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Apr 1, 2020
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Update docs/HowSwiftImportsCAPIs.md #30747

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12 changes: 6 additions & 6 deletions docs/HowSwiftImportsCAPIs.md
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Original file line number Diff line number Diff line change
Expand Up @@ -315,8 +315,8 @@ void drawStringRenamed(const char *, int xPos, int yPos)
```swift
// C header imported in Swift.

func drawString(_: UnsafePointer<CChar>!, _ xPos: Int, _ yPos: Int)
func drawStringRenamed(_: UnsafePointer<CChar>!, x: Int, y: Int)
func drawString(_: UnsafePointer<CChar>!, _ xPos: CInt, _ yPos: CInt)
func drawStringRenamed(_: UnsafePointer<CChar>!, x: CInt, y: CInt)

drawString("hello", 10, 20)
drawStringRenamed("hello", x: 10, y: 20)
Expand Down Expand Up @@ -602,9 +602,9 @@ memory layout.

As discussed above, there are cases where bridging that adjusts memory layout is
not possible, for example, when importing pointers to function pointers. For
example, while C's int `(*)(char)` can be imported as `(Int8) -> Int` (requires
example, while C's `int (*)(char)` can be imported as `(CChar) -> CInt` (requires
an adjustment of memory layout), C's `int (**)(char)` can't be imported as
`UnsafePointer<(Int8) -> Int>`, because the pointee must have identical memory
`UnsafePointer<(CChar) -> CInt>`, because the pointee must have identical memory
layout in C and in Swift.

Therefore, we need a Swift type that has a memory layout identical to C function
Expand Down Expand Up @@ -800,9 +800,9 @@ union IntOrFloat {

struct IntOrFloat {
var i: CInt { get set } // Computed property.
var f: Float { get set } // Computed property.
var f: CFloat { get set } // Computed property.
init(i: CInt)
init(f: Float)
init(f: CFloat)
init()
}
```
Expand Down