package containers

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Helpers for Format

  • since 0.8
type 'a sequence = ('a -> unit) -> unit
type 'a printer = t -> 'a -> unit

Combinators

val silent : 'a printer

Prints nothing

val unit : unit printer
val int : int printer
val string : string printer
val bool : bool printer
val float3 : float printer
val float : float printer
val char : char printer
  • since 0.14
val int32 : int32 printer
  • since 0.14
  • since 0.14
val int64 : int64 printer
  • since 0.14
  • since 0.14
val nativeint : nativeint printer
  • since 0.14
  • since 0.14
val string_quoted : string printer

Similar to CCString.print.

  • since 0.14
val list : ?start:string -> ?stop:string -> ?sep:string -> 'a printer -> 'a list printer
val array : ?start:string -> ?stop:string -> ?sep:string -> 'a printer -> 'a array printer
val arrayi : ?start:string -> ?stop:string -> ?sep:string -> (int * 'a) printer -> 'a array printer
val seq : ?start:string -> ?stop:string -> ?sep:string -> 'a printer -> 'a sequence printer
val opt : 'a printer -> 'a option printer
val pair : 'a printer -> 'b printer -> ('a * 'b) printer
val triple : 'a printer -> 'b printer -> 'c printer -> ('a * 'b * 'c) printer
val quad : 'a printer -> 'b printer -> 'c printer -> 'd printer -> ('a * 'b * 'c * 'd) printer
val map : ('a -> 'b) -> 'b printer -> 'a printer

ASCII codes

Use ANSI escape codes https://en.wikipedia.org/wiki/ANSI_escape_code to put some colors on the terminal.

This uses tags in format strings to specify the style. Current styles are the following:

  • "reset" resets style
  • "black"
  • "red"
  • "green"
  • "yellow"
  • "blue"
  • "magenta"
  • "cyan"
  • "white"
  • "Black" bold black
  • "Red" bold red
  • "Green" bold green
  • "Yellow" bold yellow
  • "Blue" bold blue
  • "Magenta" bold magenta
  • "Cyan" bold cyan
  • "White" bold white

Example:

set_color_default true;;

Format.printf
  "what is your @{<White>favorite color@}? @{<blue>blue@}! No, @{<red>red@}! Ahhhhhhh@.";;

status: experimental

  • since 0.15
val set_color_tag_handling : t -> unit

adds functions to support color tags to the given formatter.

  • since 0.15
val set_color_default : bool -> unit

set_color_default b enables color handling on the standard formatters (stdout, stderr) if b = true as well as on sprintf formatters; it disables the color handling if b = false.

IO

val output : t -> 'a printer -> 'a -> unit
val to_string : 'a printer -> 'a -> string
val stdout : t
val stderr : t
val sprintf : ('a, t, unit, string) format4 -> 'a

Print into a string any format string that would usually be compatible with fprintf. Similar to Format.asprintf.

val fprintf : t -> ('a, t, unit) format -> 'a

Alias to Format.fprintf

  • since 0.14
val ksprintf : f:(string -> 'b) -> ('a, Format.formatter, unit, 'b) format4 -> 'a

ksprintf fmt ~f formats using fmt, in a way similar to sprintf, and then calls f on the resulting string.

  • since 0.14
val to_file : string -> ('a, t, unit, unit) format4 -> 'a

Print to the given file

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