Provided by: ocaml-interp_4.01.0-3ubuntu3_amd64 bug

NAME

       ocaml - The OCaml interactive toplevel

SYNOPSIS

       ocaml [ options ] [ object-files ] [ script-file ]

DESCRIPTION

       The ocaml(1) command is the toplevel system for OCaml, that permits interactive use of the
       OCaml system through a read-eval-print loop. In this mode,  the  system  repeatedly  reads
       OCaml  phrases  from  the input, then typechecks, compiles and evaluates them, then prints
       the inferred type and result value, if any. The system prints a #  (sharp)  prompt  before
       reading each phrase.

       A toplevel phrase can span several lines. It is terminated by ;; (a double-semicolon). The
       syntax of toplevel phrases is as follows.

       The toplevel system is started by the command ocaml(1).   Phrases  are  read  on  standard
       input,  results  are  printed on standard output, errors on standard error. End-of-file on
       standard input terminates ocaml(1).

       If one or more object-files (ending in .cmo or .cma) are given, they are  loaded  silently
       before starting the toplevel.

       If  a  script-file  is  given,  phrases are read silently from the file, errors printed on
       standard error.  ocaml(1) exits after the execution of the last phrase.

OPTIONS

       The following command-line options are recognized by ocaml(1).

       -absname
              Show absolute filenames in error messages.

       -I directory
              Add the given directory to the list of directories searched for source and compiled
              files.  By  default,  the  current  directory  is searched first, then the standard
              library directory. Directories  added  with  -I  are  searched  after  the  current
              directory,  in  the  order in which they were given on the command line, but before
              the standard library directory.

              If the given directory starts with +, it is taken relative to the standard  library
              directory.  For  instance,  -I +labltk adds the subdirectory labltk of the standard
              library to the search path.

              Directories can also be added to the search path once the toplevel is running  with
              the #directory directive.

       -init file
              Load  the  given file instead of the default initialization file.  The default file
              is .ocamlinit in the current directory if it exists, otherwise  .ocamlinit  in  the
              user's home directory.

       -labels
              Labels  are  not ignored in types, labels may be used in applications, and labelled
              parameters can be given in any order.  This is the default.

       -no-app-funct
              Deactivates the applicative behaviour of functors. With this option,  each  functor
              application  generates  new types in its result and applying the same functor twice
              to the same argument yields two incompatible structures.

       -noassert
              Do not compile assertion checks.  Note that the special form assert false is always
              compiled because it is typed specially.

       -nolabels
              Ignore  non-optional  labels  in  types. Labels cannot be used in applications, and
              parameter order becomes strict.

       -noprompt
              Do not display any prompt when waiting for input.

       -nopromptcont
              Do not display the secondary prompt when waiting for continuation lines  in  multi-
              line inputs.  This should be used e.g. when running ocaml(1) in an emacs(1) window.

       -nostdlib
              Do  not  include the standard library directory in the list of directories searched
              for source and compiled files.

       -ppx command
              After parsing, pipe the abstract syntax tree through the preprocessor command.  The
              format of the input and output of the preprocessor are not yet documented.

       -principal
              Check  information  path  during  type-checking,  to  make  sure that all types are
              derived in a principal way.   When  using  labelled  arguments  and/or  polymorphic
              methods,  this  flag  is required to ensure future versions of the compiler will be
              able to infer types correctly, even if internal algorithms  change.   All  programs
              accepted  in  -principal mode are also accepted in the default mode with equivalent
              types, but different binary signatures, and this may slow down type  checking;  yet
              it is a good idea to use it once before publishing source code.

       -rectypes
              Allow  arbitrary  recursive types during type-checking.  By default, only recursive
              types where the recursion goes through an object type are supported.

       -short-paths
              When a type is visible under  several  module-paths,  use  the  shortest  one  when
              printing the type's name in inferred interfaces and error and warning messages.

       -stdin Read  the  standard  input  as  a  script  file rather than starting an interactive
              session.

       -strict-sequence
              Force the left-hand part of each sequence to have type unit.

       -unsafe
              Turn  bound  checking  off  on  array  and  string  accesses   (the   v.(i)ands.[i]
              constructs).  Programs  compiled  with  -unsafe  are therefore slightly faster, but
              unsafe: anything can happen if the program accesses an array or string  outside  of
              its bounds.

       -version
              Print version string and exit.

       -vnum  Print short version number and exit.

       -w warning-list
              Enable  or  disable warnings according to the argument warning-list.  See ocamlc(1)
              for the syntax of the warning-list argument.

       -warn-error warning-list
              Mark as fatal the warnings described by the argument  warning-list.   Note  that  a
              warning  is  not triggered (and does not trigger an error) if it is disabled by the
              -w option.  See ocamlc(1) for the syntax of the warning-list argument.

       -warn-help
              Show the description of all available warning numbers.

       - file Use file as a script file name, even when it starts with a hyphen (-).

       -help or --help
              Display a short usage summary and exit.

ENVIRONMENT VARIABLES

       LC_CTYPE
              If set to iso_8859_1, accented characters (from the ISO Latin-1 character  set)  in
              string  and  character  literals  are printed as is; otherwise, they are printed as
              decimal escape sequences.

       TERM   When printing error messages, the toplevel system attempts  to  underline  visually
              the  location of the error. It consults the TERM variable to determines the type of
              output terminal and look up its capabilities in the terminal database.

SEE ALSO

       ocamlc(1), ocamlopt(1), ocamlrun(1).
       The OCaml user's manual, chapter "The toplevel system".

                                                                                         OCAML(1)