utils: name_pool

Author: krishpranav

src/utils/name_pool.cr

@@ -0,0 +1,35 @@
+# -----------------------------------------------------------------------
+# This file is part of MoonScript
+#
+# MoonSript is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# MoonSript is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with MoonSript.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Copyright (C) 2025 Krisna Pranav, MoonScript Developers
+# -----------------------------------------------------------------------
+
+module MoonScript
+    class NamePool(T, B)
+        @cache = {} of Tuple(B, T) => String
+        @current = {} of B => String
+
+        def initialize(@initial = 'a'.pred.to_s)
+        end
+
+        def of(subject: T, base: B)
+            @cache[{base, subject}] ||= next_name(subject, base)
+        end
+
+        def next_name(subject: T:, base: B)
+            name = @current[base] = (@current[base] ? || @initial).succ
+        end
+end