Commit Graph

692 Commits

Author SHA1 Message Date
Sam McCall 128ce70eef [CodeCompletion] Avoid spurious signature help for init-list args
Somewhat surprisingly, signature help is emitted as a side-effect of
computing the expected type of a function argument.
The reason is that both actions require enumerating the possible
function signatures and running partial overload resolution, and doing
this twice would be wasteful and complicated.

Change #1: document this, it's subtle :-)

However, sometimes we need to compute the expected type without having
reached the code completion cursor yet - in particular to allow
completion of designators.
eb4ab3358c did this but introduced a
regression - it emits signature help in the wrong location as a side-effect.

Change #2: only emit signature help if the code completion cursor was reached.

Currently there is PP.isCodeCompletionReached(), but we can't use it
because it's set *after* running code completion.
It'd be nice to set this implicitly when the completion token is lexed,
but ConsumeCodeCompletionToken() makes this complicated.

Change #3: call cutOffParsing() *first* when seeing a completion token.

After this, the fact that the Sema::Produce*SignatureHelp() functions
are even more confusing, as they only sometimes do that.
I don't want to rename them in this patch as it's another large
mechanical change, but we should soon.

Change #4: prepare to rename ProduceSignatureHelp() to GuessArgumentType() etc.

Differential Revision: https://reviews.llvm.org/D98488
2021-03-16 12:46:40 +01:00
Sam McCall a92693dac4 [CodeCompletion] Don't track preferred types if code completion is disabled.
Some of this work isn't quite trivial.

(As requested in D96058)

Differential Revision: https://reviews.llvm.org/D98459
2021-03-16 12:16:10 +01:00
Kadir Cetinkaya f10137399a
[clang][CodeComplete] Ensure there are no crashes when completing with ParenListExprs as LHS
Differential Revision: https://reviews.llvm.org/D96950
2021-02-22 10:01:22 +01:00
Sam McCall 5c55d3747b [CodeComplete] Member completion: heuristically resolve some dependent base exprs
Today, inside a template, you can get completion for:

Foo<T> t;
t.^

t has dependent type Foo<T>, and we use the primary template to find its members.
However we also want this to work:

t.foo.bar().^

The type of t.foo.bar() is DependentTy, so we attempt to resolve using similar
heuristics (e.g. primary template).

Differential Revision: https://reviews.llvm.org/D96376
2021-02-11 11:03:40 +01:00
Kadir Cetinkaya f743184911
[clang][CodeComplete] Fix crash on ParenListExprs
Fixes https://github.com/clangd/clangd/issues/676.

Differential Revision: https://reviews.llvm.org/D95935
2021-02-08 13:16:49 +01:00
Sam McCall eb4ab3358c [CodeComplete] Guess type for designated initializers
This enables:
 - completion in { .x.^ }
 - completion in { .x = { .^ } }
 - type-based ranking of candidates for { .x = ^ }

Differential Revision: https://reviews.llvm.org/D96058
2021-02-04 22:14:49 +01:00
Adam Czachorowski 00054382b9 [clangd] Fix a crash when indexing invalid ObjC method declaration
This fix will make us not crash, but ideally we would handle this case
better.

Differential Revision: https://reviews.llvm.org/D94919
2021-01-25 15:43:11 +01:00
Nathan James d18c3c7b18
[CodeComplete] Add ranged for loops code pattern.
Add code pattersn for c++ `range for` loops and objective c `for...in` loops.

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D95131
2021-01-22 23:40:35 +00:00
Erik Pilkington 9cd2413f1c [clang] Add a new nullability annotation for swift async: _Nullable_result
_Nullable_result generally like _Nullable, except when being imported into a
swift async method. rdar://70106409

Differential revision: https://reviews.llvm.org/D92495
2020-12-07 17:19:20 -05:00
Thorsten 7c6412e0cc Convert TypeSpecifierSign from Specifiers.h to a scoped enum; NFC 2020-11-16 09:08:08 -05:00
Faisal Vali e4d27932a5 [NFC, Refactor] Rename the (scoped) enum DeclaratorContext's enumerators to remove duplication
Since these are scoped enumerators, they have to be prefixed by DeclaratorContext, so lets remove Context from the name, and return some characters to the multiverse.

Patch was reviewed here: https://reviews.llvm.org/D91011

Thank you to aaron, bruno, wyatt and barry for indulging me.
2020-11-10 23:40:12 -06:00
Kadir Cetinkaya 53c593c2c8
[clang] Make signature help work with dependent args
Fixes https://github.com/clangd/clangd/issues/490

Differential Revision: https://reviews.llvm.org/D85826
2020-08-17 10:06:36 +02:00
lh123 83fae3f762 [CodeComplete] Add code completion after function equals
Summary:
Provide `default` and `delete` completion after the function equals.

Reviewers: kadircet, sammccall

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82548
2020-07-01 12:51:25 +08:00
Nathan James 8ba4867c27
[CodeComplete] Tweak completion for else.
If an `if` statement uses braces for its `then` block, suggest braces for the `else` and `else if` completion blocks, Otherwise don't suggest them.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D82626
2020-06-30 16:48:24 +01:00
Kadir Cetinkaya 5547a83c0b
[CodeComplete] Add code completion for using alias.
Add code completion for using alias.

Patch By @lh123 !

