| 0e2c34f92f00628d48968dfea096d36381f494cb |
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23-Mar-2015 |
Stephen Hines <srhines@google.com> |
Update aosp/master clang for rebase to r230699.
Change-Id: I6a546ab3d4ae37119eebb735e102cca4f80ab520
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| fad9e13f3cb85198f0ee5af620ba81cd78574faa |
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26-Sep-2013 |
Faisal Vali <faisalv@yahoo.com> |
Implement a rudimentary form of generic lambdas.
Specifically, the following features are not included in this commit:
- any sort of capturing within generic lambdas
- generic lambdas within template functions and nested
within other generic lambdas
- conversion operator for captureless lambdas
- ensuring all visitors are generic lambda aware
(Although I have gotten some useful feedback on my patches of the above and will be incorporating that as I submit those patches for commit)
As an example of what compiles through this commit:
template <class F1, class F2>
struct overload : F1, F2 {
using F1::operator();
using F2::operator();
overload(F1 f1, F2 f2) : F1(f1), F2(f2) { }
};
auto Recursive = [](auto Self, auto h, auto ... rest) {
return 1 + Self(Self, rest...);
};
auto Base = [](auto Self, auto h) {
return 1;
};
overload<decltype(Base), decltype(Recursive)> O(Base, Recursive);
int num_params = O(O, 5, 3, "abc", 3.14, 'a');
Please see attached tests for more examples.
This patch has been reviewed by Doug and Richard. Minor changes (non-functionality affecting) have been made since both of them formally looked at it, but the changes involve removal of supernumerary return type deduction changes (since they are now redundant, with richard having committed a recent patch to address return type deduction for C++11 lambdas using C++14 semantics).
Some implementation notes:
- Add a new Declarator context => LambdaExprParameterContext to
clang::Declarator to allow the use of 'auto' in declaring generic
lambda parameters
- Add various helpers to CXXRecordDecl to facilitate identifying
and querying a closure class
- LambdaScopeInfo (which maintains the current lambda's Sema state)
was augmented to house the current depth of the template being
parsed (id est the Parser calls Sema::RecordParsingTemplateParameterDepth)
so that SemaType.cpp::ConvertDeclSpecToType may use it to immediately
generate a template-parameter-type when 'auto' is parsed in a generic
lambda parameter context. (i.e we do NOT use AutoType deduced to
a template parameter type - Richard seemed ok with this approach).
We encode that this template type was generated from an auto by simply
adding $auto to the name which can be used for better diagnostics if needed.
- SemaLambda.h was added to hold some common lambda utility
functions (this file is likely to grow ...)
- Teach Sema::ActOnStartOfFunctionDef to check whether it
is being called to instantiate a generic lambda's call
operator, and if so, push an appropriately prepared
LambdaScopeInfo object on the stack.
- various tests were added - but much more will be needed.
There is obviously more work to be done, and both Richard (weakly) and Doug (strongly)
have requested that LambdaExpr be removed form the CXXRecordDecl LambdaDefinitionaData
in a future patch which is forthcoming.
A greatful thanks to all reviewers including Eli Friedman, James Dennett,
and especially the two gracious wizards (Richard Smith and Doug Gregor)
who spent hours providing feedback (in person in Chicago and on the mailing lists).
And yet I am certain that I have allowed unidentified bugs to creep in; bugs, that I will do my best to slay, once identified!
Thanks!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191453 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| 152b4e4652baedfceba1cd8115515629225e713f |
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22-Aug-2013 |
Manuel Klimek <klimek@google.com> |
Revert "Implement a rudimentary form of generic lambdas."
This reverts commit 606f5d7a99b11957e057e4cd1f55f931f66a42c7.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189004 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| ecb5819a9e64fb654d46a3b270a286cc570c58ff |
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22-Aug-2013 |
Faisal Vali <faisalv@yahoo.com> |
Implement a rudimentary form of generic lambdas.
Specifically, the following features are not included in this commit:
- any sort of capturing within generic lambdas
- nested lambdas
- conversion operator for captureless lambdas
- ensuring all visitors are generic lambda aware
As an example of what compiles:
template <class F1, class F2>
struct overload : F1, F2 {
using F1::operator();
using F2::operator();
overload(F1 f1, F2 f2) : F1(f1), F2(f2) { }
};
auto Recursive = [](auto Self, auto h, auto ... rest) {
return 1 + Self(Self, rest...);
};
auto Base = [](auto Self, auto h) {
return 1;
};
overload<decltype(Base), decltype(Recursive)> O(Base, Recursive);
int num_params = O(O, 5, 3, "abc", 3.14, 'a');
Please see attached tests for more examples.
