package ppx_expect_nobase

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Cram like framework for OCaml (with stripped dependencies)

Install 

dune-project
 Dependency

github.com Changelog MIT License Edit opam file Versions (4)

Authors

  1. J
    Jane Street Group, LLC

Maintainers

  1. J
    Jane Street Group, LLC
  2. D
    Dmitrii Kosarev a.k.a. Kakadu

Sources

ppx_expect_nobase-0.17.3.2.tbz
sha256=d918035e8cc2765e691c1e9d22bda5983569ec7bc7c2da60424b4207c7c71aae
sha512=b708a075e154adc51494d84a88a120c759929fb021c3993dcfe6037c9ba143a379a8dc2550970e1134c744e0a9eec62df6f92bf5764d845164510a191b85d0f7

doc/ppx_expect_nobase.wrappers/Wrappers/Option/index.html

Module Wrappers.OptionSource

include module type of struct include Option end

Options

Sourcetype 'a t = 'a option =
  1. | None
  2. | Some of 'a

The type for option values. Either None or a value Some v.

Sourceval none : 'a option

none is None.

Sourceval some : 'a -> 'a option

some v is Some v.

Sourceval get : 'a option -> 'a

get o is v if o is Some v and raise otherwise.

Sourceval join : 'a option option -> 'a option

join oo is Some v if oo is Some (Some v) and None otherwise.

Sourceval product : 'a option -> 'b option -> ('a * 'b) option

product o0 o1 is Some (v0, v1) if o0 is Some v0 and o1 is Some v1 and None otherwise.

  • since 5.5
Sourceval fold : none:'a -> some:('b -> 'a) -> 'b option -> 'a

fold ~none ~some o is none if o is None and some v if o is Some v.

Sourceval blend : ('a -> 'a -> 'a) -> 'a option -> 'a option -> 'a option

blend f o1 o2 is o1 if o2 is None, o2 if o1 is None, and Some (f v1 v2) if o1 is Some v1 and o2 is Some v2.

  • since 5.5
Sourceval for_all : ('a -> bool) -> 'a option -> bool

for_all p behaves like List.for_all p on a list of zero or one element:

  • for_all p None is true,
  • for_all p (Some v) is p v.
  • since 5.5
Sourceval exists : ('a -> bool) -> 'a option -> bool

exists p behaves like List.exists p on a list of zero or one element:

  • exists p None is false,
  • exists p (Some v) is p v.
  • since 5.5

Predicates and comparisons

Sourceval is_none : 'a option -> bool

is_none o is true if and only if o is None.

Sourceval is_some : 'a option -> bool

is_some o is true if and only if o is Some o.

Sourceval equal : ('a -> 'a -> bool) -> 'a option -> 'a option -> bool

equal eq o0 o1 is true if and only if o0 and o1 are both None or if they are Some v0 and Some v1 and eq v0 v1 is true.

Sourceval compare : ('a -> 'a -> int) -> 'a option -> 'a option -> int

compare cmp o0 o1 is a total order on options using cmp to compare values wrapped by Some _. None is smaller than Some _ values.

Converting

Sourceval to_result : none:'e -> 'a option -> ('a, 'e) result

to_result ~none o is Ok v if o is Some v and Error none otherwise.

Sourceval to_seq : 'a option -> 'a Seq.t

to_seq o is o as a sequence. None is the empty sequence and Some v is the singleton sequence containing v.

Syntax

Sourcemodule Syntax = Option.Syntax

Binding operators. See manual section 12.23 for details.

Sourceval to_list : 'a t -> 'a list
Sourceval bind : 'a option -> f:('a -> 'b option) -> 'b option
Sourceval value : 'a t -> default:'a -> 'a
Sourceval map : 'a t -> f:('a -> 'b) -> 'b t
Sourceval value_exn : 'a option -> 'a
Sourceval iter : f:('a -> unit) -> 'a t -> unit