Lua Console Overhaul in progress

Source/Integration/LuaCall.h

@@ -9,6 +9,23 @@
 
 class UlxLuaValues;
 
+// Classify lua code syntactically:
+//
+//  SlashCommand: starts with a slash, therefore, not lua
+//  WhitespaceOnly: the input only contains whitespace
+//  ValidSyntax: the input is valid lua code
+//  TruncatedCode: the input is truncated
+//  InvalidSyntax: invalid lua
+//
+UENUM(BlueprintType)
+enum class ElxLuaSyntaxCheck : uint8 {
+	SlashCommand,
+	Whitespace,
+	ValidLua,
+	TruncatedLua,
+	InvalidLua,
+};
+
 /////////////////////////////////////////////////////////////////
 //
 // These are the types that can actually be packed into
@@ -118,9 +135,12 @@ public:
 	static FString AllKnownReturnValueTypes() { return AllFunctionsWithPrefix(TEXT("LuaCallReturnValue_")); }
 
 public:
+	// Syntactically validate lua code.  Parses the code and
+	// returns an error message.  If the code is error-free, the
+	// error message is the empty string.
 	//
-	// Functions that do miscellaneous things.
-	//
+	UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", ExpandEnumAsExecs="Result"), Category = "Luprex|Call Lua Function")
+	static void ValidateLua(ElxLuaSyntaxCheck &Result, FString &ErrorMessage, UObject *context, const FString &Code);
 
 	UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
 	static void LuaCallBegin(UObject *context, const FString &ClassName, const FString &FunctionName);