fix appendix anchors

src/extract.rs

@@ -40,6 +40,9 @@ lazy_static! {
     };
     static ref KEY_WORDS_SET: RegexSet =
         RegexSet::new(KEY_WORDS.iter().map(|(r, _)| r.as_str())).unwrap();
+
+    static ref SECTION_ID: Regex = Regex::new(r"^[0-9](\.[0-9])*").unwrap();
+    static ref APPENDIX_ID: Regex = Regex::new(r"^[A-Z](\.[0-9])*").unwrap();
 }
 
 #[derive(Debug, StructOpt)]
@@ -301,7 +304,7 @@ fn write_rust<W: std::io::Write>(
     section: &Section,
     features: &[Feature],
 ) -> Result<(), std::io::Error> {
-    writeln!(w, "//! {}#section-{}", target, section.id)?;
+    writeln!(w, "//! {}#{}{}", target, anchor_prefix(section.id.value), section.id)?;
     writeln!(w, "//!")?;
     writeln!(w, "//! {}", section.full_title)?;
     writeln!(w, "//!")?;
@@ -311,7 +314,7 @@ fn write_rust<W: std::io::Write>(
     writeln!(w)?;
 
     for feature in features {
-        writeln!(w, "//= {}#section-{}", target, section.id)?;
+        writeln!(w, "//= {}#{}{}", target, anchor_prefix(section.id.value), section.id)?;
         writeln!(w, "//= type=spec")?;
         writeln!(w, "//= level={}", feature.level)?;
         for line in feature.quote.iter() {
@@ -329,7 +332,7 @@ fn write_toml<W: std::io::Write>(
     section: &Section,
     features: &[Feature],
 ) -> Result<(), std::io::Error> {
-    writeln!(w, "target = \"{}#section-{}\"", target, section.id)?;
+    writeln!(w, "target = \"{}#{}{}\"", target, anchor_prefix(section.id.value), section.id)?;
     writeln!(w)?;
     writeln!(w, "# {}", section.full_title)?;
     writeln!(w, "#")?;
@@ -351,3 +354,13 @@ fn write_toml<W: std::io::Write>(
 
     Ok(())
 }
+
+fn anchor_prefix(id: &str) -> &str {
+    if let Some(_) = SECTION_ID.captures(id) {
+        &"section-"
+    } else if let Some(_) = APPENDIX_ID.captures(id) {
+        &"appendix-"
+    } else {
+        &""
+    }
+}