Sprucing up some of alloy.

src/alloy/runtime/debug_info.cc

@@ -13,12 +13,12 @@ namespace alloy {
 namespace runtime {
 
 DebugInfo::DebugInfo()
-    : source_disasm_(0),
-      raw_hir_disasm_(0),
-      hir_disasm_(0),
-      machine_code_disasm_(0),
+    : source_disasm_(nullptr),
+      raw_hir_disasm_(nullptr),
+      hir_disasm_(nullptr),
+      machine_code_disasm_(nullptr),
       source_map_count_(0),
-      source_map_(NULL) {}
+      source_map_(nullptr) {}
 
 DebugInfo::~DebugInfo() {
   xe_free(source_map_);
@@ -44,7 +44,7 @@ SourceMapEntry* DebugInfo::LookupSourceOffset(uint64_t offset) {
       return entry;
     }
   }
-  return NULL;
+  return nullptr;
 }
 
 SourceMapEntry* DebugInfo::LookupHIROffset(uint64_t offset) {
@@ -55,7 +55,7 @@ SourceMapEntry* DebugInfo::LookupHIROffset(uint64_t offset) {
       return entry;
     }
   }
-  return NULL;
+  return nullptr;
 }
 
 SourceMapEntry* DebugInfo::LookupCodeOffset(uint64_t offset) {
@@ -66,7 +66,7 @@ SourceMapEntry* DebugInfo::LookupCodeOffset(uint64_t offset) {
       return entry;
     }
   }
-  return NULL;
+  return nullptr;
 }
 
 }  // namespace runtime