1:- module(with_output, [with_output_to/3, with_output_to_pl/2]). 2 3:- use_module(library(docker/random_names)). 4 5:- meta_predicate 6 with_output_to( , , ), 7 with_output_to_pl( , ).
current_outputpointing at a file with UTF-8 encoding. In (+, -, :) mode, creates a randomly-generated file with random new name unified at Spec. With Spec unbound, generates a random one-time name. Does not try to back-track in order to create a unique random name. Hence overwrites any existing file.
This is an arity-three version of with_output_to/2; same name, different arity. Writes the results of running Goal to some file given by Spec and FileType. Fails if Spec and FileType fail to specify a writable file location.
When Spec unbound, generates a random name. Binds the name to Spec.
24with_output_to(FileType, Spec, Goal) :- 25 var(Spec), 26 !, 27 random_name_chk(Spec), 28 with_output_to(FileType, Spec, Goal). 29with_output_to(FileType, Spec, Goal) :- 30 absolute_file_name(Spec, File, [file_type(FileType), access(write)]), 31 setup_call_cleanup( 32 open(File, write, Out, [encoding(utf8)]), 33 with_output_to(Out, Goal), 34 close(Out)).
current_outputpointing at a randomly-generated Prolog source file with UTF-8 encoding. In (+, :) mode, creates a Prolog file with name given by Spec.
42with_output_to_pl(Spec, Goal) :- 43 with_output_to(prolog, Spec, Goal). 44 45:- multifile user:prolog_file_type/2. 46:- dynamic user:prolog_file_type/2. 47:- public user:prolog_file_type/2. 48 49userprolog_file_type(txt, text)