macro-ruby

一个在编译时通过Ruby生成Rust代码的crate。（已测试与mruby 3.0.0兼容）

要求

确保你的mruby在PATH中。

如何使用

    use macro_ruby::ruby_code_str;

    // ruby_code_str! generates a &str based on what has been printed from Ruby.
    assert_eq!(
        ruby_code_str!("puts 'hi'"),
        "hi\n"
    );


    assert_eq!(
        ruby_code_str!("print 'hi'"),
        "hi"
    );

    use macro_ruby::ruby_code_to;

    // ruby_code_to! generates a value which type is based off of input
    // and the content on what has been printed from Ruby.
    assert_eq!(
        ruby_code_to!(i32 "print 500+500"),
        1000
    );


    assert_eq!(
        ruby_code_to!(u8 "print 500+500"), // Will panic because u8 overflows
        1000
    );

    use macro_ruby::ruby_code_ast;

    // ruby_code_ast! generates real rust code based on what has been printed
    ruby_code_ast!(r#"
        puts "let a = 1;"
    "#)

    assert_eq!(a, 1);

如果你想从外部文件执行Ruby代码，可以使用我们宏的file变体

使用YARV代替mruby

如果你想使用YARV（官方Ruby解释器）而不是mruby，只需启用“yarv”或“full”特性（yarv和full是别名）。

所以在我们的cargo.toml中我们将有

[dependencies]
macro-ruby = { version = current_version, features = ["yarv"] }

或

[dependencies]
macro-ruby = { version = current_version, features = ["full"] }

(其中current_version是macro-ruby的实际当前版本)