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Add a struct called Source that holds the function, file and line of a location in the program's source code. When HandleOptions.AddSource is true, the ReplaceAttr function will get an Attr whose key is SourceKey and whose value is a *Source. We use *Source instead of Source to save an allocation. The pointer and the value each cause one allocation up front: the pointer when it is created, and the value when it is assigned to the `any` field of a slog.Value (handle.go:283). If a ReplaceAttr function wanted to modify a Source value, it would have to create a new slog.Value to return, causing a second allocation, but the function can modify a *Source in place. TextHandler displays a Source as "file:line". JSONHandler displays a Source as a group of its non-zero fields. This replaces the previous design, where source location was always a string with the format "file:line". The new design gives users more control over how to output and consume source locations. Fixes #59280. Change-Id: I84475abd5ed83fc354b50e34325c7b246cf327c7 Reviewed-on: https://go-review.googlesource.com/c/go/+/486376 TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Jonathan Amsterdam <jba@google.com> Reviewed-by: Alan Donovan <adonovan@google.com>
6 lines
201 B
Plaintext
6 lines
201 B
Plaintext
pkg log/slog, type Source struct #59280
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pkg log/slog, type Source struct, File string #59280
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pkg log/slog, type Source struct, Function string #59280
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pkg log/slog, type Source struct, Line int #59280
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