Go feature: Modernized go fix
19 hours ago
- #code modernization
- #static analysis
- #Go programming
- The `go fix` command has been modernized using the Go analysis framework, the same infrastructure as `go vet`.
- `go fix` and `go vet` serve different purposes: `go vet` reports problems, while `go fix` modernizes code with safe fixes.
- The new `go fix` supports flags like `-diff` for patch previews and `-fixtool` for custom analyzers.
- A list of analyzers is provided, including `any` (replaces `interface{}` with `any`), `bloop` (updates benchmark loops), and `fmtappendf` (optimizes string allocations).
- Other analyzers include `forvar` (removes shadowing), `hostport` (improves IPv6 support), and `inline` (inlines functions).
- Additional analyzers like `mapsloop`, `minmax`, and `newexpr` simplify map operations, conditional logic, and pointer creation.
- The `omitzero` analyzer removes ineffective `omitempty` tags, while `plusbuild` removes obsolete build comments.
- Modern loops (`rangeint`), reflection (`reflecttypefor`), and string operations (`stringsbuilder`, `stringscut`) are optimized.
- Testing improvements include `testingcontext` for test contexts and `waitgroup` for simplified goroutine synchronization.