From 1d44c46539fa1a40c74b4354022f5aeaeb9c3b6a Mon Sep 17 00:00:00 2001 From: Davide Italiano Date: Fri, 27 Jul 2018 19:57:30 +0000 Subject: Recommit [DataFormatters] Add formatter for C++17 std::optional. This should have all the correct files now. Patch by Shafik Yaghmour. Differential Revision: https://reviews.llvm.org/D49271 llvm-svn: 338156 --- lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp') diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp index 95e02a473cd..6c5a4f6095c 100644 --- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp +++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp @@ -33,6 +33,28 @@ using namespace lldb; using namespace lldb_private; using namespace lldb_private::formatters; +bool lldb_private::formatters::LibcxxOptionalSummaryProvider( + ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) { + ValueObjectSP valobj_sp(valobj.GetNonSyntheticValue()); + if (!valobj_sp) + return false; + + // An optional either contains a value or not, the member __engaged_ is + // a bool flag, it is true if the optional has a value and false otherwise. + ValueObjectSP engaged_sp( + valobj_sp->GetChildMemberWithName(ConstString("__engaged_"), true)); + + if (!engaged_sp) + return false; + + llvm::StringRef engaged_as_cstring( + engaged_sp->GetValueAsUnsigned(0) == 1 ? "true" : "false"); + + stream.Printf(" Has Value=%s ", engaged_as_cstring.data()); + + return true; +} + bool lldb_private::formatters::LibcxxSmartPointerSummaryProvider( ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) { ValueObjectSP valobj_sp(valobj.GetNonSyntheticValue()); -- cgit v1.2.3