✨ More root available

2025-09-16 18:56:16 +08:00
parent 656f29623b
commit dd4a9f524e
4 changed files with 389 additions and 49 deletions
--- a/lib/parser.dart
+++ b/lib/parser.dart
@@ -100,6 +100,21 @@ class Parser {
      if (current != ')') throw Exception("sqrt 缺少 )");
      eat();
      expr = SqrtExpr(inner);
+    } else if (input.startsWith("root", pos)) {
+      pos += 4;
+      if (current != '(') throw Exception("root 缺少 (");
+      eat();
+      var indexExpr = parse();
+      if (current != ',') throw Exception("root 缺少 ,");
+      eat();
+      var inner = parse();
+      if (current != ')') throw Exception("root 缺少 )");
+      eat();
+      if (indexExpr is IntExpr) {
+        expr = SqrtExpr(inner, indexExpr.value);
+      } else {
+        throw Exception("root 的第一个参数必须是整数");
+      }
    } else if (input.startsWith("cos", pos)) {
      pos += 3;
      if (current != '(') throw Exception("cos 缺少 (");