How can I load a ml file in toplevel of OCaml, just like `use mine.sml` in SML/NJ?

Question

In SML's repl, you can just type use whatever.sml and load all things inside that .sml into repl.

How can I do that in OCaml?

Solution

You have #use directive for that purpose:

#use "file-name";;

Read, compile and execute source phrases from the given file. This is textual inclusion: phrases are processed just as if they were typed on standard input. The reading of the file stops at the first error encountered.

For example (as per @gasche's suggestion):

# #use "whatever.ml";;

Here is a complete list of OCaml directives.

Comments

[Alexander Mills]

fml, why are there so many REPL questions? I want to load an .ml file from another in an actual program not the f'ing REPL lol. I don't understand why people even use a REPL...please educate me.

[gasche]

Note that the # of #use must really be typed by the user as an additional character, this is not a reference to the beginning prompt. The whole line will therefore look like # #use "file.ml";;. Users are frequently confused about this.

[pad]

@gasche: Thanks, I added your example for clarification.