feature-gate vs surrealdb-extras-proc-macro vs placenew

A simple macro for feature-gating modules and types

A `cargo generate` template for quick-starting a procedural macro crate

A crate providing the macro 'place_boxed' which allows you to create a object in-place on the heap using the normal struct initializer, the macro uses Box::new_uninit(), initializes all members using the values from the struct initializer, and then calls .assume_init() for regular value types => writes the expression in-place for array types ([T; N]) => generates a for loop for expressions such as [0; 100], and generates a sequence of arr[i] = v for an expression such as [0, 1, 2, 3]