d75e186e2c
Sometimes when implementing a Formatter it's helpful to use the fmt package without invoking the formatter. This new function, FormatString, makes that easier in some cases by recreating the original formatting directive (such as "%3.2f") that caused Formatter.Format to be called. The original Formatter interface is probably not what we would design today, but we're stuck with it. FormatString, although it takes a State as an argument, compensates by making Formatter a little more flexible. The State does not include the verb so (unlike in the issue), we must provide it explicitly in the call to FormatString. Doing it there minimizes allocations by returning the complete format string. Fixes #51668 Updates #51195 Change-Id: Ie31c8256515864b2f460df45fbd231286b8b7a28 Reviewed-on: https://go-review.googlesource.com/c/go/+/400875 Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Run-TryBot: Russ Cox <rsc@golang.org> |
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