fix(compiler): correct CIE semantics and diagnostic locations

Use standard WHILE headers and default-public class fields, resolve
pseudocode identifiers without case sensitivity, and check signed i64
literal boundaries before conversion. Preserve source locations across
recursive emission and function diagnostics.

Add 22 regression cases and update compiler examples and documentation.
Validated all 69 CTest entries with the original Linux Actions seed and
verified the release package's embedded, native and IR output paths.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/CodeGen/ControlFlowGen.cc b/lib/CodeGen/ControlFlowGen.cc
index d34f640..17f43f2 100644
--- a/lib/CodeGen/ControlFlowGen.cc
+++ b/lib/CodeGen/ControlFlowGen.cc
@@ -190,6 +190,7 @@ void CodeGen::emitCaseStmt(CaseStmtAST *Stmt) {
     auto *After = BasicBlock::Create(*TheContext, "case_cont", F);
     auto SavedArrays = Arrays->snapshotTable();
     for (const auto &Branch : Stmt->getBranches()) {
+        SaveAndRestore<int> Location(DiagnosticLine, Branch.Line);
         auto *Body = BasicBlock::Create(*TheContext, "case_body", F);
         auto *Next = BasicBlock::Create(*TheContext, "case_next", F);
         auto Compare = [&](int Op, ExprAST *Label) -> Value * {
@@ -199,7 +200,7 @@ void CodeGen::emitCaseStmt(CaseStmtAST *Stmt) {
             }
             const TypeInfo *LabelType = getExprTypeInfo(Label);
             if (!LabelType) {
-                reportError("Cannot determine CASE label type at line %d", Branch.Line);
+                reportError("Cannot determine CASE label type");
                 return nullptr;
             }
             Value *LabelValue = emitExpr(Label);