Vector of functions in Rust -

Vector of functions in Rust -

i learning rust , struggling lifetimes while creating simple observer store callback of arbitrary type.

i started basic struct

struct signal<t> { slots: vec<|t|> }

which got me initial lifetime error

signal_test.rs:7:16: 7:19 error: explicit lifetime bound required signal_test.rs:7 slots: vec<|t|> ^~~ error: aborting due previous error

so next seek adding lifetime specifiers.

struct signal<'r, t> { slots: vec<'r |t|> }

which gets me new errors

signal_test.rs:7:12: 7:23 error: wrong number of lifetime parameters: expected 0, found 1 [e0107] signal_test.rs:7 slots: vec<'r |t|> ^~~~~~~~~~~ signal_test.rs:7:19: 7:22 error: explicit lifetime bound required signal_test.rs:7 slots: vec<'r |t|>

i have not been able find plenty rust lifetime documentation hint @ need prepare this. not pattern utilize in rust. help , comments appreciated.

try using this:

struct signal<'r, t> { slots: vec<|t|: 'r> }

rust