protocol

characterp

Character protocol.

Availability:

logtalk_load(types(loader))

Author: Paulo Moura

Version: 1:3:0

Date: 2019-06-29

Compilation flags:

static

Dependencies:

(none)

Remarks:

(none)

Inherited public predicates:

(none)

Public predicates

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_punctuation/1

True if the argument is a sentence punctuation character.

Compilation flags:

static

Template:

is_punctuation(Char)

Mode and number of proofs:

is_punctuation(+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

Recognizes 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

Recognizes 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 predicates

(none)

Private predicates

(none)

Operators

(none)

See also

character