feat(driver): add #LIB directive hiding library lines in runtime errors

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/cps/Lexer.h b/include/cps/Lexer.h
index 1c4723e..588a5fa 100644
--- a/include/cps/Lexer.h
+++ b/include/cps/Lexer.h
@@ -120,6 +120,8 @@ class Lexer {
     int CurrentLine = 1;
     int TokenLine = 1;
     bool HadError = false;
+    bool Library = false;
+    bool LineStart = true;
     struct TokenData {
         int Kind, Line;
         std::string Identifier, String;
@@ -145,6 +147,7 @@ public:
     int peekToken(unsigned Offset = 0);
     int peekLine(unsigned Offset = 0);
     int getLine() const { return TokenLine; }
+    bool isLibrary() const { return Library; }
     bool hadError() const { return HadError; }
 };