s-lang-mta 0.1.4

S lang interpreter

s-lang

s-lang interpreter

Basic usage:

from s_lang import run


def main() -> None:
    inputs = [5]
    code = """
    Z <- Z + 1
[A] IF X != 0 GOTO B
    IF Z != 0 GOTO E
[B] Y <- Y + 1
    X <- X - 1
    IF Z != 0 GOTO A
"""

    result: int = run(code, inputs)
    print(result) 


if __name__ == "__main__":
    main()

Notes:

• The interpreter is sensitive to both white space and letter case.
• Variable names must be an upper-case X, Z or Y. X or Z vars may or may not have an adjacent positive index (X1, X2, Z10)
• Labels must be an upper-case letter and may or may not have an adjacent positive index (L, A1, B5)
• A variable or label which are not indexed will be indexed by 1 as default

Instruction with tags:

[L] {...}

Supported commands:

V <- V	V: VAR	assign V to itself
V <- V + 1	V: VAR	increase V by 1
V <- V - 1	V: VAR	decrease V by 1
IF V != 0 GOTO L	V: VAR, L:LABEL	if V is not eq to 0 jump to the instruction tagged with L, else continue to the next instruction
V <- V + k	V: VAR, k: CONST	increase V by k
V <- V - k	V: VAR, k: CONST	decrease V by k
IF V = 0 GOTO L	V: VAR, L: LABEL	if V is eq to 0 jump to the instruction tagged with L, else continue to the next instruction
GOTO L	L: LABEL	jump to the instruction tagged with L