| 1 | |
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| 2 | :- protocol(characterp). |
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| 3 | |
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| 4 | :- info([ |
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| 5 | version is 1.0, |
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| 6 | author is 'Paulo Moura', |
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| 7 | date is 2000/7/24, |
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| 8 | comment is 'Character protocol.']). |
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| 9 | |
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| 10 | :- public(is_alphanumeric/1). |
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| 11 | :- mode(is_alphanumeric(+char), zero_or_one). |
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| 12 | :- info(is_alphanumeric/1, [ |
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| 13 | comment is 'True if the argument is an alphanumeric character.', |
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| 14 | argnames is ['Term']]). |
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| 15 | |
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| 16 | :- public(is_alpha/1). |
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| 17 | :- mode(is_alpha(+char), zero_or_one). |
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| 18 | :- info(is_alpha/1, [ |
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| 19 | comment is 'True if the argument is a letter or an underscore.', |
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| 20 | argnames is ['Term']]). |
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| 21 | |
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| 22 | :- public(is_letter/1). |
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| 23 | :- mode(is_letter(+char), zero_or_one). |
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| 24 | :- info(is_letter/1, [ |
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| 25 | comment is 'True if the argument is a letter.', |
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| 26 | argnames is ['Term']]). |
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| 27 | |
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| 28 | :- public(is_bin_digit/1). |
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| 29 | :- mode(is_bin_digit(+char), zero_or_one). |
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| 30 | :- info(is_bin_digit/1, [ |
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| 31 | comment is 'True if the argument is a binary digit.', |
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| 32 | argnames is ['Term']]). |
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| 33 | |
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| 34 | :- public(is_octal_digit/1). |
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| 35 | :- mode(is_octal_digit(+char), zero_or_one). |
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| 36 | :- info(is_octal_digit/1, [ |
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| 37 | comment is 'True if the argument is an octal digit.', |
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| 38 | argnames is ['Term']]). |
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| 39 | |
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| 40 | :- public(is_dec_digit/1). |
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| 41 | :- mode(is_dec_digit(+char), zero_or_one). |
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| 42 | :- info(is_dec_digit/1, [ |
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| 43 | comment is 'True if the argument is a decimal digit.', |
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| 44 | argnames is ['Term']]). |
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| 45 | |
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| 46 | :- public(is_hex_digit/1). |
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| 47 | :- mode(is_hex_digit(+char), zero_or_one). |
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| 48 | :- info(is_hex_digit/1, [ |
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| 49 | comment is 'True if the argument is an hexadecimal digit.', |
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| 50 | argnames is ['Term']]). |
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| 51 | |
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| 52 | :- public(is_lower_case/1). |
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| 53 | :- mode(is_lower_case(+char), zero_or_one). |
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| 54 | :- info(is_lower_case/1, [ |
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| 55 | comment is 'True if the argument is a lower case letter.', |
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| 56 | argnames is ['Term']]). |
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| 57 | |
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| 58 | :- public(is_upper_case/1). |
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| 59 | :- mode(is_upper_case(+char), zero_or_one). |
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| 60 | :- info(is_upper_case/1, [ |
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| 61 | comment is 'True if the argument is a upper case letter.', |
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| 62 | argnames is ['Term']]). |
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| 63 | |
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| 64 | :- public(is_vowel/1). |
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| 65 | :- mode(is_vowel(+char), zero_or_one). |
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| 66 | :- info(is_vowel/1, [ |
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| 67 | comment is 'True if the argument is a vowel.', |
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| 68 | argnames is ['Term']]). |
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| 69 | |
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| 70 | :- public(is_layout/1). |
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| 71 | :- mode(is_layout(+char), zero_or_one). |
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| 72 | :- info(is_layout/1, [ |
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| 73 | comment is 'True if the argument is a layout character.', |
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| 74 | argnames is ['Term']]). |
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| 75 | |
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| 76 | :- public(lower_upper/2). |
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| 77 | :- mode(lower_upper(?char, ?char), zero_or_more). |
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| 78 | :- mode(lower_upper(+char, ?char), zero_or_one). |
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| 79 | :- mode(lower_upper(?char, +char), zero_or_one). |
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| 80 | :- info(lower_upper/2, [ |
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| 81 | comment is 'Converts between lower and upper case letters.', |
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| 82 | argnames is ['Term1', 'Term2']]). |
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| 83 | |
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| 84 | :- end_protocol. |
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