Reviewers: kadircet

Differential Revision: https://reviews.llvm.org/D82535
2020-06-26 15:55:45 +02:00
Kadir Cetinkaya 834c71829c
[CodeComplete] Tweak code completion for `typename`.
Summary:
Currently, clangd always completes `typename` as `typename qualifier::name`, I think the current behavior is not useful when the code completion is triggered in `template <>`. So I tweak it to `typename identifier`.

Patch by @lh123 !

Reviewers: sammccall, kadircet

Reviewed By: kadircet

Subscribers: ilya-biryukov, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82373
2020-06-26 10:32:12 +02:00
David Goldman c61ef1f25c [Sema][CodeComplete][ObjC] Don't split the first selector fragment
Summary:
Standardize the formatting of selector fragments to include the ':',
e.g. for `- (void)foobar:(int)foobar;`, report `{foobar:}` instead of
`{foobar}{:}`. This was normally the case except for a couple of places
where it was split.

This also improves integration with clangd since it relies upon the `:`
to identify ObjC selectors.

NOTE: It is possible to have selector fragments that are just `:` with
no text, we now handle this properly for the first fragment.

Reviewers: sammccall, doug.gregor

Subscribers: ilya-biryukov, dexonsmith, arphaman, kadircet, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82306
2020-06-25 13:58:27 -04:00
David Goldman 2ef65adb6f [Sema][CodeComplete][ObjC] Don't include arrow/dot fixits
Summary:
Exempt ObjC from arrow/dot fixits since this has limited value for
Objective-C, where properties (referenced by dot syntax) are normally
backed by ivars (referenced by arrow syntax).

In addition, the current implementation doesn't properly mark
the fix it condition for Objective-C.

This was initially added in https://reviews.llvm.org/D41537
for C++ and then later C, don't believe the Objective-C changes
were intentional.

Reviewers: sammccall, yvvan

Subscribers: jfb, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D81263
2020-06-08 12:46:00 -04:00
Puyan Lotfi 9721fbf85b [NFC] Refactoring PropertyAttributeKind for ObjCPropertyDecl and ObjCDeclSpec.
This is a code clean up of the PropertyAttributeKind and
ObjCPropertyAttributeKind enums in ObjCPropertyDecl and ObjCDeclSpec that are
exactly identical. This non-functional change consolidates these enums
into one. The changes are to many files across clang (and comments in LLVM) so
that everything refers to the new consolidated enum in DeclObjCCommon.h.

2nd Landing Attempt...

Differential Revision: https://reviews.llvm.org/D77233
2020-04-23 17:21:25 -04:00
Puyan Lotfi bbf386f02b Revert "[NFC] Refactoring PropertyAttributeKind for ObjCPropertyDecl and ObjCDeclSpec."
This reverts commit 2aa044ed08.

Reverting due to bot failure in lldb.
2020-04-23 00:05:08 -04:00
Puyan Lotfi 2aa044ed08 [NFC] Refactoring PropertyAttributeKind for ObjCPropertyDecl and ObjCDeclSpec.
This is a code clean up of the PropertyAttributeKind and
ObjCPropertyAttributeKind enums in ObjCPropertyDecl and ObjCDeclSpec that are
exactly identical. This non-functional change consolidates these enums
into one. The changes are to many files across clang (and comments in LLVM) so
that everything refers to the new consolidated enum in DeclObjCCommon.h.

Differential Revision: https://reviews.llvm.org/D77233
2020-04-22 23:27:06 -04:00
Sam McCall a76e68c970 [CodeComplete] Member completion for concept-constrained types.
Summary:
The basic idea is to walk through the concept definition, looking for
t.foo() where t has the constrained type.

In this patch:
 - nested types are recognized and offered after ::
 - variable/function members are recognized and offered after the correct
   dot/arrow/colon trigger
 - member functions are recognized (anything directly called). parameter
   types are presumed to be the argument types. parameters are unnamed.
 - result types are available when a requirement has a type constraint.
   These are printed as constraints, except same_as<T> which prints as T.

Not in this patch:
 - support for merging/overloading when two locations describe the same member.
   The last one wins, for any given name. This is probably important...
 - support for nested template members (T::x<int>)
 - support for completing members of (instantiations of) template template parameters

Reviewers: nridge, saar.raz

Subscribers: mgrang, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D73649
2020-03-31 18:43:24 +02:00
David Goldman f50fe5eb6d [Sema][CodeComplete] Handle symlinks for include code completion
Summary:
Previously any symlinks would be ignored since the directory
traversal doesn't follow them.

With this change we now follow symlinks (via a `stat` call
in order to figure out the target type of the symlink if it
is valid).

Reviewers: sammccall

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D74790
2020-02-19 11:45:58 -05:00
Benjamin Kramer adcd026838 Make llvm::StringRef to std::string conversions explicit.
This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.

This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.

This doesn't actually modify StringRef yet, I'll do that in a follow-up.
2020-01-28 23:25:25 +01:00
Kadir Cetinkaya 42e9478e0b
[clang][CodeComplete] Support for designated initializers
Reviewers: sammccall

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D73271
2020-01-28 16:34:15 +01:00
Kadir Cetinkaya 1f946ee2fa
[clang][CodeComplete] Propogate printing policy to FunctionDecl
Summary:
Printing policy was not propogated to functiondecls when creating a
completion string which resulted in canonical template parameters like
`foo<type-parameter-0-0>`. This patch propogates printing policy to those as
well.

Fixes https://github.com/clangd/clangd/issues/76

Reviewers: ilya-biryukov

Subscribers: jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D72715
2020-01-20 12:20:20 +01:00
Saar Raz ff1e0fce81 [Concepts] Type Constraints
Add support for type-constraints in template type parameters.
Also add support for template type parameters as pack expansions (where the type constraint can now contain an unexpanded parameter pack).

