feat(constants): implement literal constants with lexical scope

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/Lexer/Lexer.cc b/lib/Lexer/Lexer.cc
index fcc9a40..59247cf 100644
--- a/lib/Lexer/Lexer.cc
+++ b/lib/Lexer/Lexer.cc
@@ -70,6 +70,7 @@ int Lexer::readToken() {
         while (isalnum((LastChar = Input.get())) || LastChar == '_')
             IdentifierStr += static_cast<char>(LastChar);
 
+        if (IdentifierStr == "CONSTANT") return tok_constant;
         if (IdentifierStr == "DECLARE") return tok_declare;
         if (IdentifierStr == "INTEGER") return tok_integer_kw;
         if (IdentifierStr == "BOOLEAN") return tok_boolean_kw;