C/C++ macros are particularly horrible as they are essentially text replacement on the source code. Other languages (such as Rust) have macro systems which work with ASTs and can used in isolation without interfering with other stuff.

For example there's a library in Rust which provides a `json` macro with syntax like so:

    json!({
        "foo": "bar",
        "qux": baz
    });

where `baz` can be a Rust string or integer. Note: this will typecheck, so if you provide something weird as `baz` then it won't compile, but otherwise the syntax is identical to standard JSON syantax.