Escape Sequences

Escape sequences allow Rant to print characters that are reserved by the language or unable to be easily typed.

An escape sequence is constructed with a backwards slash (\) followed by one character (or more than one, in the case of \u or with a quantifier added).

Any character can be escaped. This includes brackets \{ \[ \<, slashes \\ \/, quotes \" \', number signs \# and everything else.

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Types[link]

There are two types of escape sequence characters:

Static escape sequences[link]

Static escape sequences always print the same value.

Escape sequence Description Unicode character code
\n Line feed 0x000a
\r Carriage return 0x000d
\v Vertical tab 0x000b
\b Backspace 0x0008
\f Form feed 0x000c
\s Space 0x0020
\t Horizontal tab 0x0009
\uxxxx Unicode character \u0052\u0041\u004e\u0054 = "RANT"
\Uxxxxxxxx Surrogate pair \U0001f602 = 😂

Dynamic escape sequences[link]

Dynamic escape sequences either print a random selection from a list of characters, or print certain context-sensitive strings (\a and \N).

Escape sequence Description
\a English indefinite article
\c Lowercase letter
\C Uppercase letter
\d Digit
\D Nonzero digit
\N System-specific line separator
\x Lowercase hexadecimal digit
\X Uppercase hexadecimal digit
\w Lowercase alphanumeric character
\W Uppercase alphanumeric character

Quantifiers[link]

Escape sequences can print more than one character using a quantifier. A quantifier is added by inserting a positive, nonzero integer after the backward slash, separated from the escape character by a comma.

The number specifies how many times to repeat the character. If the escape character is dynamic, each repetition will be randomized.

\16,X   # 16-character uppercase hexadecimal number
\32,c   # 32 random lowercase letters
\100,n  # 100 line feeds

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