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

#[path = "common/test_utils.rs"]
mod test_utils;

use std::fs;
use std::process::Command;
use tempfile::TempDir;

/// Test that string literals are automatically converted to String in function calls
///
/// Bug: Passing "literal" to fn(String) requires .to_string(), but shouldn't
/// Fix: Compiler should auto-convert &str literals to String when needed
#[test]
#[cfg_attr(tarpaulin, ignore)]
fn test_string_literal_to_string_in_function_call() {
    let source = r#"
struct Item {
    pub id: string,
    pub name: string,
    pub description: string,
}

impl Item {
    pub fn new(id: string, name: string, description: string) -> Item {
        Item { id: id, name: name, description: description }
    }
}

fn main() {
    // Should auto-convert string literals to string
    let item = Item::new("sword", "Iron Sword", "A basic sword")
    assert_eq(item.id, "sword")
}
"#;

    let temp_dir = TempDir::new().unwrap();
    let input_path = temp_dir.path().join("test.wj");
    fs::write(&input_path, source).unwrap();

    let output = Command::new(test_utils::wj_binary())
        .args(["build", input_path.to_str().unwrap(), "--no-cargo"])
        .current_dir(&temp_dir)
        .output()
        .expect("Failed to run wj compiler");

    if !output.status.success() {
        panic!(
            "Windjammer compilation failed: {}",
            String::from_utf8_lossy(&output.stderr)
        );
    }

    let rust_path = temp_dir.path().join("build/test.rs");
    let rust_code = fs::read_to_string(&rust_path).unwrap();

    println!("Generated Rust:\n{}", rust_code);

    // Struct-literal-only string params use &str API — literals pass directly at call site.
    assert!(
        rust_code.contains(r#"Item::new("sword", "Iron Sword", "A basic sword")"#),
        "Expected string literals passed directly as &str (no call-site .to_string())"
    );
    assert!(
        !rust_code.contains(r#""sword".to_string(), "Iron Sword".to_string()"#),
        "Should not add .to_string() at call site for struct-literal-stored &str params"
    );
}

#[test]
#[cfg_attr(tarpaulin, ignore)]
fn test_string_literal_in_method_call() {
    let source = r#"
struct Manager {
    pub items: Vec<string>,
}

impl Manager {
    pub fn new() -> Manager {
        Manager { items: Vec::new() }
    }
    
    pub fn add(self, item: string) {
        self.items.push(item)
    }
}

fn main() {
    let mut mgr = Manager::new()
    mgr.add("test")  // Should auto-convert
}
"#;

    let temp_dir = TempDir::new().unwrap();
    let input_path = temp_dir.path().join("test.wj");
    fs::write(&input_path, source).unwrap();

    let output = Command::new(test_utils::wj_binary())
        .args(["build", input_path.to_str().unwrap(), "--no-cargo"])
        .current_dir(&temp_dir)
        .output()
        .expect("Failed to run wj compiler");

    if !output.status.success() {
        panic!(
            "Windjammer compilation failed: {}",
            String::from_utf8_lossy(&output.stderr)
        );
    }

    let rust_path = temp_dir.path().join("build/test.rs");
    let rust_code = fs::read_to_string(&rust_path).unwrap();

    // Verify .to_string() was added
    assert!(
        rust_code.contains(r#"mgr.add("test".to_string())"#),
        "Expected automatic .to_string() conversion in method call"
    );
}