rustdoc: Rename Tester to DoctestVisitor

The new name more accurately captures what it is.

src/librustdoc/doctest.rs

@@ -983,12 +983,12 @@ impl IndividualTestOptions {
     }
 }
 
-pub(crate) trait Tester {
-    fn add_test(&mut self, test: String, config: LangString, line: usize);
+pub(crate) trait DoctestVisitor {
+    fn visit_test(&mut self, test: String, config: LangString, line: usize);
     fn get_line(&self) -> usize {
         0
     }
-    fn register_header(&mut self, _name: &str, _level: u32) {}
+    fn visit_header(&mut self, _name: &str, _level: u32) {}
 }
 
 pub(crate) struct Collector {
@@ -1091,8 +1091,8 @@ impl Collector {
     }
 }
 
-impl Tester for Collector {
-    fn add_test(&mut self, test: String, config: LangString, line: usize) {
+impl DoctestVisitor for Collector {
+    fn visit_test(&mut self, test: String, config: LangString, line: usize) {
         let filename = self.get_filename();
         let name = self.generate_name(line, &filename);
         let crate_name = self.crate_name.clone();
@@ -1242,7 +1242,7 @@ impl Tester for Collector {
         }
     }
 
-    fn register_header(&mut self, name: &str, level: u32) {
+    fn visit_header(&mut self, name: &str, level: u32) {
         if self.use_headers {
             // We use these headings as test names, so it's good if
             // they're valid identifiers.
@@ -1287,8 +1287,8 @@ impl Tester for Collector {
 }
 
 #[cfg(test)] // used in tests
-impl Tester for Vec<usize> {
-    fn add_test(&mut self, _test: String, _config: LangString, line: usize) {
+impl DoctestVisitor for Vec<usize> {
+    fn visit_test(&mut self, _test: String, _config: LangString, line: usize) {
         self.push(line);
     }
 }

src/librustdoc/html/markdown.rs

@@ -710,7 +710,7 @@ impl<'a, I: Iterator<Item = SpannedEvent<'a>>> Iterator for Footnotes<'a, I> {
     }
 }
 
-pub(crate) fn find_testable_code<T: doctest::Tester>(
+pub(crate) fn find_testable_code<T: doctest::DoctestVisitor>(
     doc: &str,
     tests: &mut T,
     error_codes: ErrorCodes,
@@ -720,7 +720,7 @@ pub(crate) fn find_testable_code<T: doctest::Tester>(
     find_codes(doc, tests, error_codes, enable_per_target_ignores, extra_info, false)
 }
 
-pub(crate) fn find_codes<T: doctest::Tester>(
+pub(crate) fn find_codes<T: doctest::DoctestVisitor>(
     doc: &str,
     tests: &mut T,
     error_codes: ErrorCodes,
@@ -773,7 +773,7 @@ pub(crate) fn find_codes<T: doctest::Tester>(
                     nb_lines -= 1;
                 }
                 let line = tests.get_line() + nb_lines + 1;
-                tests.add_test(text, block_info, line);
+                tests.visit_test(text, block_info, line);
                 prev_offset = offset.start;
             }
             Event::Start(Tag::Heading(level, _, _)) => {
@@ -781,7 +781,7 @@ pub(crate) fn find_codes<T: doctest::Tester>(
             }
             Event::Text(ref s) if register_header.is_some() => {
                 let level = register_header.unwrap();
-                tests.register_header(s, level);
+                tests.visit_header(s, level);
                 register_header = None;
             }
             _ => {}

src/librustdoc/passes/check_doc_test_visibility.rs

@@ -44,8 +44,8 @@ pub(crate) struct Tests {
     pub(crate) found_tests: usize,
 }
 
-impl crate::doctest::Tester for Tests {
-    fn add_test(&mut self, _: String, config: LangString, _: usize) {
+impl crate::doctest::DoctestVisitor for Tests {
+    fn visit_test(&mut self, _: String, config: LangString, _: usize) {
         if config.rust && config.ignore == Ignore::None {
             self.found_tests += 1;
         }