custom result-builder attributes

Swift ⟩ Attributes ⟩ Result Builders ⟩

⭐️ 重點

Creating a result builder type creates a custom attribute with the same name.

custom attribute can be applied on:

• function declaration:

• variable/subscript declaration that includes a getter:

• closure parameter in a function declaration:

the result builder builds the body of the function/getter/closure.

• Applying a result builder attribute doesn’t impact ABI compatibility.

• Applying a result builder attribute to a parameter does make that attribute part of the function’s interface, which can effect source compatibility.

📘 手冊