Differential Revision: https://reviews.llvm.org/D44352
2020-01-15 04:02:39 +02:00
Simon Pilgrim bf03944d5d Fix "pointer is null" static analyzer warnings. NFCI.
Use castAs<> instead of getAs<> since the pointers are dereferenced immediately and castAs will perform the null assertion for us.
2020-01-11 16:02:24 +00:00
Ilya Biryukov 57a51b689e [CodeComplete] Suggest 'return nullptr' in functions returning pointers
Reviewers: kadircet

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D72497
2020-01-10 13:28:13 +01:00
Mark de Wever 3ec6128dae [Sema] Fixes -Wrange-loop-analysis warnings
This avoids new warnings due to D68912 adds -Wrange-loop-analysis to -Wall.

Differential Revision: https://reviews.llvm.org/D71529
2019-12-17 21:54:32 +01:00
Kirill Bobyrev 7f0dcf665d
[clangd] Show lambda signature for lambda autocompletions
The original bug report can be found
[here](https://github.com/clangd/clangd/issues/85)

Given the following code:

```c++
void function() {
  auto Lambda = [](int a, double &b) {return 1.f;};
  La^
}
```

Triggering the completion at `^` would show `(lambda)` before this patch
and would show signature `(int a, double &b) const`, build a snippet etc
with this patch.

Reviewers: sammccall

Reviewed by: sammccall

Differential revision: https://reviews.llvm.org/D70445
2019-11-22 12:48:06 +01:00
Vedant Kumar 568db780bb [CGDebugInfo] Emit subprograms for decls when AT_tail_call is understood (reland with fixes)
Currently, clang emits subprograms for declared functions when the
target debugger or DWARF standard is known to support entry values
(DW_OP_entry_value & the GNU equivalent).

Treat DW_AT_tail_call the same way to allow debuggers to follow cross-TU
tail calls.

Pre-patch debug session with a cross-TU tail call:

```
  * frame #0: 0x0000000100000fa4 main`target at b.c:4:3 [opt]
    frame #1: 0x0000000100000f99 main`main at a.c:8:10 [opt]
```

Post-patch (note that the tail-calling frame, "helper", is visible):

```
  * frame #0: 0x0000000100000fa4 main`target at b.c:4:3 [opt]
    frame #1: 0x0000000100000f80 main`helper [opt] [artificial]
    frame #2: 0x0000000100000f99 main`main at a.c:8:10 [opt]
```

This was reverted in 5b9a072c because it attached declaration
subprograms to inlinable builtin calls, which interacted badly with the
MergeICmps pass. The fix is to not attach declarations to builtins.

rdar://46577651

Differential Revision: https://reviews.llvm.org/D69743
2019-11-19 12:49:27 -08:00
Sam McCall fa3b87fbeb [CodeComplete] Constructor overload candidates report as vector(int) instead of vector<string>(int)
Summary:
This is shorter, shouldn't be confusing (is consistent with how they're declared),
and avoids messy cases that are printed as myclass<type-param-0-0>(int) in the
case of partial specialization.

Fixes part of https://github.com/clangd/clangd/issues/76

Reviewers: hokein, lh123

Subscribers: ilya-biryukov, kadircet, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D70307
2019-11-15 15:42:18 +01:00
Ilya Biryukov d9971d0b2e [clangd] Do not insert parentheses when completing a using declaration
Summary:
Would be nice to also fix this in clang, but that looks like more work
if we want to preserve signatures in informative chunks.

Fixes https://github.com/clangd/clangd/issues/118

Reviewers: kadircet

Reviewed By: kadircet

Subscribers: merge_guards_bot, MaskRay, jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D69382
2019-10-28 09:45:10 +01:00
Ilya Biryukov 8613e90ba7 [CodeComplete] Ensure object is the same in compareOverloads()
Summary:
This fixes a regression that led to size() not being available in clangd
when completing 'deque().^' and using libc++.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: jkorous, arphaman, kadircet, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D68335

llvm-svn: 373710
2019-10-04 08:10:27 +00:00
Sam McCall 36082e397d [CodeComplete] Fix ASTUnit cached completion of macros from preamble, broken in r342528
Summary:
The problem is the default LoadExternal with no completer, which happens when
loading global results.

Reviewers: ilya-biryukov, nik

Subscribers: arphaman, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64864

llvm-svn: 366409
2019-07-18 07:17:49 +00:00
Rui Ueyama 49a3ad21d6 Fix parameter name comments using clang-tidy. NFC.
This patch applies clang-tidy's bugprone-argument-comment tool
to LLVM, clang and lld source trees. Here is how I created this
patch:

$ git clone https://github.com/llvm/llvm-project.git
$ cd llvm-project
$ mkdir build
$ cd build
$ cmake -GNinja -DCMAKE_BUILD_TYPE=Debug \
    -DLLVM_ENABLE_PROJECTS='clang;lld;clang-tools-extra' \
    -DCMAKE_EXPORT_COMPILE_COMMANDS=On -DLLVM_ENABLE_LLD=On \
    -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../llvm
$ ninja
$ parallel clang-tidy -checks='-*,bugprone-argument-comment' \
    -config='{CheckOptions: [{key: StrictMode, value: 1}]}' -fix \
    ::: ../llvm/lib/**/*.{cpp,h} ../clang/lib/**/*.{cpp,h} ../lld/**/*.{cpp,h}

llvm-svn: 366177
2019-07-16 04:46:31 +00:00
Richard Smith 7fa2b74e98 Use getOperatorSpelling to get the spelling of an overloaded operator
rather than duplicating operator name tables in multiple places.

