protocol

characterp

Character protocol.

Author: Paulo Moura
Version: 1.2
Date: 2011/2/19
Compilation flags:
static

(no dependencies on other entities)

Public interface

is_ascii/1

True if the argument is an ASCII character.

Compilation flags:
static
Template:
is_ascii(Char)
Mode and number of proofs:
is_ascii(+char) - zero_or_one

is_alphanumeric/1

True if the argument is an alphanumeric character.

Compilation flags:
static
Template:
is_alphanumeric(Char)
Mode and number of proofs:
is_alphanumeric(+char) - zero_or_one

is_alpha/1

True if the argument is a letter or an underscore.

Compilation flags:
static
Template:
is_alpha(Char)
Mode and number of proofs:
is_alpha(+char) - zero_or_one

is_letter/1

True if the argument is a letter.

Compilation flags:
static
Template:
is_letter(Char)
Mode and number of proofs:
is_letter(+char) - zero_or_one

is_bin_digit/1

True if the argument is a binary digit.

Compilation flags:
static
Template:
is_bin_digit(Char)
Mode and number of proofs:
is_bin_digit(+char) - zero_or_one

is_octal_digit/1

True if the argument is an octal digit.

Compilation flags:
static
Template:
is_octal_digit(Char)
Mode and number of proofs:
is_octal_digit(+char) - zero_or_one

is_dec_digit/1

True if the argument is a decimal digit.

Compilation flags:
static
Template:
is_dec_digit(Char)
Mode and number of proofs:
is_dec_digit(+char) - zero_or_one

is_hex_digit/1

True if the argument is an hexadecimal digit.

Compilation flags:
static
Template:
is_hex_digit(Char)
Mode and number of proofs:
is_hex_digit(+char) - zero_or_one

is_lower_case/1

True if the argument is a lower case letter.

Compilation flags:
static
Template:
is_lower_case(Char)
Mode and number of proofs:
is_lower_case(+char) - zero_or_one

is_upper_case/1

True if the argument is a upper case letter.

Compilation flags:
static
Template:
is_upper_case(Char)
Mode and number of proofs:
is_upper_case(+char) - zero_or_one

is_vowel/1

True if the argument is a vowel.

Compilation flags:
static
Template:
is_vowel(Char)
Mode and number of proofs:
is_vowel(+char) - zero_or_one

is_white_space/1

True if the argument is a white space character (a space or a tab) inside a line of characters.

Compilation flags:
static
Template:
is_white_space(Char)
Mode and number of proofs:
is_white_space(+char) - zero_or_one

is_layout/1

True if the argument is a layout character.

Compilation flags:
static
Template:
is_layout(Char)
Mode and number of proofs:
is_layout(+char) - zero_or_one

is_quote/1

True if the argument is a quote character.

Compilation flags:
static
Template:
is_quote(Char)
Mode and number of proofs:
is_quote(+char) - zero_or_one

is_punctation/1

True if the argument is a sentence punctation character.

Compilation flags:
static
Template:
is_punctation(Char)
Mode and number of proofs:
is_punctation(+char) - zero_or_one

is_period/1

True if the argument is a character that ends a sentence.

Compilation flags:
static
Template:
is_period(Char)
Mode and number of proofs:
is_period(+char) - zero_or_one

is_control/1

True if the argument is an ASCII control character.

Compilation flags:
static
Template:
is_control(Char)
Mode and number of proofs:
is_control(+char) - zero_or_one

is_newline/1

True if the argument is the ASCII newline character.

Compilation flags:
static
Template:
is_newline(Char)
Mode and number of proofs:
is_newline(+char) - zero_or_one

is_end_of_line/1

True if the argument is the ASCII end-of-line character (either a carriage return or a line feed).

Compilation flags:
static
Template:
is_end_of_line(Char)
Mode and number of proofs:
is_end_of_line(+char) - zero_or_one

parenthesis/2

Recognises and converts between open and close parenthesis.

Compilation flags:
static
Template:
parenthesis(Char1,Char2)
Mode and number of proofs:
parenthesis(?char,?char) - zero_or_more
parenthesis(+char,?char) - zero_or_one
parenthesis(?char,+char) - zero_or_one

lower_upper/2

Recognises and converts between lower and upper case letters.

Compilation flags:
static
Template:
lower_upper(Char1,Char2)
Mode and number of proofs:
lower_upper(?char,?char) - zero_or_more
lower_upper(+char,?char) - zero_or_one
lower_upper(?char,+char) - zero_or_one

Protected interface

(none)

Private predicates

(none)

Operators

(none)

Remarks

(none)

See also

character