From 7f9e0c4f5be991e3b8cc97044ff38abdac66c6a0 Mon Sep 17 00:00:00 2001
From: Brian Fiete <bfiete@gmail.com>
Date: Sat, 19 Sep 2020 10:02:51 -0700
Subject: [PATCH] Support for 'decltype(val).MemberName' expressions

---
 IDEHelper/Compiler/BfReducer.cpp | 16 ++++++++++++++--
 IDEHelper/Compiler/BfReducer.h   |  3 ++-
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/IDEHelper/Compiler/BfReducer.cpp b/IDEHelper/Compiler/BfReducer.cpp
index c66be498..9d3e001c 100644
--- a/IDEHelper/Compiler/BfReducer.cpp
+++ b/IDEHelper/Compiler/BfReducer.cpp
@@ -2182,6 +2182,14 @@ BfExpression* BfReducer::CreateExpression(BfAstNode* node, CreateExprFlags creat
 					}
 				}
 			}
+			else if (tokenNode->GetToken() == BfToken_Decltype)
+			{
+				auto typeRef = CreateTypeRef(tokenNode, CreateTypeRefFlags_EarlyExit);
+				if (typeRef != NULL)
+				{
+					exprLeft = CreateMemberReferenceExpression(typeRef);
+				}
+			}
 
 			if (exprLeft == NULL)
 			{
@@ -4685,6 +4693,9 @@ BfTypeReference* BfReducer::DoCreateTypeRef(BfAstNode* firstNode, CreateTypeRefF
 					
 					isHandled = true;
 					firstNode = delegateTypeRef;
+
+					if ((createTypeRefFlags & CreateTypeRefFlags_EarlyExit) != 0)
+						return delegateTypeRef;
 				}
 				else if (token == BfToken_Decltype)
 				{
@@ -4701,7 +4712,8 @@ BfTypeReference* BfReducer::DoCreateTypeRef(BfAstNode* firstNode, CreateTypeRefF
 					isHandled = true;
 					firstNode = declTypeRef;
 
-					//return declTypeRef;
+					if ((createTypeRefFlags & CreateTypeRefFlags_EarlyExit) != 0)
+						return declTypeRef;					
 				}
 				else if (token == BfToken_LParen)
 				{
@@ -4770,7 +4782,7 @@ BfTypeReference* BfReducer::DoCreateTypeRef(BfAstNode* firstNode, CreateTypeRefF
 			{
 				Fail("Expected type", firstNode);
 				return NULL;
-			}
+			}			
 		}
 	}
 
diff --git a/IDEHelper/Compiler/BfReducer.h b/IDEHelper/Compiler/BfReducer.h
index 7b22d10b..cf414a89 100644
--- a/IDEHelper/Compiler/BfReducer.h
+++ b/IDEHelper/Compiler/BfReducer.h
@@ -46,7 +46,8 @@ public:
 		CreateTypeRefFlags_None,
 		CreateTypeRefFlags_NoParseArrayBrackets = 1,
 		CreateTypeRefFlags_SafeGenericParse = 2,
-		CreateTypeRefFlags_AllowSingleMemberTuple = 4
+		CreateTypeRefFlags_AllowSingleMemberTuple = 4,
+		CreateTypeRefFlags_EarlyExit = 8
 	};
 
 	struct BfVisitorPos