Some implementation notes:
- Add a new Declarator context => LambdaExprParameterContext to
clang::Declarator to allow the use of 'auto' in declaring generic
lambda parameters
- Augment AutoType's constructor (similar to how variadic
template-type-parameters ala TemplateTypeParmDecl are implemented) to
accept an IsParameterPack to encode a generic lambda parameter pack.
- Add various helpers to CXXRecordDecl to facilitate identifying
and querying a closure class
- LambdaScopeInfo (which maintains the current lambda's Sema state)
was augmented to house the current depth of the template being
parsed (id est the Parser calls Sema::RecordParsingTemplateParameterDepth)
so that Sema::ActOnLambdaAutoParameter may use it to create the
appropriate list of corresponding TemplateTypeParmDecl for each
auto parameter identified within the generic lambda (also stored
within the current LambdaScopeInfo). Additionally,
a TemplateParameterList data-member was added to hold the invented
TemplateParameterList AST node which will be much more useful
once we teach TreeTransform how to transform generic lambdas.
- SemaLambda.h was added to hold some common lambda utility
functions (this file is likely to grow ...)
- Teach Sema::ActOnStartOfFunctionDef to check whether it
is being called to instantiate a generic lambda's call
operator, and if so, push an appropriately prepared
LambdaScopeInfo object on the stack.
- Teach Sema::ActOnStartOfLambdaDefinition to set the
return type of a lambda without a trailing return type
to 'auto' in C++1y mode, and teach the return type
deduction machinery in SemaStmt.cpp to process either
C++11 and C++14 lambda's correctly depending on the flag.
- various tests were added - but much more will be needed.
A greatful thanks to all reviewers including Eli Friedman,
James Dennett and the ever illuminating Richard Smith. And
yet I am certain that I have allowed unidentified bugs to creep in;
bugs, that I will do my best to slay, once identified!
Thanks!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188977 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| 14d937afc2ad8f65dccbafeb62271e80dbd46a78 |
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27-Jul-2013 |
Richard Smith <richard-llvm@metafoo.co.uk> |
Handle a difference in lambda return type deduction between C++11 and C++1y: if
no return type is specified, C++11 will deduce a cv-qualified return type in
some cases, but C++1y never will.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187275 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| f45c2992a3aac7591310cd824b7c7319afd432fc |
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12-May-2013 |
Richard Smith <richard-llvm@metafoo.co.uk> |
C++1y: provide full 'auto' return type deduction for lambda expressions. This
completes the implementation of N3638.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181669 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| 287698336ff9f9315bf814943068d6b8261e517d |
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04-Jun-2012 |
Aaron Ballman <aaron@aaronballman.com> |
Fixes some test cases that should have come along with r157943.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157947 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| 4e88df72e690498aeba2dc3d5089388b27be66fa |
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15-Feb-2012 |
Douglas Gregor <dgregor@apple.com> |
Specialize the diagnostic complaining about conflicting types of
return statements within a lambda; this diagnostic previously referred
to blocks.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150584 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| 53393f23d8b767f976427a6d45b310bf37dd91c4 |
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14-Feb-2012 |
Douglas Gregor <dgregor@apple.com> |
Check the return type of lambda expressions.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150503 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| a0c2b21e0d84ad289781e08e14148da6b8b8b76d |
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09-Feb-2012 |
Douglas Gregor <dgregor@apple.com> |
Don't allow deduction of a lambda result type from an initializer
list; it is not an expression.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150194 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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| 54042f1bd78f1f1ea86be7d4af541462e127d2ed |
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09-Feb-2012 |
Douglas Gregor <dgregor@apple.com> |
Implement return type deduction for lambdas per C++11
[expr.prim.lambda]p4, including the current suggested resolution of
core isue 975, which allows multiple return statements so long as the
types match. ExtWarn when user code is actually making use of this
extension.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150168 91177308-0d34-0410-b5e6-96231b3b80d8
/external/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p4.cpp
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