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/lib.rs b/src/lib.rs
index e30e41b2..30196034 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -87,7 +87,7 @@ impl Typesetter {
 
     /// Parse source code into a syntax tree.
     pub fn parse(&self, src: &str) -> Pass<SyntaxTree> {
-        parse(src, Pos::ZERO)
+        parse(src)
     }
 
     /// Layout a syntax tree and return the produced layout.