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* [Concepts] Check function constraints before deducing auto return typeSaar Raz2020-01-311-0/+3
| | | | | | | | | | A constrained function with an auto return type would have it's definition instantiated in order to deduce the auto return type before the constraints are checked. Move the constraints check after the return type deduction. (cherry picked from commit 980517b3530ffb7faa1a23fdc007d78f5b45ae3c)
* [Concept] Fix incorrect check for containsUnexpandedParameterPack in CSESaar Raz2020-01-301-0/+15
| | | | | | | | | | We previously checked for containsUnexpandedParameterPack in CSEs by observing the property in the converted arguments of the CSE. This may not work if the argument is an expanded type-alias that contains a pack-expansion (see added test). Check the as-written arguments when determining containsUnexpandedParameterPack and isInstantiationDependent. (cherry picked from commit c83d9bedc0cc430dc620e7a807daeb985d390325)
* [Concepts] Deprecate -fconcepts-ts, enable Concepts under -std=c++2aSaar Raz2020-01-242-2/+2
| | | | | | | | | Now with concepts support merged and mostly complete, we do not need -fconcepts-ts (which was also misleading as we were not implementing the TS) and can enable concepts features under C++2a. A warning will be generated if users still attempt to use -fconcepts-ts. (cherry picked from commit 67c608a9695496cfc9d3fdf9d0b12b554ac6b4df)
* [Concepts] Function trailing requires clausesSaar Raz2020-01-092-0/+76
| | | | | | Function trailing requires clauses now parsed, supported in overload resolution and when calling, referencing and taking the address of functions or function templates. Differential Revision: https://reviews.llvm.org/D43357
* [Concepts] Constrained partial specializations and function overloads.Saar Raz2019-12-231-5/+10
| | | | | | | Added support for constraint satisfaction checking and partial ordering of constraints in constrained partial specialization and function template overloads. Re-commit after fixing another crash (added regression test). Differential Revision: https://reviews.llvm.org/D41910
* Revert "[Concepts] Constrained partial specializations and function overloads."Reid Kleckner2019-12-221-10/+5
| | | | | | This reverts commit d3f5769d5e93b30d4a8b4696381d5e4a304992fa. Causes crashes on Chromium. Have reproducer, will reduce and send along.
* [Concepts] Constrained partial specializations and function overloads.Saar Raz2019-12-221-5/+10
| | | | | | | Added support for constraint satisfaction checking and partial ordering of constraints in constrained partial specialization and function template overloads. Re-commit after fixing some crashes and warnings. Differential Revision: https://reviews.llvm.org/D41910
* Revert concepts changes from D41910Vedant Kumar2019-12-181-10/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | These changes caused LibcxxVariantDataFormatterTestCase in lldb to fail with an assert: Assertion failed: (Idx < size() && "Out-of-bounds Bit access."), function operator[], file /Users/buildslave/jenkins/workspace/lldb-cmake/llvm-project/llvm/include/llvm/ADT/SmallBitVector.h, line 452. In: 7 clang-10 0x00000001094b79d9 isAtLeastAsSpecializedAs(clang::Sema&, clang::SourceLocation, clang::FunctionTemplateDecl*, clang::FunctionTemplateDecl*, clang::TemplatePartialOrderingContext, unsigned int) + 1865 8 clang-10 0x00000001094b7111 clang::Sema::getMoreSpecializedTemplate(clang::FunctionTemplateDecl*, clang::FunctionTemplateDecl*, clang::SourceLocation, clang::TemplatePartialOrderingContext, unsigned int, unsigned int) + 97 9 clang-10 0x000000010939bf88 clang::isBetterOverloadCandidate(clang::Sema&, clang::OverloadCandidate const&, clang::OverloadCandidate const&, clang::SourceLocation, clang::OverloadCandidateSet::CandidateSetKind) + 1128 Revert "[Concepts] Fix incorrect move out of temporary in D41910" This reverts commit 11d5fa6e87e3584f72056ecc2b17f88c58323dde. Revert "[Concepts] Fix crash in D41910" This reverts commit 12038be20ee6a903cdbd3fddce65535ef683e31d. Revert "[Concepts] Constrained partial specializations and function overloads." This reverts commit fc0731b98a67c793862288f8ae334322666214dc.
* [Concepts] Constrained partial specializations and function overloads.Saar Raz2019-12-181-5/+10
| | | | | | Added support for constraint satisfaction checking and partial ordering of constraints in constrained partial specialization and function template overloads. Phabricator: D41910
* [Concepts] Constraint Enforcement & DiagnosticsSaar Raz2019-12-061-0/+31
| | | | | | | | | Part of the C++20 concepts implementation effort. - Associated constraints (requires clauses, currently) are now enforced when instantiating/specializing templates and when considering partial specializations and function overloads. - Elaborated diagnostics give helpful insight as to why the constraints were not satisfied. Phabricator: D41569 Re-commit, after fixing some memory bugs.
* Revert "[Concepts] Constraint Enforcement & Diagnostics"Vlad Tsyrklevich2019-10-281-31/+0
| | | | | This reverts commit ffa214ef22892d75340dc6720271863901dc2c90, it was causing ASAN test failures on sanitizer-x86_64-linux-bootstrap.
* [Concepts] Constraint Enforcement & DiagnosticsSaar Raz2019-10-251-0/+31
| | | | | | Part of the C++20 concepts implementation effort. - Associated constraints (requires clauses, currently) are now enforced when instantiating/specializing templates and when considering partial specializations and function overloads. - Elaborated diagnostics give helpful insight as to why the constraints were not satisfied. Phabricator: D41569
* [Concepts] Concept Specialization ExpressionsSaar Raz2019-10-151-0/+149
| | | | | | | | | | Part of C++20 Concepts implementation effort. Added Concept Specialization Expressions that are created when a concept is refe$ D41217 on Phabricator. (recommit after fixing failing Parser test on windows) llvm-svn: 374903
* Revert 374882 "[Concepts] Concept Specialization Expressions"Nico Weber2019-10-151-149/+0
| | | | | | | | | | This reverts commit ec87b003823d63f3342cf648f55a134c1522e612. The test fails on Windows, see e.g. http://lab.llvm.org:8011/builders/clang-x64-windows-msvc/builds/11533/steps/stage%201%20check/logs/stdio Also revert follow-up r374893. llvm-svn: 374899
* [Concepts] Concept Specialization ExpressionsSaar Raz2019-10-151-0/+149
Part of C++20 Concepts implementation effort. Added Concept Specialization Expressions that are created when a concept is referenced with arguments, and tests thereof. llvm-svn: 374882
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