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somebody1234 edited this page Oct 20, 2016 · 9 revisions

Getting started with Charcoal

Using Charcoal

There are many flags you can use to specify how you want to use Charcoal.

Types

Name Short form Succinct mode Verbose mode
Integer int A run of ⁰¹²³⁴⁵⁶⁷⁸⁹ A run of 0123456789
String str A run of ASCII printables ( to ~), or a compressed string (more about this later) A string delimited with " or ', processed with Unicode unescaping
Variable var One of αβγδεζηθικλμνξπρσςτυφχψω One of abgdezhciklmnxprstufko
Literal lit An int, str, or var An int, str, or var
Arrow arw One of ←↑→↓↖↗↘↙ One of :Left, :Right, :Up, :Down, :UpLeft, :UpRight, :DownLeft and :DownRight.
Command cmd See Command. See Command.
Operator op See Operator. See Operator.
Dyad dy A dyadic operator. A dyadic operator.
Monad mn A monadic operator. A monadic operator.
Nilad nl A niladic operator. A niladic operator.
Expression exp A lit, lst, dy exp exp, mn exp, or nl
Body bdy A command, or multiple commands surrounded by «» A command, or multiple commands surrounded by {}
List lst A list of lit, delimited by ⟦⟧
Arrow list als A list of arw, delimited by ⟦⟧
Separator sep ¦ One of ,;

Separators can be placed after any literal, i.e. an int, str, or var.

Compressed strings

Strings delimited by “” are compressed strings. This means they are ASCII strings converted from base 96 or under (the 95 printables and newline) to base 255 (the full 8-bit codepage minus ). The first character in the string is the encoded character for the base.

Strings delimited by ”” are permuted compressed strings. This means they are ASCII strings converted from base 96 or under to base 255. The first character in the string is the encoded index of the permutation number, the second is the encoded character for the base.

Permutation number

The default order of the ASCII character set is whitespace, symbols, lowercase letters, numbers, and uppercase letters. An index is generated based on the number of uses of each type of character using this order as the base.

Commands

Pretty simple. In succinct mode it's just <command><arguments : var>, in verbose mode it's just <command>(<arguments : var>). See more [here|Commands].

Control Flow

There are three kinds of control flow statements:

Succinct

¿<condition : exp><if_true : bdy><if_false : bdy>
F<iterable : exp><body : bdy>
W<condition : exp><body : bdy>
HF<delay : exp><iterable : exp><body : bdy>
HW<delay : exp><condition : exp><body : bdy>

Verbose

if (<condition : exp>) <if_true : bdy><if_false : bdy>
for (<iterable : exp>) <body : bdy>
while (<condition : exp>) <body : bdy> RefreshFor(<delay : exp><iterable : exp>_<body : bdy>
RefreshWhile(<delay : exp><condition : exp>)<body : bdy>

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