forked from mirror/enumer
Changed the flag noJSON to json
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README.md
11
README.md
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@ -3,7 +3,7 @@ Enumer is a tool to generate Go code that adds useful methods to Go enums (const
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It started as a fork of [Rob Pike’s Stringer tool](https://godoc.org/golang.org/x/tools/cmd/stringer).
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##Generated functions and methods
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When Enumer is applied to a type, it will generate three methods and one function:
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When Enumer is applied to a type, it will generate:
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* A method `String()` that returns the string representation of the enum value. This makes the enum conform
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the `Stringer` interface, so whenever you print an enum value, you'll get the string name instead of a number.
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@ -11,8 +11,8 @@ the `Stringer` interface, so whenever you print an enum value, you'll get the st
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when you need to read enum values from the command line arguments, from a configuration file,
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from a REST API request... In short, from those places where using the real enum value (an integer) would
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be almost meaningless or hard to trace or use by a human.
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* And two more methods, `MarshalJSON()` and `UnmarshalJSON()`, that makes the enum conform
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the `json.Marshaler` and `json.Unmarshaler` interfaces. Very useful to use it in JSON APIs.
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* When the flag `json` is provided, two more methods will be generated, `MarshalJSON()` and `UnmarshalJSON()`. Those make
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the enum conform the `json.Marshaler` and `json.Unmarshaler` interfaces. Very useful to use it in JSON APIs.
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For example, if we have an enum type called `Pill`,
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```go
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@ -26,7 +26,7 @@ const (
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Acetaminophen = Paracetamol
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)
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```
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executing `enumer -type=Pill` will generate a new file with four methods:
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executing `enumer -type=Pill -json` will generate a new file with four methods:
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```go
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func (i Pill) String() string {
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//...
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@ -72,8 +72,7 @@ The generated code is exactly the same as the Stringer tool plus the mentioned a
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The usage of Enumer is the same as Stringer, so you can refer to the [Stringer docs](https://godoc.org/golang.org/x/tools/cmd/stringer)
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for more information.
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There is only one flag added: `noJSON`. If this flag is set to true (i.e. `enumer -type=Pill -noJSON`),
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the JSON related methods won't be generated.
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As mentioned before, there is only one flag added: `json`.
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## Inspiring projects
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* [Stringer](https://godoc.org/golang.org/x/tools/cmd/stringer)
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@ -30,7 +30,7 @@ var golden = []Golden{
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{"prime", prime_in, prime_out},
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}
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var goldenJSON = []Golden {
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var goldenJSON = []Golden{
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{"prime", prime_json_in, prime_json_out},
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}
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@ -82,7 +82,7 @@ import (
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var (
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typeNames = flag.String("type", "", "comma-separated list of type names; must be set")
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noJSON = flag.Bool("noJSON", false, "if true, json marshaling methods will NOT be included. Default: false")
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json = flag.Bool("json", false, "if true, json marshaling methods will be generated. Default: false")
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output = flag.String("output", "", "output file name; default srcdir/<type>_string.go")
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)
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@ -134,13 +134,13 @@ func main() {
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g.Printf("package %s", g.pkg.name)
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g.Printf("\n")
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g.Printf("import \"fmt\"\n") // Used by all methods.
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if !*noJSON {
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if *json {
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g.Printf("import \"encoding/json\"\n")
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}
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// Run generate for each type.
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for _, typeName := range types {
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g.generate(typeName, !*noJSON)
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g.generate(typeName, *json)
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}
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// Format the output.
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