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70 lines
1.4 KiB
Markdown
70 lines
1.4 KiB
Markdown
# exhaustive
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[](https://godoc.org/github.com/nishanths/exhaustive)
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[](https://travis-ci.org/nishanths/exhaustive)
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The `exhaustive` package and command line program can be used to detect
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enum switch statements that are not exhaustive.
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An enum switch statement is exhaustive if it has cases for each of the enum's members. See godoc for the definition of enum used by the program.
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The `exhaustive` package provides an `Analyzer` that follows the guidelines
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described in the [go/analysis](https://godoc.org/golang.org/x/tools/go/analysis) package; this makes
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it possible to integrate into existing analysis driver programs.
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## Install
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```
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go get github.com/nishanths/exhaustive/...
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```
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## Docs
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https://godoc.org/github.com/nishanths/exhaustive
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## Example
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Given the code:
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```diff
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package token
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type Token int
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const (
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Add Token = iota
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Subtract
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Multiply
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+ Quotient
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+ Remainder
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)
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```
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```
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package calc
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import "token"
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func processToken(t token.Token) {
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switch t {
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case token.Add:
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...
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case token.Subtract:
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...
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case token.Multiply:
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...
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}
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}
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```
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Running the `exhaustive` command will print:
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```
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calc.go:6:2: missing cases in switch of type token.Token: Quotient, Remainder
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```
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Enums can also be defined using explicit constant values instead of `iota`.
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## License
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BSD 2-Clause
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