Parse braced expressions and bracketed calls in headers 🗳

- Refactors the tokenizer to be lazy: It does not emit pre-parsed function tokens, but instead allows it's mode to be changed. The modes are tracked on a stack to allow nested compute/typesetting (pop/push).
- Introduces delimited groups into the parser, which make it easy to parse delimited expressions without handling the delimiters in the parsing code for the group's content. A group is started with `start_group`. When reaching the group's end (matching delimiter) the eat and peek methods will simply return `None` instead of the delimiter, stopping the content parser and bubbling up the call stack until `end_group` is called to clear up the situation.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/compute/table.rs b/src/compute/table.rs
index f11eacfc..75effd60 100644
--- a/src/compute/table.rs
+++ b/src/compute/table.rs
@@ -270,7 +270,7 @@ impl<V> SpannedEntry<V> {
 
     /// Create an entry with the same span for key and value.
     pub fn val(val: Spanned<V>) -> Self {
-        Self { key: Span::ZERO, val }
+        Self { key: val.span, val }
     }
 
     /// Convert from `&SpannedEntry<T>` to `SpannedEntry<&T>`