Merge branch 'liw/titles' into 'master'

Change: require docgen, codegen to fail if document has no title

See merge request larswirzenius/subplot!2

1 files changed, 9 insertions, 0 deletions

diff --git a/src/ast.rs b/src/ast.rs
index e6fd5db..f59d9f4 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -109,6 +109,15 @@ impl<'a> Document {
         self.files.files()
     }
 
+    /// Check that document has a title in its metadata.
+    pub fn has_title(&self) -> Result<()> {
+        if self.meta().title().is_empty() {
+            Err(Error::no_title())
+        } else {
+            Ok(())
+        }
+    }
+
     /// Typeset a Subplot document.
     pub fn typeset(&mut self) {
         let mut visitor = TypesettingVisitor::new(&self.meta.bindings);