Table of Contents
- List of Tokens
- Newline
- Indent
- Separator
- Permission
- Return Direction
- Int
- UInt
- Float
- String
- Rune
- Name
- Colon
- Dot
- Elipsis
- Comma
- LBracket and RBracket
- LBrace and RBrace
- Plus and Minus
- Increment and Decrement
- Asterisk and Slash
- At
- Exclamation
- Percent
- Tilde
- Equal To
- Not Equal To
- Less Than and Greater Than
- Less Than Equal To and Greater Than Equal To
- Left Shift and Right Shift
- Binary Or and Logical Or
- Binary And and Logical And
Arf's syntax is composed of basic elements called tokens. They can be arranged to build higher level syntactical features.
Important: some characters in this documented may be affected by font ligatures, and do not reflect what the language actually accepts as valid. If it is not immediately apparent what a given character is, paste it into a text field that is not ligaturized.
List of Tokens
Newline
A simple line break.
Indent
A series of tabs characters. It's value should describe its indentation level.
Separator
A series of three dashes (---). It is used so separate a file's metadata from its body, and in functions.
Permission
Return Direction
A return direction arrow (->).
Int
A negative integer number. This says nothing about the actual intended type of the value, just the representation of it found in the source code.
UInt
An positive integer number. This says nothing about the actual intended type of the value, just the representation of it found in the source code.
Float
A floating point number.
String
A string literal delimited by double quotes. It supports these escape codes:
\a\b\f\n\r\t\v\'\"\\
Hexidecimal and unicode escape codes are also permitted:
\xNN\uNNNN\UNNNNNNNN
... where N is a single digit from 0-F.
String and rune literals support both \' and \".
Rune
A unicode character literal delimited by single quotes. Only one character value is supported. All escape codes that work in strings work in rune literals.
Name
Names are composed of characters a-z, A-Z, and 0-9. However, they must start with an alphabetical character. They do not support underscores.
Colon
A colon symbol. It is used in type notation.
Dot
A dot symbol. It is used in member selection and object initialization.
Elipsis
Two consecutive dots. It is used in type notation to describe an array with a variable length, and will in the future be used in functions with variable input counts.
Comma
This token is not used for anything as of now.
LBracket and RBracket
Left and right square brackets ([ and ]). These are used to delimit prases.
LBrace and RBrace
Left and right curly braces ({ and }). These are used for pointer dereferencing and array subscript notation, as well as in type notation to describe pointers and arrays.
Plus and Minus
Plus and minus symbols (+ and -). These are used to add and subtract values.
Increment and Decrement
The plus and minus symbols respectively, but each repeated once (++ and --). These are used to increment and decrement values.
Asterisk and Slash
Multiplication and division symbols (* and /). These are used to multiply and divide values.
At
An @ symbol. This is used to define method recievers in function/method sections.
Exclamation
An exclamation point. This is used as a logical not. In the future may be used to notate exception handling in functions.
Percent
A percent sign. This is used for modulo operations.
Tilde
A tilde (~) symbol. This is used as a binary not.
Equal To
An equals symbol (=). This is used to check equality, and not to set values. set phrases are used for that purpose.
Not Equal To
A not equals symbol (!=). This is used to check inequality.
Less Than and Greater Than
Less than and greater than symbols (< and >). These are used to compare numbers, and denote inputs and outputs in function/method sections.
Less Than Equal To and Greater Than Equal To
Like the less than and greater than tokens, except each followed by an equals symbol (<= and >=). These are used to compare numbers.
Left Shift and Right Shift
The less than and greater than sumbols respectively, but each repeated once (<< and >>). These are used to perform left and right bit shift options on values.
Binary Or and Logical Or
A binary or is a single pipe symbol (|). A logical or is a double pipe symbol (||).
Binary And and Logical And
A binary and is a single amperseand symbol (&&). A logical or is a double amperseand symbol (&&).