Rust has two types of macros: Declarative macros, Procedural macros. In this tutorial, we’ll cover everything you need to know about Rust macros, including an introduction to macros in Rust and a demonstration of how to use Rust macros with examples.
In this tutorial, we’ll cover everything you need to know about Rust macros, including an introduction to macros in Rust and a demonstration of how to use Rust macros with examples.
We’ll cover the following:
Rust has excellent support for macros. Macros enable you to write code that writes other code, which is known as metaprogramming.
Macros provide functionality similar to functions but without the runtime cost. There is some compile-time cost, however, since macros are expanded during compile time.
Rust macros are very different from macros in C. Rust macros are applied to the token tree whereas C macros are text substitution.
Rust has two types of macros:
TokenStream(or two) to another
TokenStream, where the output replaces the macro invocation
Let’s zoom in on both declarative and procedural macros and explore some examples of how to use macros in Rust.
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