Function macro_state::proc_write_state

pub fn proc_write_state(key: &str, value: &str) -> Result<()>

An analogue for write_state! that should only be used within proc macros.

Writes the specified value as the state for the specified state key. macro_state itself functions as a compile-time key-value store, and this is how you write a value to a specific key.

If any IO error occurs while attempting to write to the specified state key, the IO error will be be returned as the Err result.

Calling proc_read_state with the same key that was written to in a proc_write_state call should result in a string literal that matches what was written via proc_write_state.

Example

use macro_state::*;

proc_write_state("my key", "some value").unwrap();
assert_eq!(proc_read_state("my key").unwrap(), "some value");