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Access console when a GUI program starts from console.
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| /// Attach console from parent process and hold it until being dropped. | |
| /// Used to access console in Windows GUI application when it's started from console. | |
| /// Does nothing if it's started from GUI because `AttachConsole` will fail. | |
| /// ```no_run | |
| /// // Add this line at the beginning to suppress console window | |
| /// #![windows_subsystem = "windows"] | |
| /// // ... | |
| /// fn main() { | |
| /// // Attach console from parent process, if any | |
| /// let c = ConsoleHolder::new(); | |
| /// // App code here | |
| /// // ... | |
| /// c.wrap(()) // Keep console open until the end of the program | |
| /// } | |
| /// ``` | |
| struct ConsoleHolder; | |
| impl ConsoleHolder { | |
| /// Attach console from parent process. | |
| pub fn new() -> Self { | |
| #[cfg(windows)] | |
| unsafe { | |
| winapi::um::wincon::AttachConsole(0xFFFFFFFF); | |
| } | |
| Self | |
| } | |
| pub fn wrap<T>(self, t: T) -> T { | |
| t | |
| } | |
| } | |
| #[cfg(windows)] | |
| impl Drop for ConsoleHolder { | |
| fn drop(&mut self) { | |
| unsafe { | |
| winapi::um::wincon::FreeConsole(); | |
| } | |
| } | |
| } |
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