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18 Commits

Author SHA1 Message Date
Eric Fiselier c8efda7f80 [coroutines] Add diagnostics for copy/move assignment operators and functions with deduced return types. 
Summary: The title says it all. Additionally this patch refactors the diagnostic code into a separate function.

Reviewers: GorNishanov, rsmith

Subscribers: majnemer, mehdi_amini, cfe-commits

Differential Revision: https://reviews.llvm.org/D25292

llvm-svn: 285331
 2016-10-27 18:43:28 +00:00
Eric Fiselier 709d1b30ab [coroutines] Build fallthrough and set_exception statements. 
Summary:
This patch adds semantic checking and building of the fall-through `co_return;` statement as well as the `p.set_exception(std::current_exception())` call for handling uncaught exceptions.

The fall-through statement is built and checked according to:
> [dcl.fct.def.coroutine]/4
> The unqualified-ids return_void and return_value are looked up in the scope of class P. If
> both are found, the program is ill-formed. If the unqualified-id return_void is found, flowing
> off the end of a coroutine is equivalent to a co_return with no operand. Otherwise, flowing off
> the end of a coroutine results in undefined behavior.

Similarly the `set_exception` call is only built when that unqualified-id is found in the scope of class P.

Additionally this patch adds fall-through warnings for non-void returning coroutines. Since it's surprising undefined behavior I thought it would be important to add the warning right away. 


Reviewers: majnemer, GorNishanov, rsmith

Subscribers: mehdi_amini, cfe-commits

Differential Revision: https://reviews.llvm.org/D25349

llvm-svn: 285271
 2016-10-27 07:30:31 +00:00
Eric Fiselier 9813131936 [coroutines] Fix co_return statement for initializer list arguments 
Summary:
Previously the statement `co_return {42}` would be transformed into `P.return_void()`, since the type of `{42}` is represented as `void` by Clang.

This patch fixes the bug by checking for `InitListExpr` arguments and transforming them accordingly.

Reviewers: majnemer, GorNishanov, rsmith

Subscribers: mehdi_amini, cfe-commits

Differential Revision: https://reviews.llvm.org/D25296

llvm-svn: 283495
 2016-10-06 21:23:38 +00:00
Gor Nishanov 3e048bb140 [coroutines] Switch to using std::experimental namespace per P0057R5 
Summary:
Look for coroutine_traits and friends in std::experimental namespace.
Patch (mostly) by EricWF.

Reviewers: cfe-commits, EricWF, rsmith

Subscribers: majnemer, mehdi_amini

Differential Revision: https://reviews.llvm.org/D25068

llvm-svn: 283170
 2016-10-04 00:31:16 +00:00
Gor Nishanov 4ffb434ca8 [coroutines] Rename driver flag -fcoroutines to -fcoroutines-ts 
Summary:
Also makes -fcoroutines_ts to be both a Driver and CC1 flag.

Patch mostly by EricWF.

Reviewers: rnk, cfe-commits, rsmith, EricWF

Subscribers: mehdi_amini

Differential Revision: https://reviews.llvm.org/D25130

llvm-svn: 283064
 2016-10-02 03:31:58 +00:00
Eric Fiselier 7d5773e610 [coroutines] Diagnose when 'main' is declared as a coroutine. 
Summary: The title says it all.

Reviewers: rsmith, GorNishanov

Subscribers: mehdi_amini, cfe-commits

Differential Revision: https://reviews.llvm.org/D25078

llvm-svn: 282973
 2016-09-30 22:38:31 +00:00
Eric Fiselier a546528d7b [Coroutines] Fix assertion about uncorrected typos in co_await/co_yield/co_return expressions 
llvm-svn: 282792
 2016-09-29 21:47:39 +00:00
Richard Smith 2af65c4a89 [coroutines] Build a CoroutineBodyStmt when finishing parsing a coroutine, and form the initial_suspend, final_suspend, and get_return_object calls. 
llvm-svn: 253946
 2015-11-24 02:34:39 +00:00
Richard Smith 71d403effb [coroutines] Check for overload sets in co_yield / co_return operands being resolved by a call to yield_value / return_value before rejecting them. 
llvm-svn: 253817
 2015-11-22 07:33:28 +00:00
Richard Smith 4ba66602bd [coroutines] Build implicit return_value / return_void calls for co_return. 
llvm-svn: 253816
 2015-11-22 07:05:16 +00:00
Richard Smith d7bed4d660 [coroutines] Factor out co_await representation into common base class for co_await and co_yield, and use it to hold await_* calls. 
llvm-svn: 253811
 2015-11-22 02:57:17 +00:00
Richard Smith 10610f7f2f [coroutines] Better handling of placeholder types. 
llvm-svn: 253731
 2015-11-20 22:57:24 +00:00
Richard Smith ae3d147c91 [coroutines] Support braced-init-list as operand of co_yield expression. 
llvm-svn: 253726
 2015-11-20 22:47:10 +00:00
Richard Smith 23da82c5ea [coroutines] Synthesize yield_value call for co_yield. 
llvm-svn: 253725
 2015-11-20 22:40:06 +00:00
Richard Smith 744b224bb5 [coroutines] Per latest wording paper, co_* are no longer permitted in any 
unevaluated operands.

llvm-svn: 253641
 2015-11-20 02:54:01 +00:00
Richard Smith 9b2f53e39e [coroutines] Tweak diagnostics to always use fully-qualified name for std::coroutine_traits. 
llvm-svn: 253535
 2015-11-19 02:36:35 +00:00
Richard Smith 9f690bd80b [coroutines] Creation of promise object, lookup of operator co_await, building 
of await_* calls, and AST representation for same.

llvm-svn: 251387
 2015-10-27 06:02:45 +00:00
Richard Smith cfd53b4e99 [coroutines] Initial stub Sema functionality for handling coroutine await / yield / return. 
llvm-svn: 250993
 2015-10-22 06:13:50 +00:00