mirror of
https://github.com/Mercury-Language/mercury.git
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129 lines
3.8 KiB
Mathematica
129 lines
3.8 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module string_set_char.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is det.
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%---------------------------------------------------------------------------%
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module char.
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:- import_module require.
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:- import_module string.
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%---------------------------------------------------------------------------%
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main(!IO) :-
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( if string.set_char('x', -1, "", _) then
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error("test failed")
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else
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true
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),
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( if string.set_char('x', 0, "", _) then
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error("test failed")
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else
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true
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),
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( if string.set_char('x', 1, "", _) then
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error("test failed")
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else
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true
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),
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( if string.set_char('m', 0, "cat", "mat") then
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true
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else
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error("test failed")
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),
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( if string.set_char('u', 1, "cat", "cut") then
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true
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else
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error("test failed")
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),
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( if string.set_char('b', 2, "cat", "cab") then
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true
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else
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error("test failed")
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),
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( if string.set_char('x', 3, "cat", _) then
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error("test failed")
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else
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true
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),
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% Test variable-width characters.
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% In UTF-8:
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% y 1 code unit
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% ý 2 code units
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% ẏ 3 code units
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% U+10000 4 code units
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( if
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set_char_by_cp(".aßξ啕𐀀.", 1, 'y', ".yßξ啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 1, 'ý', ".ýßξ啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 1, 'ẏ', ".ẏßξ啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 1, '𐀀', ".𐀀ßξ啕𐀀.")
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then
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true
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else
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io.write_string("variable-width set_char failed (1)\n", !IO)
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),
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( if
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set_char_by_cp(".aßξ啕𐀀.", 2, 'y', ".ayξ啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 2, 'ý', ".aýξ啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 2, 'ẏ', ".aẏξ啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 2, '𐀀', ".a𐀀ξ啕𐀀.")
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then
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true
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else
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io.write_string("variable-width set_char failed (2)\n", !IO)
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),
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( if
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set_char_by_cp(".aßξ啕𐀀.", 3, 'y', ".aßy啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 3, 'ý', ".aßý啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 3, 'ẏ', ".aßẏ啕𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 3, '𐀀', ".aß𐀀啕𐀀.")
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then
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true
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else
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io.write_string("variable-width set_char failed (3)\n", !IO)
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),
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( if
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set_char_by_cp(".aßξ啕𐀀.", 4, 'y', ".aßξy𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 4, 'ý', ".aßξý𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 4, 'ẏ', ".aßξẏ𐀀."),
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set_char_by_cp(".aßξ啕𐀀.", 4, '𐀀', ".aßξ𐀀𐀀.")
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then
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true
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else
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io.write_string("variable-width set_char failed (4)\n", !IO)
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),
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( if
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set_char_by_cp(".aßξ啕𐀀.", 5, 'y', ".aßξ啕y."),
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set_char_by_cp(".aßξ啕𐀀.", 5, 'ý', ".aßξ啕ý."),
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set_char_by_cp(".aßξ啕𐀀.", 5, 'ẏ', ".aßξ啕ẏ."),
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set_char_by_cp(".aßξ啕𐀀.", 5, '𐀀', ".aßξ啕𐀀.")
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then
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true
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else
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io.write_string("variable-width set_char failed (5)\n", !IO)
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),
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io.write_string("test finished\n", !IO).
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:- pred set_char_by_cp(string::in, int::in, char::in, string::out) is semidet.
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set_char_by_cp(Str0, CodePoint, Char, Str) :-
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string.codepoint_offset(Str0, CodePoint, Offset),
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string.set_char(Char, Offset, Str0, Str),
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trace [io(!IO), runtime(env("DEBUG"))] (
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io.write_string(Str, !IO),
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nl(!IO)
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).
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