Upstream HeuristicResolver from clangd to libSema

[HighCommander4]

Filing this issue to track upstreaming the HeuristicResolver component from clangd to libSema, as originally discussed in clangd/clangd#1662.

Task list:

• Add a unit test suite for HeuristicResolver clangd/clangd#2154
• RFC: https://discourse.llvm.org/t/rfc-upstream-heuristicresolver-from-clangd-to-libsema/84004
• [clang][Sema] Upstream HeuristicResolver from clangd #121314
• Fix bugs that depend on the upstreaming
  • Code completion not working with smart pointers in template class header files in VS Code clangd/clangd#810
  • Nested struct inside a templated class doesn't provide completions clangd/clangd#1249

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Nathan Ridge (HighCommander4)

Filing this issue to track upstreaming the HeuristicResolver component from clangd to libSema, as originally discussed in https://github.com/clangd/clangd/discussions/1662.

Task list:

• Add a unit test suite for HeuristicResolver clangd/clangd#2154
• Post Discourse RFC as requested in Upstreaming HeuristicResolver to the clang libraries? clangd/clangd#1662 (comment)
• Post a PR implementing the upstreaming

[llvmbot]

@llvm/issue-subscribers-clangd

Author: Nathan Ridge (HighCommander4)

Filing this issue to track upstreaming the HeuristicResolver component from clangd to libSema, as originally discussed in https://github.com/clangd/clangd/discussions/1662.

Task list:

• Add a unit test suite for HeuristicResolver clangd/clangd#2154
• Post Discourse RFC as requested in Upstreaming HeuristicResolver to the clang libraries? clangd/clangd#1662 (comment)
• Post a PR implementing the upstreaming