Turn report to a struct

src/report.rs

@@ -1,13 +1,28 @@
 use std::borrow::Cow;
 
 type CowString<'a> = Cow<'a, str>;
-pub type Report<'a> = Vec<(CowString<'a>, bool)>;
+pub struct Report<'a> {
+    data: Vec<(CowString<'a>, bool)>,
+}
 
-pub fn report<'a, M: Into<CowString<'a>>>(report: &mut Report<'a>, result: Option<(M, bool)>) {
-    if let Some((key, success)) = result {
-        let key = key.into();
+impl<'a> Report<'a> {
+    pub fn new() -> Self {
+        Self { data: Vec::new() }
+    }
 
-        debug_assert!(!report.iter().any(|(k, _)| k == &key), "{} already reported", key);
-        report.push((key, success));
+    pub fn push_result<M>(&mut self, result: Option<(M, bool)>)
+    where
+        M: Into<CowString<'a>>,
+    {
+        if let Some((key, success)) = result {
+            let key = key.into();
+
+            debug_assert!(!self.data.iter().any(|(k, _)| k == &key), "{} already reported", key);
+            self.data.push((key, success));
+        }
+    }
+
+    pub fn data(&self) -> &Vec<(CowString<'a>, bool)> {
+        &self.data
     }
 }