Files
mercury/tests/warnings/format_call_warning.m
2023-09-16 12:14:42 +10:00

101 lines
3.5 KiB
Mathematica

%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
:- module format_call_warning.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
%---------------------------------------------------------------------------%
%---------------------------------------------------------------------------%
:- implementation.
:- import_module format_call_warning_helper_1.
:- import_module int.
:- import_module list.
:- import_module string.
main(!IO) :-
CurLevel = 6,
Msg = "The record temperature is",
TempA = 42.3,
TempB = 43.2,
% This call should get warnings for all four fs/vl pairs.
maybe_log_msg(CurLevel, 1,
"%%s: 5.2f", [f(TempA)], [f(TempB)],
"%5.2f", [s(Msg), f(TempA)], [s(Msg), f(TempB)], !IO),
% This call should get a warning for only the second fs/vl pair.
maybe_log_msg(CurLevel, 1,
"%5.2f", [f(TempA)], [f(TempB), s(Msg)],
"%s: %5.2f", [s(Msg), f(TempA)], [s(Msg), f(TempB)], !IO),
% This call should not get any warnings.
maybe_log_msg(CurLevel, 1,
"%5.2f", [f(TempA)], [f(TempB)],
"%s: %5.2f", [s(Msg), f(TempA)], [s(Msg), f(TempB)], !IO),
% This call should get a warning.
maybe_log_simple_msg(CurLevel, 1, "%s: %5.2f", [s(Msg), s(Msg)], !IO),
% This call should get a warning.
maybe_log_imported_msg(CurLevel, 1, "%s: %5.2f",
[f(TempA), f(TempB)], !IO).
%---------------------------------------------------------------------------%
:- pred maybe_log_msg(int::in, int::in,
string::in, list(poly_type)::in, list(poly_type)::in,
string::in, list(poly_type)::in, list(poly_type)::in,
io::di, io::uo) is det.
:- pragma format_call(pred(maybe_log_msg/10),
[format_string_values(3, 4), format_string_values(3, 5),
format_string_values(6, 7), format_string_values(6, 8)]).
maybe_log_msg(CurLogLevel, MsgLevel,
FormatStrA, ValuesListA1, ValuesListA2,
FormatStrB, ValuesListB1, ValuesListB2, !IO) :-
Diff = MsgLevel - CurLogLevel,
% The first four calls to io.format below use <format string/values list>
% pairs that are listed in the format_call pragma. This means that
% callers of maybe_log_msg should have checked their compatibility,
% which means that we *don't* want to warn about being unable to check
% their compatibility *here*.
( if Diff >= 15 then
io.format(FormatStrA, ValuesListA1, !IO)
else if Diff >= 10 then
io.format(FormatStrA, ValuesListA2, !IO)
else if Diff >= 5 then
io.format(FormatStrB, ValuesListB1, !IO)
else if Diff >= 0 then
io.format(FormatStrB, ValuesListB2, !IO)
else
% While ValuesListB2 is listed in the format_call pragma, the
% format string does not come from there. Therefore the compiler
% *should* generate a warning about being unable to check this call
% due to having no idea about the value of ValuesListB2.
io.format("%d", ValuesListB2, !IO)
).
:- pred maybe_log_simple_msg(int::in, int::in,
string::in, list(poly_type)::in, io::di, io::uo) is det.
:- pragma format_call(pred(maybe_log_simple_msg/6),
format_string_values(3, 4)).
maybe_log_simple_msg(CurLogLevel, MsgLevel,
FormatStr, ValuesList, !IO) :-
Diff = MsgLevel - CurLogLevel,
( if Diff >= 0 then
io.format(FormatStr, ValuesList, !IO)
else
true
).
%---------------------------------------------------------------------------%