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 = "analyzer_tests",
))]

// Function arguments: scale(10.0, 2.0) where params are f32

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

#[test]
fn test_function_argument_inference() {
    let source = r#"
fn scale(value: f32, factor: f32) -> f32 {
    value * factor
}

fn test() {
    let result = scale(10.0, 2.0)
}
"#;
    let rust = test_utils::compile_single(source);
    assert!(
        (rust.contains("10.0_f32") || rust.contains("10_f32"))
            && (rust.contains("2.0_f32") || rust.contains("2_f32")),
        "scale(10.0, 2.0) should generate _f32 for both args, got:\n{}",
        rust
    );
    assert!(
        !rust.contains("10.0_f64") && !rust.contains("2.0_f64"),
        "Should not generate f64 when params are f32, got:\n{}",
        rust
    );
}

/// Compound assignment: x += 1.0 where x is f32
#[test]
fn test_compound_assignment_inference() {
    let source = r#"
fn test() {
    let mut x: f32 = 0.0
    x += 1.0
    x *= 2.0
}
"#;
    let rust = test_utils::compile_single(source);
    assert!(
        rust.contains("1.0_f32") || rust.contains("1_f32"),
        "x += 1.0 should infer 1.0 as f32, got:\n{}",
        rust
    );
    assert!(
        rust.contains("2.0_f32") || rust.contains("2_f32"),
        "x *= 2.0 should infer 2.0 as f32, got:\n{}",
        rust
    );
}

/// Return type: return 10.5 where return type is f32
#[test]
fn test_return_type_inference() {
    let source = r#"
fn get_speed() -> f32 {
    return 10.5
}
"#;
    let rust = test_utils::compile_single(source);
    assert!(
        rust.contains("10.5_f32"),
        "return 10.5 should infer as f32 from return type, got:\n{}",
        rust
    );
}

/// Method call: self.update(2.0) where param is f32
#[test]
fn test_method_call_arg_inference() {
    let source = r#"
struct Widget { value: f32 }

impl Widget {
    fn set_value(self, x: f32) { }
}

fn main() {
    let w = Widget { value: 0.0 }
    w.set_value(2.0)
}
"#;
    let rust = test_utils::compile_single(source);
    assert!(
        rust.contains("2.0_f32") || rust.contains("2_f32"),
        "w.set_value(2.0) should generate _f32 when param is f32, got:\n{}",
        rust
    );
}

/// Nested expressions: (x + 1.0) * 2.0 where x is f32
#[test]
fn test_nested_expressions_inference() {
    let source = r#"
fn compute(x: f32) -> f32 {
    (x + 1.0) * 2.0
}
"#;
    let rust = test_utils::compile_single(source);
    assert!(
        (rust.contains("1.0_f32") || rust.contains("1_f32"))
            && (rust.contains("2.0_f32") || rust.contains("2_f32")),
        "Nested (x + 1.0) * 2.0 should infer both literals as f32, got:\n{}",
        rust
    );
}

/// Index: arr[i] / 2.0 when arr: Vec<f32>
#[test]
fn test_index_div_literal_inference() {
    let source = r#"
pub fn half_element(arr: Vec<f32>, i: i32) -> f32 {
    arr[i] / 2.0
}
"#;
    let rust = test_utils::compile_single(source);
    assert!(
        rust.contains("2.0_f32") || rust.contains("2_f32"),
        "arr[i] / 2.0 should infer 2.0 as f32, got:\n{}",
        rust
    );
}

/// Chained FieldAccess: self.player.position.x + offset_x when offset_x = 0.0
#[test]
fn test_chained_field_access_var_inference() {
    let source = r#"
pub struct Vec3 { x: f32, y: f32, z: f32 }
pub struct Player { position: Vec3 }
pub struct Game { player: Player }

impl Game {
    fn camera_x(self) -> f32 {
        let offset_x = 0.0
        self.player.position.x + offset_x
    }
}
"#;
    let rust = test_utils::compile_single(source);
    // offset_x = 0.0 must be f32 so it matches position.x in the addition
    assert!(
        rust.contains("0.0_f32") || rust.contains("0_f32"),
        "0.0 in offset_x = 0.0 should infer f32 from usage in self.player.position.x + offset_x, got:\n{}",
        rust
    );
}

/// Const: const MAX: f32 = 999.0
#[test]
fn test_const_float_inference() {
    let source = r#"
const MAX_SPEED: f32 = 999.0

fn get_max() -> f32 {
    MAX_SPEED
}
"#;
    let rust = test_utils::compile_single(source);
    assert!(
        rust.contains("999.0_f32") || rust.contains("999_f32"),
        "const MAX_SPEED: f32 = 999.0 should generate 999.0_f32, got:\n{}",
        rust
    );
}