llvm-svn: 363446
2019-06-14 20:01:51 +00:00
Sam McCall 3dea527258 Re-land "[CodeComplete] Improve overload handling for C++ qualified and ref-qualified methods."
ShadowMapEntry is now really, truly a normal class.

llvm-svn: 362950
2019-06-10 15:17:52 +00:00
Sam McCall 306e474b91 Revert "[CodeComplete] Improve overload handling for C++ qualified and ref-qualified methods."
This reverts commit r362924, which causes a double-free of ShadowMapEntry.

llvm-svn: 362944
2019-06-10 14:55:57 +00:00
Sam McCall 94600e466c Revert "Revert "[CodeComplete] Improve overload handling for C++ qualified and ref-qualified methods.""
This reverts commit r362830, and relands r362785 with the leak fixed.

llvm-svn: 362924
2019-06-10 09:52:09 +00:00
Vlad Tsyrklevich a6283b06fe Revert "[CodeComplete] Improve overload handling for C++ qualified and ref-qualified methods."
This reverts commit f1f6e0fc24, it was
causing LSan failures on the sanitizer bots:
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/32809

llvm-svn: 362830
2019-06-07 19:18:30 +00:00
Sam McCall f1f6e0fc24 [CodeComplete] Improve overload handling for C++ qualified and ref-qualified methods.
Summary:
- when a method is not available because of the target value kind (e.g. an &&
  method on a Foo& variable), then don't offer it.
- when a method is effectively shadowed by another method from the same class
  with a) an identical argument list and b) superior qualifiers, then don't
  offer it.

Reviewers: ilya-biryukov

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62582

llvm-svn: 362785
2019-06-07 09:45:17 +00:00
Ilya Biryukov 30977fc3a9 [CodeComplete] Include more text into typed chunks of pattern completions
Summary:
To allow filtering on any of the words in the editors.
In particular, the following completions were changed:
    - 'using namespace <#name#>'
      Typed text before: 'using', after: 'using namespace'.
    - 'else if (#<condition#>)'
      Before: 'else', after: 'else if'.
    - 'using typename <#qualifier#>::<#name#>'
      Before: 'using', after: 'using typename'.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62615

llvm-svn: 362479
2019-06-04 09:26:08 +00:00
Ilya Biryukov 1a44584588 [CodeComplete] Add a bit more whitespace to completed patterns
Summary:
E.g. we now turn `while(<#cond#>){` into `while (<#cond#>) {`

This slightly improves the final output. Should not affect clients that
format the result on their own.

Reviewers: gribozavr

Reviewed By: gribozavr

Subscribers: jkorous, arphaman, kadircet, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62616

llvm-svn: 362363
2019-06-03 08:34:25 +00:00
Ilya Biryukov 2fa3188075 [CodeComplete] Add semicolon when completing patterns for 'static_assert' and 'typedef
This is a trivial follow-up to r360042, which added semicolons to other
pattern completions, so sending without review.

llvm-svn: 361974
2019-05-29 15:32:17 +00:00
Ilya Biryukov b1296faee0 [CodeComplete] Set preferred type for qualified-id
Reviewers: kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62514

llvm-svn: 361838
2019-05-28 15:21:03 +00:00
Ilya Biryukov 49e432d030 [CodeComplete] Consistently break after '{' in multi-line patterns
Summary:
Completion can return multi-line patterns in some cases, e.g.

    for (<#init#>; <#cond#>; <#inc#>) {
    <#body#>
    }

However, most patterns break the line only before closing brace,
resulting in code like:

    namespace <#name#> { <#decls#>
    }

While some (e.g. the 'for' example above) are breaking lines after the
opening brace too.

This change ensures all patterns consistently break after the opening
brace, this leads to nicer UX when using those in an actual editor.

Reviewers: gribozavr

Reviewed By: gribozavr

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62405

llvm-svn: 361829
2019-05-28 14:33:16 +00:00
Ilya Biryukov 32497f57df [CodeComplete] Complete 'return true/false' in boolean functions
Reviewers: kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62391

llvm-svn: 361753
2019-05-27 09:52:09 +00:00
Ilya Biryukov 47fd4f06c5 [CodeComplete] Add whitespace around braces in lambda completions
This produces nicer output.
Trivial follow-up to r361461, so sending without review.

llvm-svn: 361645
2019-05-24 16:16:15 +00:00
Ilya Biryukov cabab29af2 [CodeComplete] Filter override completions by function name
Summary:
We put only part of the signature starting with a function name into "typed text"
chunks now, previously the whole signature was "typed text".

This leads to meaningful fuzzy match scores, giving better signals to
compare with other completion items.

Ideally, we would not display the result type to the user, but that requires adding
a new kind of completion chunk.

Reviewers: kadircet

Reviewed By: kadircet

Subscribers: jkorous, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62298

llvm-svn: 361623
2019-05-24 10:18:39 +00:00
Ilya Biryukov fd11a5f47d [CodeComplete] Only show lambda completions if patterns are requested
This is a trivial follow-up to r361461, so sending without review.

llvm-svn: 361510
2019-05-23 16:39:26 +00:00
Ilya Biryukov 3a2f0e466b [CodeComplete] Complete a lambda when preferred type is a function
Summary: Uses a heuristic to detect std::function and friends.

