Mapping for String Types

Both bounded and unbounded IDL string types are mapped to String from the standard library.

// IDL
typedef string MyString;
typedef wstring MyWideString;

#![allow(unused)]
fn main() {
// Rust
pub type MyString = String;
pub type MyWideString = String;
}

Default Value

The default value for a string is an empty string:

#![allow(unused)]
fn main() {
String::new()
}

Bounded Strings

IDL allows specifying a maximum length for strings. This bound is not enforced at the type level in Rust, but is checked during serialization. An implementation may choose to provide a custom BoundedString<N> type for such purposes.

// IDL
typedef string<100> BoundedString;

#![allow(unused)]
fn main() {
// Rust - bound is not reflected in the type
pub type BoundedString = String;
}

Wide String Types

The char type in Rust is always a UTF-8 character. The String type is only a collection of chars; for that reason, both IDL strings and wide strings are mapped to the String type in Rust.