docs: explain match assertions and annotation type distinctions

2026-11-15 19:14:55 +08:00
parent 903b3bbf9d
commit 57cd32eb5c
16 changed files with 58 additions and 6 deletions
@@ -190,6 +190,7 @@ fn arithmetic_precedence_and_left_associativity_form_the_expected_tree() {
    let ExprKind::Unary { operand, .. } = nested.kind else {
        panic!("expected outer negate");
    };
+    // 外层负号的操作数仍是 Negate，证明解析器保留两个前缀节点而未提前计算数值。
    assert!(matches!(
        operand.kind,
        ExprKind::Unary {