Reviewers: kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62238

llvm-svn: 361461
2019-05-23 07:45:35 +00:00
Ilya Biryukov 600ec01b7e [CodeComplete] Complete enumerators when preferred type is an enum
Reviewers: kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D62010

llvm-svn: 360912
2019-05-16 16:06:57 +00:00
Richard Smith 76b9027f35 [c++20] Add support for explicit(bool), as described in P0892R2.
Patch by Tyker!

Differential Revision: https://reviews.llvm.org/D60934

llvm-svn: 360311
2019-05-09 03:59:21 +00:00
Ilya Biryukov 15a37ebb18 [CodeComplete] Add a trailing semicolons to some pattern completions
Summary:
Where semicolon is required in any case. Here's a list of completions
that now have a semicolon:
  - namespace <name> = <target>;
  - using namespace <name>;
  - using <qualifier>::<name>;
  - continue;
  - break;
  - goto <label>;
  - return;
  - return <expression>;

Reviewers: gribozavr

Reviewed By: gribozavr

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D61589

llvm-svn: 360042
2019-05-06 13:18:00 +00:00
Hans Wennborg d2b9fc88c8 Revert r359949 "[clang] adding explicit(bool) from c++2a"
This caused Clang to start erroring on the following:

  struct S {
    template <typename = int> explicit S();
  };

  struct T : S {};

  struct U : T {
    U();
  };
  U::U() {}

  $ clang -c /tmp/x.cc
  /tmp/x.cc:10:4: error: call to implicitly-deleted default constructor of 'T'
  U::U() {}
     ^
  /tmp/x.cc:5:12: note: default constructor of 'T' is implicitly deleted
    because base class 'S' has no default constructor
  struct T : S {};
             ^
  1 error generated.

See discussion on the cfe-commits email thread.

This also reverts the follow-ups r359966 and r359968.

> this patch adds support for the explicit bool specifier.
>
> Changes:
> - The parsing for the explicit(bool) specifier was added in ParseDecl.cpp.
> - The storage of the explicit specifier was changed. the explicit specifier was stored as a boolean value in the FunctionDeclBitfields and in the DeclSpec class. now it is stored as a PointerIntPair<Expr*, 2> with a flag and a potential expression in CXXConstructorDecl, CXXDeductionGuideDecl, CXXConversionDecl and in the DeclSpec class.
> - Following the AST change, Serialization, ASTMatchers, ASTComparator and ASTPrinter were adapted.
> - Template instantiation was adapted to instantiate the potential expressions of the explicit(bool) specifier When instantiating their associated declaration.
> - The Add*Candidate functions were adapted, they now take a Boolean indicating if the context allowing explicit constructor or conversion function and this boolean is used to remove invalid overloads that required template instantiation to be detected.
> - Test for Semantic and Serialization were added.
>
> This patch is not yet complete. I still need to check that interaction with CTAD and deduction guides is correct. and add more tests for AST operations. But I wanted first feedback.
> Perhaps this patch should be spited in smaller patches, but making each patch testable as a standalone may be tricky.
>
> Patch by Tyker
>
> Differential Revision: https://reviews.llvm.org/D60934

llvm-svn: 360024
2019-05-06 09:51:10 +00:00
Nicolas Lesser 5fe2ddbdf4 [clang] adding explicit(bool) from c++2a
this patch adds support for the explicit bool specifier.

Changes:
- The parsing for the explicit(bool) specifier was added in ParseDecl.cpp.
- The storage of the explicit specifier was changed. the explicit specifier was stored as a boolean value in the FunctionDeclBitfields and in the DeclSpec class. now it is stored as a PointerIntPair<Expr*, 2> with a flag and a potential expression in CXXConstructorDecl, CXXDeductionGuideDecl, CXXConversionDecl and in the DeclSpec class.
- Following the AST change, Serialization, ASTMatchers, ASTComparator and ASTPrinter were adapted.
- Template instantiation was adapted to instantiate the potential expressions of the explicit(bool) specifier When instantiating their associated declaration.
- The Add*Candidate functions were adapted, they now take a Boolean indicating if the context allowing explicit constructor or conversion function and this boolean is used to remove invalid overloads that required template instantiation to be detected.
- Test for Semantic and Serialization were added.

This patch is not yet complete. I still need to check that interaction with CTAD and deduction guides is correct. and add more tests for AST operations. But I wanted first feedback.
Perhaps this patch should be spited in smaller patches, but making each patch testable as a standalone may be tricky.

Patch by Tyker

Differential Revision: https://reviews.llvm.org/D60934

llvm-svn: 359949
2019-05-04 00:09:00 +00:00
Fangrui Song 899d13926d Use llvm::stable_sort
llvm-svn: 359098
2019-04-24 14:43:05 +00:00
Sam McCall bc7ff89964 [CodeComplete] Fix crash when completing ObjC block parameter with a broken type
Summary:
The fix isn't great, but it's hard to fix properly because the completion
code sensibly uses ParmVarDecl to represent parameters, but the AST-building
code sensibly doesn't synthesize them if the type is broken.
Also this case is apparently really rare, so it's probably not worth bending
over backwards for.

