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Add more default value documentation

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This commit is contained in:
Magnus Hallin 2017-02-26 12:56:07 +01:00
parent 47ce85bd72
commit b7a2f577ef
1 changed files with 11 additions and 3 deletions
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14
src/macros/object.rs
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@ -215,9 +215,17 @@ default value, _or_ make the type into an `Option<>`, the argument becomes
optional. For example:
```text
arg_name: String -- required
arg_name: Option<String> -- optional, None if unspecified
arg_name = "default": String -- optional "default" if unspecified
arg_name: i64 -- required
arg_name: Option<i64> -- optional, None if unspecified
arg_name = 123: i64 -- optional, "123" if unspecified
```
Due to some syntactical limitations in the macros, you must parentesize more
complex default value expressions:
```text
arg_name = (Point { x: 1, y: 2 }): Point
arg_name = ("default".to_owned()): String
```
[1]: struct.Executor.html