I5e1d13b195b766e99f66bb1227cc7f84e85dc49d
Reviewed-on: https://go-review.googlesource.com/c/go/+/425185
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
This commit is contained in:
Joe Tsai 2022-08-23 19:27:49 -07:00 committed by Joseph Tsai
parent 027ff3f47d
commit cdb270cf07
1 changed files with 8 additions and 6 deletions
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14
src/reflect/value.go
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@ -45,17 +45,19 @@ type Value struct {
ptr unsafe.Pointer
// flag holds metadata about the value.
// The lowest bits are flag bits:
//
// The lowest five bits give the Kind of the value, mirroring typ.Kind().
//
// The next set of bits are flag bits:
// - flagStickyRO: obtained via unexported not embedded field, so read-only
// - flagEmbedRO: obtained via unexported embedded field, so read-only
// - flagIndir: val holds a pointer to the data
// - flagAddr: v.CanAddr is true (implies flagIndir)
// - flagAddr: v.CanAddr is true (implies flagIndir and ptr is non-nil)
// - flagMethod: v is a method value.
// The next five bits give the Kind of the value.
// This repeats typ.Kind() except for method values.
// The remaining 23+ bits give a method number for method values.
// If flag.kind() != Func, code can assume that flagMethod is unset.
// If ifaceIndir(typ), code can assume that flagIndir is set.
//
// The remaining 22+ bits give a method number for method values.
// If flag.kind() != Func, code can assume that flagMethod is unset.
flag
// A method value represents a curried method invocation