package stdint-literals

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Small PPX for fixed size integer literals

Install

Dune Dependency

Authors

Maintainers

Sources

1.0.tar.gz
md5=acbbd5654b6d4af1c1d575ba150fab58
sha512=2dc61cbfef677e669b6169efc483d76a7ca75f013ed02b8b194a4b30681306d4788a153b86e2d0ea725881840426c278c8949dfba752f612152c9d87e9a90565

README.md.html

Stdint literals

This small PPX rewriter allows you to write literals for some of stdint's types using single-character suffixes on integers:

  • u denotes an uint8

  • U denotes an uint16

  • i denotes an uint32

  • I denotes an uint64

  • w denotes an uint128

  • s denotes an int8

  • S denotes an int16

  • l denotes an int32 (default behavior in OCaml)

  • L denotes an int64 (default behavior in OCaml)

  • W denotes an int128

Usage

Add stdint-literals in your dune file as follows:

(executable
  (name example)
  (preprocess (pps stdint-literals))
  (libraries stdint))

Example

let simple_literals =
  let i8 = 42u in
  Format.printf "%a\n" Stdint.Uint8.printer i8 ;
  let i16 = 42U in
  Format.printf "%a\n" Stdint.Uint16.printer i16 ;
  let s8 = 42s in
  Format.printf "%a\n" Stdint.Int8.printer s8 ;
  let s16 = 42S in
  Format.printf "%a\n" Stdint.Int16.printer s16

let hex_literals = 
  Format.printf "%a\n" Stdint.Uint16.printer_hex Stdint.Uint16.(0xDDAAU + 0xAADDU)

Of course, this also work on hexadecimal (or octal) literals.

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