[lldb][Language] Add Language::GetDisplayNameForLanguageType API (#161803)

The intention for this API is to be used when presenting language names
to the user, e.g., in expression evaluation diagnostics or LLDB errors.

Most uses of `GetNameForLanguageType` can be probably replaced with
`GetDisplayNameForLanguageType`, but that's out of scope of this PR.

This uses `llvm::dwarf::LanguageDescription` under the hood, so we would
lose the version numbers in the names. If we deem those to be important,
we could switch to an implementation that hardcodes a list of
user-friendly names with version numbers included.

The intention is to use it from
https://github.com/llvm/llvm-project/pull/161688

Depends on https://github.com/llvm/llvm-project/pull/161804

1 files changed, 4 insertions, 0 deletions

diff --git a/lldb/source/Target/Language.cpp b/lldb/source/Target/Language.cpp
index c8cb0ca31e91..395718ecbe29 100644
--- a/lldb/source/Target/Language.cpp
+++ b/lldb/source/Target/Language.cpp
@@ -271,6 +271,10 @@ const char *Language::GetNameForLanguageType(LanguageType language) {
     return language_names[eLanguageTypeUnknown].name;
 }
 
+llvm::StringRef Language::GetDisplayNameForLanguageType(LanguageType language) {
+  return SourceLanguage(language).GetDescription();
+}
+
 void Language::PrintSupportedLanguagesForExpressions(Stream &s,
                                                      llvm::StringRef prefix,
                                                      llvm::StringRef suffix) {