Reviewers: ilya-biryukov

Subscribers: javed.absar, kristof.beyls, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D60258

llvm-svn: 357686
2019-04-04 11:34:18 +00:00
Duncan P. N. Exon Smith db8a742206 Basic: Return a reference from FileManager::getVirtualFileSystem, NFC
FileManager constructs a VFS in its constructor if it isn't passed one,
and there's no way to reset it.  Make that contract clear by returning a
reference from its accessor.

https://reviews.llvm.org/D59388

llvm-svn: 357038
2019-03-26 22:32:06 +00:00
Bruno Ricci 70ad396bc4 [Sema][NFCI] Don't allocate storage for the various CorrectionCandidateCallback unless we are going to do some typo correction
The various CorrectionCandidateCallbacks are currently heap-allocated
unconditionally. This was needed because of delayed typo correction.
However these allocations represent currently 15.4% of all allocations
(number of allocations) when parsing all of Boost (!), mostly because
of ParseCastExpression, ParseStatementOrDeclarationAfterAttrtibutes
and isCXXDeclarationSpecifier. Note that all of these callback objects
are small. Let's not do this.

Instead initially allocate the callback on the stack, and only do a
heap allocation if we are going to do some typo correction. Do this by:

1. Adding a clone function to each callback, which will do a polymorphic
   clone of the callback. This clone function is required to be implemented
   by every callback (of which there is a fair amount). Make sure this is
   the case by making it pure virtual.

2. Use this clone function when we are going to try to correct a typo.

This additionally cut the time of -fsyntax-only on all of Boost by 0.5%
(not that much, but still something). No functional changes intended.

Differential Revision: https://reviews.llvm.org/D58827

Reviewed By: rnk

llvm-svn: 356925
2019-03-25 17:08:51 +00:00
David Goldman 3e804d2581 Support framework import/include auto-completion
Frameworks filesystem representations:
  UIKit.framework/Headers/%header%

Framework import format:
  #import <UIKit/%header%>

Thus the completion code must map the input format of <UIKit/> to
the path of UIKit.framework/Headers as well as strip the
".framework" suffix when auto-completing the framework name.

llvm-svn: 355008
2019-02-27 17:40:33 +00:00
Ilya Biryukov ff2a99752f [CodeComplete] Propagate preferred type for function arguments in more cases
Summary:
See the added test for some new cases.
This change also removes special code completion calls inside the
ParseExpressionList function now that we properly propagate expected
type to the function responsible for parsing elements of the expression list
(ParseAssignmentExpression).

Reviewers: kadircet

Reviewed By: kadircet

Subscribers: xbolva00, jdoerfert, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D58541

llvm-svn: 354864
2019-02-26 11:01:50 +00:00
Eric Liu 206740e756 [CodeComplete] Collect visited contexts when scope specifier is invalid.
Summary:
This will allow completion consumers to guess the specified scope by
putting together scopes in the context with the specified scope (e.g. when the
specified namespace is not imported yet).

Reviewers: ilya-biryukov

Subscribers: jdoerfert, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D58446

llvm-svn: 354570
2019-02-21 11:22:58 +00:00
Benjamin Kramer 756ecb8e44 Make some helper functions static. NFC.
llvm-svn: 353705
2019-02-11 14:52:15 +00:00
Ilya Biryukov 4f9543b4d6 [CodeComplete] Propagate preferred types through parser in more cases
Preferred types are used by code completion for ranking. This commit
considerably increases the number of points in code where those types
are propagated.

In order to avoid complicating signatures of Parser's methods, a
preferred type is kept as a member variable in the parser and updated
during parsing.

Differential revision: https://reviews.llvm.org/D56723

llvm-svn: 352788
2019-01-31 20:20:32 +00:00
Anastasia Stulova c61eaa5920 Rename getTypeQualifiers to getMethodQualifiers.
Use more descriptive name for the method qualifiers getter.

Differential Revision: https://reviews.llvm.org/D56792

llvm-svn: 352349
2019-01-28 11:37:49 +00:00
Ilya Biryukov c514adef05 [CodeComplete] [clangd] Fix crash on ValueDecl with a null type
Reviewers: kadircet

Reviewed By: kadircet

Subscribers: ioeric, MaskRay, jkorous, arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D57093

llvm-svn: 352040
2019-01-24 10:41:43 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
Bruno Ricci e5bcf0beb1 [Sema][NFC] Fix Wimplicit-fallthrough warning in getCursorKindForDecl
All cases are covered so add an llvm_unreachable. NFC.

llvm-svn: 349933
2018-12-21 17:52:13 +00:00
Ilya Biryukov b45d851bdd [CodeComplete] Properly determine qualifiers of 'this' in a lambda
Summary:
The clang used to pick up the qualifiers of the lamba's call operator
(which is always const) and fail to show non-const methods of 'this' in
completion results.

Reviewers: kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D55885

llvm-svn: 349655
2018-12-19 18:01:24 +00:00
Ilya Biryukov 67dbeb6c6a [CodeComplete] Temporarily disable failing assertion
Found the case in the clang codebase where the assertion fires.
To avoid crashing assertion-enabled builds before I re-add the missing
operation.
Will restore the assertion alongside the upcoming fix.

llvm-svn: 349061
2018-12-13 17:23:48 +00:00
Ilya Biryukov 4974d75d7c [CodeComplete] Fill preferred type on binary expressions
Reviewers: kadircet

Reviewed By: kadircet

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D55648

llvm-svn: 349053
2018-12-13 16:06:11 +00:00
Ilya Biryukov 4110967c7b [CodeComplete] Set preferred type to bool on conditions
Reviewers: kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D55431

llvm-svn: 349050
2018-12-13 15:36:32 +00:00
Mikael Nilsson 9d2872db74 [OpenCL] Add generic AS to 'this' pointer
Address spaces are cast into generic before invoking the constructor.

