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The section above mentions specifically translating either "init" or "initWith" from initializers. I'm curious if they're also pattern matching the "colorWith"

The section above mentions specifically translating either "init" or "initWith" from initializers. I'm curious if they're also pattern matching the "colorWith" prefix or if its more complicated.

JimDabell 12y ago
I think you might have missed my point: the `initWith` translation produces the Swift constructor that the documentation you quoted presents as the factory method equivalent. The `colorWith` factory method is useless in this context because a matching `initWith` initialiser exists. If the factory method were pattern matched in the same way, it would break things because it would produce a constructor with the same method signature as the translated initialiser.
- jackhlaw 12y ago
  We actually _do_ pattern match UIColor colorWith and turn it into an initializer. If there are two initializers after we pattern match (e.g., UIColor colorWith and initWith), we eliminate the duplicate.
  - seanalltogether 12y ago
    Are there other pattern matches that can get triggered? I've come across classes that initialize with "For" as in [MyClass classForString:str] or similar.
    - jayrhynas 12y ago
      From what I've been able to figure out just by playing around, the following rules are used: 1. Return type is `instancetype` or `MyClassName *` 2. Method takes at least one argument 3. Method name starts with a "class suffix"; that is, a suffix of the class name, with the restriction that you can't have partial words. The first letter may optionally be lower case. The class suffix (optionally followed by "With" like in the `initWith` conversion) is stripped off and the rest of the method name is used for the first parameter, with the first letter lower-cased. For example, the following conversions apply: +[MyClassName myClassNameWithObject:obj] -> MyClassName(object: obj) +[MyClassName classNameWithObject:obj] -> MyClassName(object: obj) +[MyClassName nameObject:obj] -> MyClassName(object: obj); However, since those all map to the same swift initializer, only one will be available (generally the first one declared)

The section above mentions specifically translating either "init" or "initWith" from initializers. I'm curious if they're also pattern matching the "colorWith" prefix or if its more complicated.

JimDabell 12y ago

I think you might have missed my point: the `initWith` translation produces the Swift constructor that the documentation you quoted presents as the factory method equivalent. The `colorWith` factory method is useless in this context because a matching `initWith` initialiser exists. If the factory method were pattern matched in the same way, it would break things because it would produce a constructor with the same method signature as the translated initialiser.

jackhlaw 12y ago
We actually _do_ pattern match UIColor colorWith and turn it into an initializer. If there are two initializers after we pattern match (e.g., UIColor colorWith and initWith), we eliminate the duplicate.
- seanalltogether 12y ago
  Are there other pattern matches that can get triggered? I've come across classes that initialize with "For" as in [MyClass classForString:str] or similar.
  - jayrhynas 12y ago
    From what I've been able to figure out just by playing around, the following rules are used: 1. Return type is `instancetype` or `MyClassName *` 2. Method takes at least one argument 3. Method name starts with a "class suffix"; that is, a suffix of the class name, with the restriction that you can't have partial words. The first letter may optionally be lower case. The class suffix (optionally followed by "With" like in the `initWith` conversion) is stripped off and the rest of the method name is used for the first parameter, with the first letter lower-cased. For example, the following conversions apply: +[MyClassName myClassNameWithObject:obj] -> MyClassName(object: obj) +[MyClassName classNameWithObject:obj] -> MyClassName(object: obj) +[MyClassName nameObject:obj] -> MyClassName(object: obj); However, since those all map to the same swift initializer, only one will be available (generally the first one declared)