refactor: replace SubplotError::JsonError with a more specific one

SubplotError::JsonError is a generic error, but we actually only parse
JSON when parsing the AST from Pandoc. Replace it with a ::AstJson
error to be more specific, and hopefully more helpful to the user.

Sponsored-by: author

1 files changed, 2 insertions, 2 deletions

diff --git a/src/doc.rs b/src/doc.rs
index 71910f1..490a613 100644
--- a/src/doc.rs
+++ b/src/doc.rs
@@ -146,7 +146,7 @@ impl<'a> Document {
         P: AsRef<Path> + Debug,
     {
         trace!("Parsing document...");
-        let ast: Pandoc = serde_json::from_str(json)?;
+        let ast: Pandoc = serde_json::from_str(json).map_err(SubplotError::AstJson)?;
         Self::from_ast(basedir, markdowns, ast, style, template)
     }
 
@@ -217,7 +217,7 @@ impl<'a> Document {
     /// This is useful in a Pandoc filter, so that the filter can give
     /// it back to Pandoc for typesetting.
     pub fn ast(&self) -> Result<String, SubplotError> {
-        let json = serde_json::to_string(&self.ast)?;
+        let json = serde_json::to_string(&self.ast).map_err(SubplotError::AstJson)?;
         Ok(json)
     }