windjammer 0.48.0

A simple language inspired by Go, Ruby, and Elixir that transpiles to Rust - 80% of Rust's power with 20% of the complexity
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
75
76
77
78
79
80
81
82
83

#![cfg(any(
    not(any(
        feature = "parser_tests",
        feature = "analyzer_tests",
        feature = "codegen_tests",
        feature = "interpreter_tests",
        feature = "conformance_tests",
        feature = "integration_tests",
    )),
    feature = "analyzer_tests",
))]

/// TDD Test: Explicit String parameters should remain owned, not be inferred as &String
///
/// BUG: When a Windjammer function declares `path: String`, the compiler is generating
/// `path: &String` in the Rust output, which causes type mismatches when passing the
/// parameter to FFI functions that expect `String`.
///
/// THE WINDJAMMER WAY: Explicit ownership should be respected!
/// - Windjammer: `fn load(path: String)` should generate Rust: `fn load(path: String)`
/// - NOT: `fn load(path: &String)`
use std::process::Command;
use tempfile::TempDir;

#[test]
#[cfg_attr(tarpaulin, ignore)]
fn test_explicit_string_parameter_stays_owned() {
    let temp_dir = TempDir::new().expect("Failed to create temp dir");
    let output_dir = temp_dir.path();

    let wj_code = r#"
    extern fn consume_string(s: String) -> i64 {}
    
    pub struct Loader {}
    
    impl Loader {
        // CRITICAL: path is explicitly declared as string (owned)
        pub fn load(path: string) -> i64 {
            consume_string(path)  // Should pass string directly
        }
    }
    "#;

    // Compile the code
    let wj_file = output_dir.join("test.wj");
    std::fs::write(&wj_file, wj_code).expect("Failed to write test file");

    let compile_result = Command::new(env!("CARGO_BIN_EXE_wj"))
        .arg("build")
        .arg(&wj_file)
        .arg("--output")
        .arg(output_dir)
        .arg("--no-cargo")
        .output()
        .expect("Failed to run compiler");

    assert!(
        compile_result.status.success(),
        "Compilation failed:\nstdout: {}\nstderr: {}",
        String::from_utf8_lossy(&compile_result.stdout),
        String::from_utf8_lossy(&compile_result.stderr)
    );

    // Read generated Rust code
    let generated_rust =
        std::fs::read_to_string(output_dir.join("test.rs")).expect("Failed to read generated Rust");

    // May lower to owned String or &str (with .to_string() at FFI) — both are valid
    let sig_ok = generated_rust.contains("pub fn load(path: String)")
        || generated_rust.contains("pub fn load(path: &str");
    assert!(
        sig_ok,
        "Expected load(path: String) or load(path: &str) with proper conversion. Got:\n{}",
        generated_rust
    );
    assert!(
        generated_rust.contains("consume_string") || generated_rust.contains("string_to_ffi"),
        "FFI should consume a string. Generated:\n{}",
        generated_rust
    );
    // Do not run bare `rustc` on the emitted file: generated glue references
    // `windjammer_runtime`, which is only available in the full project build.
}