string_as_enum_value.rs

#[deriving(Show)]
enum Token<'a> {
    Integer(int),
    String(&'a str)
}

fn generate_int() -> Token {
    Integer(23)
}

fn generate_str() -> Token {
    let s = format!("just a test: {}", 42);
    String(s.as_slice())
}

fn main() {
    println!("{}", generate_int());
    println!("{}", generate_str());
}

/*
string_as_enum_value.rs:13:12: 13:13 error: `s` does not live long enough
string_as_enum_value.rs:13     String(s.as_slice())
                                      ^
string_as_enum_value.rs:11:28: 14:2 note: reference must be valid for the anonymous lifetime #1 defined on the block at 11:27...
string_as_enum_value.rs:11 fn generate_str() -> Token {
string_as_enum_value.rs:12     let s = format!("just a test: {}", 42);
string_as_enum_value.rs:13     String(s.as_slice())
string_as_enum_value.rs:14 }
string_as_enum_value.rs:11:28: 14:2 note: ...but borrowed value is only valid for the block at 11:27
string_as_enum_value.rs:11 fn generate_str() -> Token {
string_as_enum_value.rs:12     let s = format!("just a test: {}", 42);
string_as_enum_value.rs:13     String(s.as_slice())
string_as_enum_value.rs:14 }
*/