C#: Add conditional array access to l-vals#535
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This MR contains the following updates: | Package | Update | Change | |---|---|---| | [opengrep/opengrep](https://github.com/opengrep/opengrep) | minor | `v1.14.1` → `v1.15.1` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>opengrep/opengrep (opengrep/opengrep)</summary> ### [`v1.15.1`](https://github.com/opengrep/opengrep/releases/tag/v1.15.1): Opengrep 1.15.1 [Compare Source](opengrep/opengrep@v1.15.0...v1.15.1) #### Bug fixes - Clojure translation improvements by [@​dimitris-m](https://github.com/dimitris-m) in [#​534](opengrep/opengrep#534) **Full Changelog**: <opengrep/opengrep@v1.15.0...v1.15.1> ### [`v1.15.0`](https://github.com/opengrep/opengrep/releases/tag/v1.15.0): Opengrep 1.15.0 [Compare Source](opengrep/opengrep@v1.14.1...v1.15.0) #### What's Changed - Clojure translation part III by [@​dimitris-m](https://github.com/dimitris-m) in [#​527](opengrep/opengrep#527) - Php modernisation by [@​corneliuhoffman](https://github.com/corneliuhoffman) in [#​529](opengrep/opengrep#529) - Intrafile tainting with variadic functions by [@​maciejpirog](https://github.com/maciejpirog) in [#​538](opengrep/opengrep#538) - C#: The `field` implicit parameter can be skipped in a pattern by [@​maciejpirog](https://github.com/maciejpirog) in [#​525](opengrep/opengrep#525) - C#: Add conditional array access (`?[...]`) to l-values by [@​maciejpirog](https://github.com/maciejpirog) in [#​535](opengrep/opengrep#535) - C#: Collection expressions vs attributes with targets (parser fix) by [@​maciejpirog](https://github.com/maciejpirog) in [#​539](opengrep/opengrep#539) - Add `noopengrep` to the default nosem patterns by [@​dimitris-m](https://github.com/dimitris-m) in [#​533](opengrep/opengrep#533) **Full Changelog**: <opengrep/opengrep@v1.14.1...v1.15.0> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi44MS4yIiwidXBkYXRlZEluVmVyIjoiNDIuODIuMyIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiUmVub3ZhdGUgQm90IiwiYXV0b21hdGlvbjpib3QtYXV0aG9yZWQiLCJkZXBlbmRlbmN5LXR5cGU6Om1pbm9yIl19-->
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Add conditional array access in l-vals (a C#14 feature)
Example:
In tainting, we simply drop the
?. It is semantically incorrect, but for tainting it does not matter in practical cases, because of the overapproximation. The fix will require a deeper refactoring of AST-to-IL (also left a comment about it in the code).Related PR in the csharp repo: opengrep/semgrep-c-sharp#3