Deep dive into Swift literals
summary
Tracks how Swift turns literal syntax into runtime objects by following a literal (e.g., the integer 42) from source through SIL to LLVM IR, showing compiler flags used to emit that IR and inspecting generated objects like builtin.int64. Explains how literal-conversion protocols (IntegerLiteralConvertible / ExpressibleBy...) and Intrinsic Protocols allow literals to be exploited, covers the Swift 5.0 priority change for choosing literal initializers, and gives concrete examples including CoreGraphics CGFloat conversions with matching generated IR.
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