1
0
mirror of https://github.com/golang/go synced 2024-11-06 05:26:11 -07:00
Commit Graph

6 Commits

Author SHA1 Message Date
Rob Pike
575b88be8f stringer: avoid if's in the generated code
Suggestion by dsymonds: Save code not data.
Add an extra element to the index array and an if can be eliminated.

Old generated code:
const _Day_name = "MondayTuesdayWednesdayThursdayFridaySaturdaySunday"

var _Day_index = [...]uint8{6, 13, 22, 30, 36, 44, 50}

func (i Day) String() string {
	if i < 0 || i >= Day(len(_Day_index)) {
		return fmt.Sprintf("Day(%d)", i)
	}
	hi := _Day_index[i]
	lo := uint8(0)
	if i > 0 {
		lo = _Day_index[i-1]
	}
	return _Day_name[lo:hi]
}

New generated code:
const _Day_name = "MondayTuesdayWednesdayThursdayFridaySaturdaySunday"

var _Day_index = [...]uint8{0, 6, 13, 22, 30, 36, 44, 50}

func (i Day) String() string {
	if i < 0 || i+1 >= Day(len(_Day_index)) {
		return fmt.Sprintf("Day(%d)", i)
	}
	return _Day_name[_Day_index[i]:_Day_index[i+1]]
}

Change-Id: I6f46a4892d5813a12ec1ad01738c6a21c7e45172
Reviewed-on: https://go-review.googlesource.com/1990
Reviewed-by: David Symonds <dsymonds@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2014-12-22 20:58:05 +00:00
Rob Pike
d03e8a67df go.tools/cmd/stringer: delete needless subtraction of zero in generated code
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/136270043
2014-09-05 17:05:28 -07:00
Rob Pike
d0448f16e3 go.tools/cmd/stringer: add end-to-end test that compiles, runs, and verifies the generated method
In the process, fix a bug in one of the method generators.

LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/141130043
2014-09-05 15:42:23 -07:00
Rob Pike
75b67f833e go.tools/cmd/stringer: fix generated map code
Missed comment from previous code review.
Next up: execution tests so this won't happen again

LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/134480043
2014-09-04 16:18:38 -07:00
Rob Pike
22ede605a7 go.tools/cmd/stringer: use const for names, slice for map strings
Improve the generated code by using a const instead of a var for the names string.
This requires some refactoring to get neat const() and var() blocks.
Also change the generate map code go use a single sliced string, to reduce the
size of the compiled representation (only one string value).

LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/135450044
2014-09-04 16:06:51 -07:00
Rob Pike
9207f67279 go.tools/cmd/stringer: add tests
Refactor a little to make testing easier.
Add golden tests and a check fo splitIntoRuns, which is the subtlest piece.
Still to come: execution tests.

Also fix a few issues in the generated code.

LGTM=gri
R=gri
CC=golang-codereviews, josharian
https://golang.org/cl/134450044
2014-09-04 14:16:59 -07:00