diff options
| author | griesemer <gri@golang.org> | 2017-10-18 15:31:42 -0700 |
|---|---|---|
| committer | Robert Griesemer <gri@golang.org> | 2017-10-19 15:30:37 +0000 |
| commit | 52dd39965e78260145091226490ee5510ea34ced (patch) | |
| tree | c691500a91efa03eb24dc53f83935bbe8b9abd5f /doc/go_spec.html | |
| parent | 58d7231b2f503f70955fb050f02ea8a0277db0fa (diff) | |
| download | go-52dd39965e78260145091226490ee5510ea34ced.tar.gz go-52dd39965e78260145091226490ee5510ea34ced.zip | |
spec: clarify that each block has its own version of iota
Issue #15550 is clearly an esoteric case but the spec was silent
about it and we had diverging implementations. By making `iota`
and index that is relative to the respective constant declaration,
nested const declarations won't affect outer values of `iota`.
cmd/compile and go/types already follow this semantics.
Fixes #15550.
Change-Id: If138189e3ea4373f8ba50ac6fb1d219b481f8698
Reviewed-on: https://go-review.googlesource.com/71750
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'doc/go_spec.html')
| -rw-r--r-- | doc/go_spec.html | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/go_spec.html b/doc/go_spec.html index fd3830dcf0..3cb221ce6c 100644 --- a/doc/go_spec.html +++ b/doc/go_spec.html @@ -1,6 +1,6 @@ <!--{ "Title": "The Go Programming Language Specification", - "Subtitle": "Version of October 17, 2017", + "Subtitle": "Version of October 18, 2017", "Path": "/ref/spec" }--> @@ -1866,8 +1866,8 @@ const ( <p> Within a <a href="#Constant_declarations">constant declaration</a>, the predeclared identifier <code>iota</code> represents successive untyped integer <a href="#Constants"> -constants</a>. It is reset to 0 whenever the reserved word <code>const</code> -appears in the source and increments after each <a href="#ConstSpec">ConstSpec</a>. +constants</a>. Its value is the index of the respective <a href="#ConstSpec">ConstSpec</a> +in that constant declaration, starting at zero. It can be used to construct a set of related constants: </p> |