add configure method, to enable users to own a valid configured insta…

…nce before calling

src/lib.rs

@@ -342,9 +342,8 @@ impl SimpleLogger {
         self
     }
 
-    /// 'Init' the actual logger, instantiate it and configure it,
-    /// this method MUST be called in order for the logger to be effective.
-    pub fn init(mut self) -> Result<(), SetLoggerError> {
+    /// Configure the logger
+    pub fn configure(&mut self) {
         #[cfg(all(windows, feature = "colored"))]
         set_up_color_terminal();
 
@@ -358,8 +357,13 @@ impl SimpleLogger {
             .map(|lvl| lvl.max(self.default_level))
             .unwrap_or(self.default_level);
         log::set_max_level(max_level);
-        log::set_boxed_logger(Box::new(self))?;
-        Ok(())
+    }
+
+    /// 'Init' the actual logger and instantiate it,
+    /// this method MUST be called in order for the logger to be effective.
+    pub fn init(mut self) -> Result<(), SetLoggerError> {
+        self.configure();
+        log::set_boxed_logger(Box::new(self))
     }
 }