Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Rust Error "error: expected item, found 'let'"
Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
The error message "error: expected item, found 'let'" is commonly encountered in Rust
when you mistakenly place a let statement in an invalid location.
A let statement can only be used …
Concatenate Static Arrays in Rust
Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Generating static arrays during compile time in Rust
References
Memory Layout in Rust
Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Different Types of Memory in Rust¶
Rust has 3 different types of memory: static memory, stack memory and heap memory.
Static variables live in static memory and is determined at compile time. It is suggested that you define large data variables as static so that they live in the static memory instead of stack memory to avoid stack overflow problems. Of course, another way is to put those variables into heap memory (but at the cost of slight performance loss).
Implement a Singleton in Rust
Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Tips and Traps¶
std::cell::OnceCell is a partial implementation of
once_cellin the Rust standard library.There are 2 Rust crates lazy_static and once_cell for (lazy) once assignment (which can be used to create singletons). once_cell