feat(lexer): add C_STRING literal suffix

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

2 files changed, 4 insertions, 1 deletions

diff --git a/include/cps/AST.h b/include/cps/AST.h
index 2b78aaa..bb6d090 100644
--- a/include/cps/AST.h
+++ b/include/cps/AST.h
@@ -51,9 +51,11 @@ public:
 
 class StringExprAST : public ExprAST {
     std::string Val;
+    bool CString;
 public:
-    StringExprAST(const std::string &Val) : Val(Val) {}
+    StringExprAST(const std::string &Val, bool CString = false) : Val(Val), CString(CString) {}
     const std::string &getVal() const { return Val; }
+    bool isCString() const { return CString; }
 };
 
 class VariableExprAST : public ExprAST {
diff --git a/include/cps/Lexer.h b/include/cps/Lexer.h
index 588a5fa..b514904 100644
--- a/include/cps/Lexer.h
+++ b/include/cps/Lexer.h
@@ -49,6 +49,7 @@ enum Token {
 
     tok_string_kw = -30,
     tok_string_literal = -36,
+    tok_c_string_literal = -37,
     tok_char_kw = -38,
     tok_char_literal = -39,