C99 · token-based · wasm-ready

lo3

A minimalist interpreted language. Every command follows #CMD ARG1 ARG2 — always exactly two arguments, no exceptions.

// playground

output

lo3>

ctrl+enter

ln 1, col 1 0 chars

examples

// syntax reference

type prefixes

$42 ; integer _text ; string %name ; variable *0 ; global[0]

Every value carries a type prefix. Variables typed at creation: 0 = num, 3 = string.

variables

#n _x $0 ; new num var #n _s $3 ; new str var #= %x $99 ; assign #f %x $0 ; free

#n allocates, #f frees. Max 256 variables.

alu operations

#+ %x $5 ; x += 5 #- %x $2 ; x -= 2 #* %x $3 ; x *= 3 #/ %x $4 ; x /= 4

Mutate arg1 in-place. Arg2 must be an integer literal.

i/o & exit

#o %x $0 ; print var #o _hi $0 ; print literal #0 $0 $0 ; exit 0 #1 $0 $0 ; exit 1

Without explicit exit, runs to EOF and exits 0.

// implementation status

ALU Operations✓ done

Output / STDOUT✓ done

Input / STDIN✓ done

Variable system✓ done

Manual exit (0/1)✓ done

Auto exit (EOF)✓ done

WebAssembly build✓ done

Control Flow / jmp~ wip

Plugin / dlopen~ wip

Global array g[]~ wip

Double / float type· todo

Func calling· todo