Files
mercury/tests/hard_coded/nullary_ho_func.m
Zoltan Somogyi 2bd7c5ee3e Rename X's aux modules as X_helper_N in hard_coded.
tests/hard_coded/*.m:
    Rename modules as mentioned above.

    In a few cases, where the main module's name itself had a suffix,
    such as "_mod_a" or "_main", remove that suffix. This entails
    renaming the .exp file as well. (In some cases, this meant that
    the name of a helper module was "taken over" by the main module
    of the test case.)

    Update all references to the moved modules.

    General updates to programming style, such as

    - replacing DCG notation with state var notation
    - replacing (C->T;E) with (if C then T else E)
    - moving pred/func declarations to just before their code
    - replacing io.write/io.nl sequences with io.write_line
    - replacing io.print/io.nl sequences with io.print_line
    - fixing too-long lines
    - fixing grammar errors in comments

tests/hard_coded/Mmakefile:
tests/hard_coded/Mercury.options:
    Update all references to the moved modules.

    Enable the constant_prop_int test case. The fact that it wasn't enabled
    before is probably an accident. (When constant_prop_int.m was created,
    the test case was added to a list in the Mmakefile, but that list
    was later removed due to never being referenced.)

tests/hard_coded/constant_prop_int.{m,exp}:
    Delete the calls to shift operations with negative shift amounts,
    since we have added a compile-time error for these since the test
    was originally created.
2023-06-16 08:33:22 +02:00

56 lines
1.7 KiB
Mathematica

%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
%
% Test case for use of zero-arity higher-order function terms.
%
% Author: fjh
:- module nullary_ho_func.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module std_util.
:- import_module type_desc.
:- type nullary_func(T) == ((func) = T).
:- inst nullary_func == ((func) = out is det).
:- func apply_nullary_func(nullary_func(T)) = T.
:- mode apply_nullary_func(in(nullary_func)) = out is det.
apply_nullary_func(F) = apply(F).
:- func apply_func((func) = T) = T.
:- mode apply_func((func) = out is semidet) = out is semidet.
:- mode apply_func((func) = out is det) = out is det.
apply_func(F) = apply(F).
main(!IO) :-
F = ((func) = 42),
X = apply(F),
G = ((func) = (_ :: out) is semidet :- fail),
H = ((func) = (R :: out) is semidet :- semidet_succeed, R = X),
io.print("X = ", !IO), io.print_line(X, !IO),
io.print("apply(F) = ", !IO), io.print_line(X, !IO),
io.print("apply_func(F) = ", !IO), io.print_line(X, !IO),
io.print("apply_nullary_func(F) = ", !IO), io.print_line(X, !IO),
( if Y = apply(G) then
io.print("Y = ", !IO), io.print_line(Y, !IO)
else
io.print_line("Y = apply(G) failed", !IO)
),
( if Z = apply(H) then
io.print("Z = ", !IO), io.print_line(Z, !IO)
else
io.print_line("Y = apply(G) failed", !IO)
),
print("type_of(F) = ", !IO),
print_line(type_of(F), !IO),
print("type_name(type_of(F)) = ", !IO),
print_line(type_name(type_of(F)), !IO).