D+

Contents:

Dependencies

Procedures

Variables

Keywords

Words

Strings

Lexing

Syntactical Analysis (SYNA)

Parsing......................................Not Implemented Yet

Code Generation (ASM)

Dependencies:

NASM, CBUILD (My C Build System) and a linker

Procedures:

Procedures are defined with the proc keyword and may not return any value. Procedures are the only thing that exists in this language. And every variable is global. There are no functions.

Variables:

Variables are put like so: NAME equ VALUE in NASM. So like #defines. I'll say it is functional and call it a day.

Keywords:

Keywords are the single words in a program like: proc or return. return does exist as a keyword, but it doesn't take any arguments like 0. Procedures should return with return, while the main procedure should return with exit(<code>).

Words:

Words are symbols like int or main.

Strings:

Strings have a length SL and a value SV with a number 0..2147483647 or 0 .. 2³²-1. That because the counter is not unsigned but starts with 0.

Lexing:

Lexing is where the code gets split up into tokens, a.k.a. where this:

proc main() {
    write("Hello world!");
}

becomes this:

[KEYWORD]: proc
[WORD]: main
[OPEN_PARENTHESIS]: 
[CLOSED_PARENTHESIS]: 
[OPEN_BRACE]: 
[WORD]: write
[OPEN_PARENTHESIS]: 
[STRING_LITERAL]: "Hello, World!"
[CLOSED_PARENTHESIS]: 
[SEMI_COLON]: 
[CLOSED_BRACE]: 

Code Generation (ASM):

; D+ ASSEMBLY GENERATED
section .text
  global _start

_start:
  ; WRITE
  mov rax, 1
  mov rdi, 1
  mov rsi, SV0
  mov rdx, SL0
  syscall


section .data
SV0: db "Hello, world!", 0xa
SL0 equ $ - SV0