lang: basic attrset parser

crates/lang/src/parser/grammar/expression/collection/attr_set.rs

@@ -1,5 +1,45 @@
-use crate::parser::{CompletedMarker, Parser};
+use crate::parser::{
+    error::SyntaxError,
+    grammar::expression::{atom, expression},
+    CompletedMarker, Marker, Parser,
+    SyntaxKind::*,
+};
 
 pub fn attr_set(p: &mut Parser) -> CompletedMarker {
-    todo!()
+    let start = p.start("attr_set_start");
+    assert!(p.eat(L_BRACE));
+
+    loop {
+        if attr(p).is_some() {
+            // TODO: handle others
+            if p.eat(COMMA) {
+                continue;
+            } else if p.eat(R_BRACE) {
+                return start.complete(p, ATTR_SET);
+            }
+            // TODO: check for newline  and stuff following that for recov of others
+        } else if p.eat(R_BRACE) {
+            return start.complete(p, ATTR_SET);
+        }
+    }
+}
+
+fn attr(p: &mut Parser) -> Option<CompletedMarker> {
+    if p.at(IDENT) {
+        let attr_start = p.start("attr");
+        let attr_name_start = p.start("attr_name");
+        p.do_bump();
+        attr_name_start.complete(p, ATTR_NAME);
+
+        // TODO: handle comma, expr/atom, other
+        p.eat(COLON);
+
+        // TODO: handle failed expr parser too
+        let attr_value = p.start("attr_value");
+        let _ = expression(p);
+        attr_value.complete(p, ATTR_VALUE);
+        Some(attr_start.complete(p, ATTR))
+    } else {
+        None
+    }
 }