harn-vm 0.7.17

Async bytecode virtual machine for the Harn programming language
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74

use super::*;
use crate::chunk::{Chunk, Constant};
use harn_lexer::Lexer;
use harn_parser::Parser;

fn compile_source(source: &str) -> Chunk {
    let mut lexer = Lexer::new(source);
    let tokens = lexer.tokenize().unwrap();
    let mut parser = Parser::new(tokens);
    let program = parser.parse().unwrap();
    Compiler::new().compile(&program).unwrap()
}

#[test]
fn test_compile_arithmetic() {
    let chunk = compile_source("pipeline test(task) { let x = 2 + 3 }");
    assert!(!chunk.code.is_empty());
    assert!(chunk.constants.contains(&Constant::Int(2)));
    assert!(chunk.constants.contains(&Constant::Int(3)));
}

#[test]
fn test_compile_function_call() {
    let chunk = compile_source("pipeline test(task) { log(42) }");
    let disasm = chunk.disassemble("test");
    assert!(disasm.contains("CALL"));
}

#[test]
fn test_compile_if_else() {
    let chunk =
        compile_source(r#"pipeline test(task) { if true { log("yes") } else { log("no") } }"#);
    let disasm = chunk.disassemble("test");
    assert!(disasm.contains("JUMP_IF_FALSE"));
    assert!(disasm.contains("JUMP"));
}

#[test]
fn test_compile_while() {
    let chunk = compile_source("pipeline test(task) { var i = 0\n while i < 5 { i = i + 1 } }");
    let disasm = chunk.disassemble("test");
    assert!(disasm.contains("JUMP_IF_FALSE"));
    assert!(disasm.contains("JUMP"));
}

#[test]
fn test_compile_closure() {
    let chunk = compile_source("pipeline test(task) { let f = { x -> x * 2 } }");
    assert!(!chunk.functions.is_empty());
    assert_eq!(chunk.functions[0].params, vec!["x"]);
}

#[test]
fn test_compile_list() {
    let chunk = compile_source("pipeline test(task) { let a = [1, 2, 3] }");
    let disasm = chunk.disassemble("test");
    assert!(disasm.contains("BUILD_LIST"));
}

#[test]
fn test_compile_dict() {
    let chunk = compile_source(r#"pipeline test(task) { let d = {name: "test"} }"#);
    let disasm = chunk.disassemble("test");
    assert!(disasm.contains("BUILD_DICT"));
}

#[test]
fn test_disassemble() {
    let chunk = compile_source("pipeline test(task) { log(2 + 3) }");
    let disasm = chunk.disassemble("test");
    assert!(disasm.contains("CONSTANT"));
    assert!(disasm.contains("ADD"));
    assert!(disasm.contains("CALL"));
}