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DesignDetail.md

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Design Detail

key.offset

key.offset is a reference(file offset) from origin instance. By SourceKit.

Example key.offset

func xxx() {
    let xxx = XXX()
//      ^ <─────────────┐
    // closure          │
    { [weak self, yyy = xxx] _ in
//          ^     ^
//          │     └──── yyy
//          └──── self
    }
}

The self's key.offset

class XXX {
    func xxx() {
//       ^
//       └────┐
        print(self)
    }

    lazy var yyy: Int = {
//           ^
//           └┐
        print(self)
        return 1
    }()

    var zzz: XXX {
//               ^
//            ┌──┘
        print(self)
    }
}

Targets

  • Blocks
    • closure blocks
    • function blocks
  • ID

Find Blocks. By SwiftSyntax

func xxx() {
//         ^
}

var xxx: XXX {
//           ^
}

    { [weak self, yyy = xxx] _ in
//  ^
    }

Find ID(IdentifierExprSyntax). By SwiftSyntax

func xxx() {
    abc.xxx()
//  ^
    abc.xxx
//  ^
    XXX()
//  ^
}

例外

XCTAssertEqual(code.kind, .refVarGlobal)
XCTAssertEqual(code.kind, .refVarStatic)

obj ref function leak 目標

xxx(obj.f)

TODO

  • ignore defer block
  • yaml setting
    • skip function
    • skip type
  • refine skip function impl