[AST] explicit PrintOptions default constructor (#18142)
For use in LLDB.
diff --git a/include/swift/AST/PrintOptions.h b/include/swift/AST/PrintOptions.h
index 9cd1808..f9d4cbd 100644
--- a/include/swift/AST/PrintOptions.h
+++ b/include/swift/AST/PrintOptions.h
@@ -363,6 +363,9 @@
BracketOptions BracketOptions;
+ // This is explicit to guarantee that it can be called from LLDB.
+ PrintOptions() {}
+
bool excludeAttrKind(AnyAttrKind K) const {
if (std::any_of(ExcludeAttrList.begin(), ExcludeAttrList.end(),
[K](AnyAttrKind other) { return other == K; }))