SLang

Simple language inspired by scheme

Example

file.sl:

[println "Hello World"]

cli:

> slang file.sl
Hello World

Features

• Runing builtin functions
• Comments

TODO

• add runtime errors
• add basic aritmetic functions (+, -, *, /, %)
• add lazy evaluation
• add if function
• ability to set variables
• ability to create functions
• add do function
• local set
• ability to create structures
• pointers
• ability to create function signatures
• ability to import another file
• llvm based compiler

Builtin functions

• print prints its arguments to the screen
• println prints its arguments to the screen and appends newline
• + sums variable number of arguments of type bool, int or float
• - negates single argument or subtracts second argument from the first (works with bool, int and float)
• * multiplies variable number of arguments of type bool, int or float
• / divides the first argument by the second argument (works with int and float)
• % performs a modulo with two int arguments

Escape sequences

(in string and char literals)

• \0 null character
• \n newline
• \r carrige return
• \t tab
• \x hex char
  • there is no length limit
  • \xhello followed by no hex character is same as hello
  • \x68656c6c6f is same as hello
  • sequence can by optionally ended with ;
  • \x68656c6c;6f is same as hell6f
• any other character directly following \ is interpreted literally
  • it is not recommended to use this for other characters than\', \" and \\ (new escape sequences may be added later)

Comments

• use // for line comments
• use /* */ for block comments (/*/ is valid block comment)