Added support for a trailing Qualifiers object in FunctionProtoType.

Note: This recommits the previously reverted patch, 
      but now it is commited together with a fix for lldb.

Differential Revision: https://reviews.llvm.org/D54862

llvm-svn: 349019
2018-12-13 10:15:27 +00:00
Mikael Nilsson 90646732bf Revert "[OpenCL] Add generic AS to 'this' pointer"
Reverting because the patch broke lldb.

llvm-svn: 348931
2018-12-12 15:06:16 +00:00
Mikael Nilsson 78de84719b [OpenCL] Add generic AS to 'this' pointer
Address spaces are cast into generic before invoking the constructor.

Added support for a trailing Qualifiers object in FunctionProtoType.

Differential Revision: https://reviews.llvm.org/D54862

llvm-svn: 348927
2018-12-12 14:11:59 +00:00
Ilya Biryukov 98397555a5 [CodeComplete] Fix a crash in access checks of inner classes
Summary: The crash was introduced in r348135.

Reviewers: kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D55260

llvm-svn: 348387
2018-12-05 17:38:39 +00:00
Ilya Biryukov f1822ec431 [CodeComplete] Cleanup access checking in code completion
Summary: Also fixes a crash (see the added 'accessibility-crash.cpp' test).

Reviewers: ioeric, kadircet

Reviewed By: kadircet

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D55124

llvm-svn: 348135
2018-12-03 13:29:17 +00:00
Fangrui Song 0b9d1b7433 [CodeComplete] Delete unused variable in rC342449
llvm-svn: 347508
2018-11-24 00:41:13 +00:00
Fangrui Song 050229df09 [CodeComplete] Format SemaCodeComplete.cpp and improve code consistency
There are some mis-indented places and missing spaces here and there. Just format the whole file.

Also, newer code (from 2014 onwards) in this file prefers const auto *X = dyn_cast to not repeat the Decl type name. Make other occurrences consistent.
Remove two anonymous namespaces that are not very necessary: 1) a typedef 2) a local function (should use static)

llvm-svn: 347507
2018-11-24 00:14:31 +00:00
Sam McCall 8e9baa3f17 [CodeComplete] Penalize inherited ObjC properties for auto-completion
Summary:
Similar to auto-completion for ObjC methods, inherited properties
should be penalized / direct class and category properties should
be prioritized.

Note that currently, the penalty for using a result from a base class
(CCD_InBaseClass) is equal to the penalty for using a method as a
property (CCD_MethodAsProperty).

Reviewers: jkorous, sammccall, akyrtzi, arphaman, benlangmuir

Reviewed By: sammccall, akyrtzi

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D53900

llvm-svn: 347352
2018-11-20 22:06:54 +00:00
Ilya Biryukov ebf0a6d75d [CodeComplete] Do not complete self-initializations
Summary:
Removes references to initialized variable from the following completions:

    int x = ^;

Handles only the trivial cases where the variable name is completed
immediately at the start of initializer or assignment, more complicated
cases aren't covered, e.g. these completions still contain 'x':

    // More complicated expressions.
    int x = foo(^);
    int x = 10 + ^;
    // Other kinds of initialization.
    int x{^};
    int x(^);
    // Constructor initializers.
    struct Foo {
      Foo() : x(^) {}
      int x;
    };

We should address those in the future, but they are outside of the scope of
this initial change.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D54156

llvm-svn: 346301
2018-11-07 10:02:31 +00:00
Kadir Cetinkaya fabaaaaadb [clang] Improve ctor initializer completions.
Summary:
Instead of providing generic "args" for member and base class
initializers, tries to fetch relevant constructors and show their signatures.

Reviewers: ilya-biryukov

Reviewed By: ilya-biryukov

Subscribers: ZaMaZaN4iK, eraman, arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D53654

llvm-svn: 345844
2018-11-01 15:54:18 +00:00
Erik Pilkington fa98390b3c NFC: Remove the ObjC1/ObjC2 distinction from clang (and related projects)
We haven't supported compiling ObjC1 for a long time (and never will again), so
there isn't any reason to keep these separate. This patch replaces
LangOpts::ObjC1 and LangOpts::ObjC2 with LangOpts::ObjC.

Differential revision: https://reviews.llvm.org/D53547

llvm-svn: 345637
2018-10-30 20:31:30 +00:00
Kadir Cetinkaya b006e0995f [clang] Introduce new completion context types
Summary: New name suggestions were being used in places where existing names should have been used, this patch tries to fix some of those situations.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D53191

llvm-svn: 345152
2018-10-24 15:23:49 +00:00
Eric Liu 4a7cd63795 [CodeComplete] Expose InBaseClass signal in code completion results.
Summary:
No new tests as the existing tests for result priority should give us
coverage. Also as the new flag is trivial enough, I'm reluctant to plumb the
flag to c-index-test output.

Reviewers: ilya-biryukov

Reviewed By: ilya-biryukov

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D53635

llvm-svn: 345135
2018-10-24 12:57:27 +00:00
Kadir Cetinkaya 6d57266a8c [clang] Fix a null pointer dereference.
Summary:
Sometimes expression inside switch statement can be invalid, for
example type might be incomplete. In those cases code were causing a null
pointer dereference. This patch fixes that.

