♻️ Replace the math expressions with own calculator

2025-09-14 13:19:56 +08:00
parent 722ef9ca21
commit 2a56a83898
4 changed files with 90 additions and 13 deletions
--- a/lib/parser.dart
+++ b/lib/parser.dart
@@ -99,6 +99,13 @@ class Parser {
      return TanExpr(inner);
    }

+    // 解析变量 (单个字母)
+    if (RegExp(r'[a-zA-Z]').hasMatch(current)) {
+      var varName = current;
+      eat();
+      return VarExpr(varName);
+    }
+
    // 解析整数
    var buf = '';
    while (!isEnd && RegExp(r'\d').hasMatch(current)) {