initial commit

crates/masking/src/strategy.rs

@@ -0,0 +1,38 @@
+use core::fmt;
+
+/// Debugging trait which is specialized for handling secret values
+pub trait Strategy<T> {
+    /// Format information about the secret's type.
+    fn fmt(value: &T, fmt: &mut fmt::Formatter<'_>) -> std::fmt::Result;
+}
+
+/// Debug with type
+pub struct WithType;
+
+impl<T> Strategy<T> for WithType {
+    fn fmt(_: &T, fmt: &mut fmt::Formatter<'_>) -> std::fmt::Result {
+        fmt.write_str("*** ")?;
+        fmt.write_str(std::any::type_name::<T>())?;
+        fmt.write_str(" ***")
+    }
+}
+
+/// Debug without type
+pub struct WithoutType;
+
+impl<T> Strategy<T> for WithoutType {
+    fn fmt(_: &T, fmt: &mut fmt::Formatter<'_>) -> std::fmt::Result {
+        fmt.write_str("*** ***")
+    }
+}
+
+pub struct NoMasking;
+
+impl<T> Strategy<T> for NoMasking
+where
+    T: fmt::Display,
+{
+    fn fmt(val: &T, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(&format!("{}", val))
+    }
+}