Reviewers: sammccall, ioeric, hokein

Reviewed By: sammccall

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D53561

llvm-svn: 345029
2018-10-23 13:49:37 +00:00
Eric Liu 2bfd3f5eb7 [CodeComplete] Fix accessibility of protected members when accessing members implicitly.
Reviewers: ilya-biryukov

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D53369

llvm-svn: 344889
2018-10-22 08:47:31 +00:00
Eric Liu b87c6eba2e [CodeComplete] Make sure keyword 'template' is added even when code pattern is disabled.
Reviewers: sammccall, hokein

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D53284

llvm-svn: 344509
2018-10-15 12:37:23 +00:00
Jonas Devlieghere fc51490baf Lift VFS from clang to llvm (NFC)
This patch moves the virtual file system form clang to llvm so it can be
used by more projects.

Concretely the patch:
 - Moves VirtualFileSystem.{h|cpp} from clang/Basic to llvm/Support.
 - Moves the corresponding unit test from clang to llvm.
 - Moves the vfs namespace from clang::vfs to llvm::vfs.
 - Formats the lines affected by this change, mostly this is the result of
   the added llvm namespace.

RFC on the mailing list:
http://lists.llvm.org/pipermail/llvm-dev/2018-October/126657.html

Differential revision: https://reviews.llvm.org/D52783

llvm-svn: 344140
2018-10-10 13:27:25 +00:00
Sam McCall aeb4b3e632 [CodeComplete] Fix crash when completing params function declarations.
Summary:
In a decl like `int AA(BB cc)` where BB isn't defined, we end up trying to
parse `BB cc` as an expression (vexing parse) and end up triggering the
parser's "recovery-in-function" completion with no actual function
scope.

This patch avoids the assumption that such a scope exists in this context.

Reviewers: kadircet

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D53070

llvm-svn: 344133
2018-10-10 10:51:48 +00:00
Eric Liu b91e08197c [CodeComplete] Re-fix accessibilty of protected members from base class.
Summary:
The initial fix (r337453) had bug and was partially reverted (r338255).
This simplies the original fix by explicitly passing the naming class to the
completion consumer.

Reviewers: ilya-biryukov

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D52647

llvm-svn: 343575
2018-10-02 10:29:00 +00:00
Kadir Cetinkaya ae45d0a4fd [clang] Implement Override Suggestions in Sema.
Summary:
In clangd we had a new type of completion suggestions for cpp
class/struct/unions that will show override signatures for virtual methods in
base classes. This patch implements it in sema because it is hard to deduce more
info about completion token outside of Sema and handle itchy cases.

See the patch D50898 for more info on the functionality.

In addition to above patch this one also converts the suggestion into a
CK_Pattern with whole insertion text as the name of the suggestion and factors
out CodeCompletionString generation for declerations so that it can be re-used
by others.

Reviewers: ioeric, ilya-biryukov

Reviewed By: ioeric

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D52225

llvm-svn: 343568
2018-10-02 09:42:31 +00:00
Sam McCall 3e4f5eb33c [CodeComplete] #include completion treats -I as non-system (require header-like extension).
llvm-svn: 343457
2018-10-01 11:56:42 +00:00
Eric Liu 88de9f6579 [Sema] Do not load macros from preamble when LoadExternal is false.
Reviewers: ilya-biryukov

Reviewed By: ilya-biryukov

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D52079

llvm-svn: 342528
2018-09-19 09:34:55 +00:00
Sam McCall 3d8051abb8 [CodeComplete] Add completions for filenames in #include directives.
Summary:
The dir component ("somedir" in #include <somedir/fo...>) is considered fixed.
We append "foo" to each directory on the include path, and then list its files.

Completions are of the forms:
 #include <somedir/fo^
                   foo.h>
                   fox/

The filter is set to the filename part ("fo"), so fuzzy matching can be
applied to the filename only.

No fancy scoring/priorities are set, and no information is added to
CodeCompleteResult to make smart scoring possible. Could be in future.

Reviewers: ilya-biryukov

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D52076

llvm-svn: 342449
2018-09-18 08:40:41 +00:00
Kadir Cetinkaya 84774c3ae3 [CodeCompletion] Enable signature help when initializing class/struct/union members.
Summary:
Factors out member decleration gathering and uses it in parsing to call signature
help. Doesn't support signature help for base class constructors, the code was too
coupled with diagnostic handling, but still can be factored out but just needs
more afford.

Reviewers: sammccall, ilya-biryukov, ioeric

Reviewed By: ilya-biryukov

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D51917

llvm-svn: 341949
2018-09-11 15:02:18 +00:00
Ilya Biryukov 832c4afe00 [CodeComplete] Clearly distinguish signature help and code completion.
Summary:
Code completion in clang is actually a mix of two features:
- Code completion is a familiar feature. Results are exposed via the
  CodeCompleteConsumer::ProcessCodeCompleteResults callback.
- Signature help figures out if the current expression is an argument of
  some function call and shows corresponding signatures if so.
  Results are exposed via CodeCompleteConsumer::ProcessOverloadCandidates.

This patch refactors the implementation to untangle those two from each
other and makes some naming tweaks to avoid confusion when reading the
code.

The refactoring is required for signature help fixes, see D51038.

The only intended behavior change is the order of callbacks.
ProcessOverloadCandidates is now called before ProcessCodeCompleteResults.

Reviewers: sammccall, kadircet

Reviewed By: sammccall

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D51782

llvm-svn: 341660
2018-09-07 14:04:39 +00:00