================
@@ -65,7 +65,9 @@ void
TemplateArgumentHasher::AddTemplateArgument(TemplateArgument TA) {
switch (Kind) {
case TemplateArgument::Null:
- llvm_unreachable("Expected valid TemplateArgument");
+ // These can occur in incomplete substitutions performed with code
+ // completion (see PartialOverloading).
----------------
mizvekov wrote:
It's the term of art within clang, and the name of the flag as used in source
code.
A search on doxygen for this term should lead to:
```C++
/// AddOverloadCandidate - Adds the given function to the set of
/// candidate functions, using the given function call arguments. If
/// @p SuppressUserConversions, then don't allow user-defined
/// conversions via constructors or conversion operators.
///
/// \param PartialOverloading true if we are performing "partial" overloading
/// based on an incomplete set of function arguments. This feature is used by
/// code completion.
```
This term can also easily be greped for, and there are no irrelevant results.
But this is mostly undocumented.
https://github.com/llvm/llvm-project/pull/141890
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