kLang

---

kerboscript was once the only language for kOS. Then, with kRISC came .ksm. Now its time to make .ksm a compile target with kLang.

This goal of this project is to replace kerboscript with an actual (somewhat) modern programming language, while adhering to a subset of kRISC to be able to make it an actual REDUCED Instruct Set Computer.

Syntax

Here is some mock kLang code:

const ZERO: i32 = 0i32;

type MY_STRUCT: struct {
    name: str,
    index: i32
};

func main: (vessel: Vessel /* Vessel holds vessel data */) -> () {
    let mut hi_text: str = "hi kerbin?";
    hi_text = "Hello kOS!";
    if ?hi_text { // Not worth printing if its empty
        print(hi_text);
    }
}

Keywords

• func: specifies a function or function signature
• let: specifies an immutable variable
• const: specifies a compile time constant, only allowed in global scope
• macro: specifies a compile time macro (code replacement), only allowed in global scope
• mut: marks a variable or refrence as mutable
• return: returns from a function
• if: if-statement
• else: else-statement
• switch: switch-statement

Type Keywords

• i16
• i32
• f32
• f64
• bool
• byte
• str
• struct
• enum

Reserved Keywords

These are reserved, there is currently no plan to implement them

• async
• import

Unary Prefix Operators

• ?: Logical Operator, Evaluates "truthness" of another type (uses kOS's OpcodeLogicToBool in src/kOS.Safe/Compilation/Opcode.cs)
• &: Refrence
• *: Derefrence
• !: Logical Not
• -: Arithmetic Negation

Binary Infix Operators

• +: Addition
• -: Subtraction
• *: Multiplication
• \: Division
• &&: Boolean And
• ||: Boolean Or
• ==: Equality
• !=: Inequality
• >: Greater than
• <: Less than
• >=: Greater than or equals
• <=: Less than or equals

Number Literals

Integer and byte literals may begin with 0x to indicate hexadecimal parsing

String Literals

String literals must be surrounded with " characters

String Escape Sequences

• \n: Newline
• \t: Tab
• \r: Carriage Return
• \0: Nullbyte
• \3: Hex 0x03, to print ksm argument headers
• \\: \ character
• \": " character