Specify a bridging header to swiftc
suggest changeThe -import-objc-header
flag specifies a header for swiftc
to import:
// defs.h
struct Color {
int red, green, blue;
};
#define MAX_VALUE 255
// demo.swift
extension Color: CustomStringConvertible { // extension on a C struct
public var description: String {
return "Color(red: \(red), green: \(green), blue: \(blue))"
}
}
print("MAX_VALUE is: \(MAX_VALUE)") // C macro becomes a constant
let color = Color(red: 0xCA, green: 0xCA, blue: 0xD0) // C struct initializer
print("The color is \(color)")
-import-objc-header defs.h
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