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(not(any(
    feature = "parser_tests",
    feature = "analyzer_tests",
    feature = "codegen_tests",
    feature = "interpreter_tests",
    feature = "conformance_tests",
    feature = "integration_tests",
)))]

/// TDD Test: Nested Field Access Through Borrowed Iterator
///
/// Bug: Compiler fails to add & or .clone() for nested field access like stack.item.id
/// where stack is from &collection and parameter expects &String
///
/// Real-world case from windjammer-game/rpg/trading.wj:
/// ```windjammer
/// for stack in &self.merchant_offer {
///     if !merchant.has_item(stack.item.id, stack.quantity) {
///         return false
///     }
/// }
/// ```
use std::fs;
use std::process::Command;

#[test]
fn test_nested_field_to_borrowed_param() {
    let source = r#"
struct Item {
    id: string
}

struct Stack {
    item: Item
    quantity: i32
}

struct Merchant {
    stacks: Vec<Stack>
}

impl Merchant {
    fn has_item(item_id: string, quantity: i32) -> bool {
        true
    }
    
    fn check_offer(offers: Vec<Stack>) -> bool {
        for stack in &offers {
            if !has_item(stack.item.id, stack.quantity) {
                return false
            }
        }
        true
    }
}

fn main() {}
"#;

    let _tmp = tempfile::tempdir().unwrap();

    let temp_dir = _tmp.path();

    let test_id = format!(
        "wj_test_{}",
        std::time::SystemTime::now()
            .duration_since(std::time::UNIX_EPOCH)
            .unwrap()
            .as_nanos()
    );
    let test_dir = temp_dir.join(&test_id);
    fs::create_dir_all(&test_dir).unwrap();

    let wj_file = test_dir.join("test.wj");
    fs::write(&wj_file, source).unwrap();

    let out_dir = test_dir.join("out");

    let wj_binary = env!("CARGO_BIN_EXE_wj");
    let _output = Command::new(wj_binary)
        .arg("build")
        .arg("--no-cargo")
        .arg(&wj_file)
        .arg("--target")
        .arg("rust")
        .arg("--output")
        .arg(&out_dir)
        .output()
        .expect("Failed to run wj compiler");

    let rust_file = out_dir.join("test.rs");
    let generated = fs::read_to_string(&rust_file).expect("Failed to read generated Rust file");

    println!("Generated code:\n{}", generated);

    // Compile with rustc
    let rustc_output = Command::new("rustc")
        .arg(&rust_file)
        .arg("--crate-type")
        .arg("bin")
        .arg("--edition")
        .arg("2021")
        .arg("-o")
        .arg(test_dir.join("test_bin"))
        .output()
        .expect("Failed to run rustc");

    if !rustc_output.status.success() {
        let stderr = String::from_utf8_lossy(&rustc_output.stderr);
        panic!(
            "Compilation failed:\n{}\n\nGenerated code:\n{}",
            stderr, generated
        );
    }

    // Verify: Should generate &stack.item.id (not stack.item.id)
    // Because has_item(item_id: String) → has_item(item_id: &String)
    // And stack.item.id is accessed from borrowed stack
    assert!(
        generated.contains("&stack.item.id") || generated.contains("stack.item.id.clone()"),
        "Should add & or .clone() for nested field: Expected '&stack.item.id' or 'stack.item.id.clone()'"
    );
}