feat(library)!: replace #LIB with __LIB source regions

Track library mode by original source line, including deferred template bodies
and automatic object cleanup. Update call lines from ordinary code and migrate
the embedded standard library to PP_DEFINE __LIB.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/include/cps/RuntimeCheck.h b/include/cps/RuntimeCheck.h
index d2ee1ea..71943d4 100644
--- a/include/cps/RuntimeCheck.h
+++ b/include/cps/RuntimeCheck.h
@@ -3,6 +3,8 @@
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include <cstdint>
+#include <functional>
+#include <utility>
 #include <string>
 
 namespace cps {
@@ -18,7 +20,7 @@ class RuntimeCheck {
     llvm::FunctionCallee StderrFunc;   // Windows: __acrt_iob_func(2)
     llvm::GlobalVariable *StderrVar;   // elsewhere: the C library's stderr
     ExceptionHandler &Exceptions;
-    bool LibraryMode = false;
+    std::function<bool(int)> LibraryLookup;
     llvm::GlobalVariable *UserLine;
     llvm::Value *DivZeroMsg;
     llvm::Value *OutOfBoundsMsg;
@@ -33,7 +35,7 @@ public:
     RuntimeCheck(llvm::Module &M, llvm::LLVMContext &C, llvm::IRBuilder<> &B,
                  ExceptionHandler &EH);
 
-    void setLibraryMode(bool Enabled) { LibraryMode = Enabled; }
+    void setLibraryLookup(std::function<bool(int)> Lookup) { LibraryLookup = std::move(Lookup); }
     llvm::Value *lineValue(int Line);
     void setUserLine(int Line);