[lldb] NFC modernize codebase with modernize-use-nullptr

Summary:
NFC = [[ https://llvm.org/docs/Lexicon.html#nfc | Non functional change ]]

This commit is the result of modernizing the LLDB codebase by using
`nullptr` instread of `0` or `NULL`. See
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-nullptr.html
for more information.

This is the command I ran and I to fix and format the code base:

```
run-clang-tidy.py \
	-header-filter='.*' \
	-checks='-*,modernize-use-nullptr' \
	-fix ~/dev/llvm-project/lldb/.* \
	-format \
	-style LLVM \
	-p ~/llvm-builds/debug-ninja-gcc
```

NOTE: There were also changes to `llvm/utils/unittest` but I did not
include them because I felt that maybe this library shall be updated in
isolation somehow.

NOTE: I know this is a rather large commit but it is a nobrainer in most
parts.

Reviewers: martong, espindola, shafik, #lldb, JDevlieghere

Reviewed By: JDevlieghere

Subscribers: arsenm, jvesely, nhaehnle, hiraditya, JDevlieghere, teemperor, rnkovacs, emaste, kubamracek, nemanjai, ki.stfu, javed.absar, arichardson, kbarton, jrtc27, MaskRay, atanasyan, dexonsmith, arphaman, jfb, jsji, jdoerfert, lldb-commits, llvm-commits

Tags: #lldb, #llvm

Differential Revision: https://reviews.llvm.org/D61847

llvm-svn: 361484

1 files changed, 4 insertions, 4 deletions

diff --git a/lldb/source/Core/ValueObjectVariable.cpp b/lldb/source/Core/ValueObjectVariable.cpp
index dae9c709ecd..5aee82493b2 100644
--- a/lldb/source/Core/ValueObjectVariable.cpp
+++ b/lldb/source/Core/ValueObjectVariable.cpp
@@ -57,7 +57,7 @@ ValueObjectVariable::ValueObjectVariable(ExecutionContextScope *exe_scope,
                                          const lldb::VariableSP &var_sp)
     : ValueObject(exe_scope), m_variable_sp(var_sp) {
   // Do not attempt to construct one of these objects with no variable!
-  assert(m_variable_sp.get() != NULL);
+  assert(m_variable_sp.get() != nullptr);
   m_name = var_sp->GetName();
 }
 
@@ -135,7 +135,7 @@ bool ValueObjectVariable::UpdateValue() {
     else
       m_error.SetErrorString("empty constant data");
     // constant bytes can't be edited - sorry
-    m_resolved_value.SetContext(Value::eContextTypeInvalid, NULL);
+    m_resolved_value.SetContext(Value::eContextTypeInvalid, nullptr);
   } else {
     lldb::addr_t loclist_base_load_addr = LLDB_INVALID_ADDRESS;
     ExecutionContext exe_ctx(GetExecutionContextRef());
@@ -261,7 +261,7 @@ bool ValueObjectVariable::UpdateValue() {
       SetValueIsValid(m_error.Success());
     } else {
       // could not find location, won't allow editing
-      m_resolved_value.SetContext(Value::eContextTypeInvalid, NULL);
+      m_resolved_value.SetContext(Value::eContextTypeInvalid, nullptr);
     }
   }
   return m_error.Success();
@@ -298,7 +298,7 @@ lldb::ModuleSP ValueObjectVariable::GetModule() {
 SymbolContextScope *ValueObjectVariable::GetSymbolContextScope() {
   if (m_variable_sp)
     return m_variable_sp->GetSymbolContextScope();
-  return NULL;
+  return nullptr;
 }
 
 bool ValueObjectVariable::GetDeclaration(Declaration &decl) {