Module Stdlib.Bool

Contents

Instructions: Use this module in your project

In the IDE (CLion, Visual Studio Code, Xcode, etc.) you use for your DkSDK project:

  1. Add the following to your project's dependencies/CMakeLists.txt:

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    DkSDKProject_DeclareAvailable(ocaml
    CONSTRAINT "= 4.14.0"
    FINDLIBS str unix runtime_events threads dynlink)
DkSDKProject_MakeAvailable(ocaml)

  2. Add the Findlib::ocaml library to any desired targets in src/*/CMakeLists.txt:

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    target_link_libraries(YourPackage_YourLibraryName
     # ... existing libraries, if any ...
     Findlib::ocaml)

  3. Click your IDE's Build button

Not using DkSDK?

FIRST, do one or all of the following:

  1. Run:

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    opam install ocaml.4.14.0

  2. Edit your dune-project and add:

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    (package
  (name YourExistingPackage)
  (depends
  ; ... existing dependenices ...
  (ocaml (>= 4.14.0))))

    Then run:

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    dune build *.opam # if this fails, run: dune build

  3. Edit your <package>.opam file and add:

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    depends: [
  # ... existing dependencies ...
  "ocaml" {>= "4.14.0"}
]

    Then run:

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    opam install . --deps-only

FINALLY, add the library to any desired (library)and/or (executable) targets in your **/dune files:

Copy
(library
  (name YourLibrary)
  ; ... existing library options ...
  (libraries
    ; ... existing libraries ...
    ))

(executable
  (name YourExecutable)
  ; ... existing executable options ...
  (libraries
    ; ... existing libraries ...
    ))

Booleans

typet`` = bool`` =

    

  1. 

| false
    

  1. 

| true

The type of booleans (truth values).

The constructors false and true are included here so that they have paths, but they are not intended to be used in user-defined data types.

valnot : ``bool-> bool

not b is the boolean negation of b.

val(&&) : ``bool->``bool-> bool

e0 && e1 is the lazy boolean conjunction of expressions e0 and e1. If e0 evaluates to false, e1 is not evaluated. Right-associative operator at precedence level 3/11.

val(||) : ``bool->``bool-> bool

e0 || e1 is the lazy boolean disjunction of expressions e0 and e1. If e0 evaluates to true, e1 is not evaluated. Right-associative operator at precedence level 2/11.

Predicates and comparisons

valequal : ``bool->``bool-> bool

equal b0 b1 is true if and only if b0 and b1 are both true or both false.

valcompare : ``bool->``bool-> int

compare b0 b1 is a total order on boolean values. false is smaller than true.

Converting

valto_int : ``bool-> int

to_int b is 0 if b is false and 1 if b is true.

valto_float : ``bool-> float

to_float b is 0. if b is false and 1. if b is true.

valto_string : ``bool-> string

to_string b is "true" if b is true and "false" if b is false.

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