Add transform to MACRO_CASE and phrase

README.md

@@ -128,7 +128,7 @@ For example, the command `enumer -type=MyType -json -transform=snake` would gene
 ```go
 name := MyTypeValue.String() // name => "my_type_value"
 ```
-**Note**: The transformation only works form CamelCase to snake_case or kebab-case, not the other way around.
+**Note**: The transformation only works from CamelCase to snake_case or kebab-case, not the other way around.
 
 ## How to use
 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)
@@ -139,7 +139,8 @@ There are four boolean flags: `json`, `text`, `yaml` and `sql`. You can use any
 
 For enum string representation transformation the `transform` and `trimprefix` flags
 were added (i.e. `enumer -type=MyType -json -transform=snake`).
-Possible transform values are `snake` and `kebab` for transformation to snake_case and kebab-case accordingly.
+Possible transform values are `snake`, `kebab` `macro` and `phrase` for transformation
+to snake_case, kebab-case, MACRO_CASE or a phrase (i.e. space-separated words) accordingly.
 The default value for `transform` flag is `noop` which means no transformation will be performed.
 
 If a prefix is provided via the `trimprefix` flag, it will be trimmed from the start of each name (before

stringer.go

@@ -316,6 +316,14 @@ func (g *Generator) transformValueNames(values []Value, transformMethod string)
 		sep = '_'
 	case "kebab":
 		sep = '-'
+	case "phrase":
+		sep = ' '
+	case "macro":
+		sep = '_'
+		for i := range values {
+			values[i].name = strings.ToUpper(name.Delimit(values[i].name, sep))
+		}
+		return
 	default:
 		return
 	}