[tanin]

I find that Rust's syntax/ecosystem is much more modern and pleasant to use. Some examples are: pattern matching, immutable variable, better build and dependency system, and many more.

There are some concepts like lifetime that you have to learn. But you can always use unsafe pointer and look at Rust as a modern version of C.

[watergatorman]

I looked at the Rust site and their published grammar. It is VERY incomplete, missing entire productions.

I cannot determine if the syntax of Rust is "better" than that of C.

At least the ISO "C" std. organization publishes a complete syntax of their language.

Perhaps someone knows where there is a complete grammar for the Rust language?

I cannot find one.

[tanin]

I might misunderstand the question here.

Could you elaborate more why the complete grammar of Rust is important for writing a compiler (for any programming langugage) in Rust?

I thought the question was about whether to write a compiler in Rust or C. But it seems you meant writing a parser that parsed the Rust language itself. Or there's something I misunderstand here.