216 Commits

Author SHA1 Message Date
Nico Weber
b76de88288 Formatter: Detect ObjC method expressions after unary operators.
llvm-svn: 174384
2013-02-05 16:21:00 +00:00
Daniel Jasper
1ac3e05bbd Initial support for formatting ObjC method declarations/calls.
We can now format stuff like:
- (void)doSomethingWith:(GTMFoo *)theFoo
                   rect:(NSRect)theRect
               interval:(float)theInterval {
  [myObject doFooWith:arg1 //
                 name:arg2
                error:arg3];

}

This seems to fix everything mentioned in llvm.org/PR14939.

llvm-svn: 174364
2013-02-05 10:07:47 +00:00
Daniel Jasper
b9ebd5d30e Fix some linebreak decisions in Google format.
Before:
f(aaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaa +
  aaaaaaaaaaaaaaaaaaaa);
aaaaaaa(aaaaaaaaaaaaa, aaaaaaaaaaaaa, aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa,
                                                    aaaaaaaaaaaaaaaa));

After:
f(aaaaaaaaaaaaaaaaaaaa,
  aaaaaaaaaaaaaaaaaaaa,
  aaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaa);
aaaaaaa(aaaaaaaaaaaaa,
        aaaaaaaaaaaaa,
        aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaa));

llvm-svn: 174363
2013-02-05 09:41:21 +00:00
Daniel Jasper
a885dbeb96 Fix formatting regression introduced by r174307.
In preprocessor definitions, we would not parse all the tokens and thus
not annotate them anymore. This led to a wrong formatting of comments
in google style:

  #endif // HEADER_GUARD  -- requires two spaces

llvm-svn: 174361
2013-02-05 09:34:14 +00:00
Daniel Jasper
14e40ec828 Improve handling of trailing block comments
This is a follow up to r174309 to actually make it work.

llvm-svn: 174314
2013-02-04 08:34:57 +00:00
Daniel Jasper
2603ee0dc6 Improve formatting of stream operators.
If there are string literals on either side of a '<<', chances are
high that they represent logically separate concepts. Otherwise,
the author could just have just a single literal (possible split
over multiple lines).

So, we can now nicely format things like:
cout << "somepacket = {\n"
     << "  val a = " << ValueA << "\n"
     << "  val b = " << ValueB << "\n"
     << "}";

llvm-svn: 174310
2013-02-04 07:34:48 +00:00
Daniel Jasper
1f140981b6 Improve handling of trailing block comments.
We can now (even in non-bin-packing modes) format:
someFunction(1, /* comment 1 */
             2, /* comment 2 */
             3, /* comment 3 */
             aaa);

llvm-svn: 174309
2013-02-04 07:32:14 +00:00
Daniel Jasper
f7f13c0ef2 Fix an error in formatting of for-loops.
Two minor changes:
* Slight penalty for breaking at "," as opposed to ";".
* Don't apply bin-packing rules to for-loops.

Before:
for (int aaaaaa = aaaaaaaaaa; aaaaaa < bbbbbbbb; ++aaaaaa,
         ++ccccccccccccccc) {}

After:
for (int aaaaaa = aaaaaaaaaa; aaaaaa < bbbbbbbb;
     ++aaaaaa, ++ccccccccccccccc) {}

llvm-svn: 174308
2013-02-04 07:30:30 +00:00
Daniel Jasper
3a9370cbca Restructuring of token annotation for formatting.
This combines several changes:
* Calculation token type (e.g. for * and &) in the AnnotatingParser.
* Calculate the scope binding strength in the AnnotatingParser.
* Let <> and [] scopes bind stronger than () and {} scopes.
* Add minimal debugging output.

llvm-svn: 174307
2013-02-04 07:21:18 +00:00
Daniel Jasper
1ca05ccf68 Fix bug in formatting of nested initializers.
We can now format:
SomeArrayOfSomeType a = { { { 1, 2, 3 } }, { { 1, 2, 3 } },
                          { { 111111111111111111111111111111,
                              222222222222222222222222222222,
                              333333333333333333333333333333 } },
                          { { 1, 2, 3 } }, { { 1, 2, 3 } } };

Before, we did strange things there.

llvm-svn: 174291
2013-02-03 18:07:15 +00:00
Manuel Klimek
591b580255 Never break inside something that was a preprocessor directive.
Just put it in one unwrapped line and let the formatter handle it.

llvm-svn: 174063
2013-01-31 15:58:48 +00:00
Daniel Jasper
8a8ce2406a Several improvements to the formatting of static initializers.
1. Never avoid bin packing in static initializers as this can
   lead to terrible results.
2. If an element has to be broken over multiple lines, break after
   the following comma.

This should be a step forward, but there are still many cases
especially with nested static initializers that we handle badly.
More patches will follow.

llvm-svn: 174061
2013-01-31 14:59:26 +00:00
Daniel Jasper
7b038a2381 Don't generate no-op replacements.
No functional changes.

llvm-svn: 173916
2013-01-30 09:46:12 +00:00
Daniel Jasper
ddaa9be978 Improve formatting of code with comments.
Before:
aaaaaaa(aaaaaa( // comment
                aaaaaaa));
<big mess>

After:
aaaaaaa(aaaaaa( // comment
    aaaaaaaa));
function(/* parameter 1 */ aaaaaaa,
         /* parameter 2 */ aaaaaaa,
         /* parameter 3 */ aaaaaaa,
         /* parameter 4 */ aaaaaaa);

(the latter example was only wrong in the one-arg-per-line mode, e.g. in
Google style).

llvm-svn: 173821
2013-01-29 19:41:55 +00:00
Daniel Jasper
f7db433ed4 Allow all parameters on next line for function calls in Chrome.
The style guide only forbids this for function declarations. So,
now

someFunction(
    aaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa, aaaaaaaaaaaa);

Is allowed in Chromium mode.

llvm-svn: 173806
2013-01-29 16:03:49 +00:00
Daniel Jasper
38c11ce93d Initial support for multiple variable declarations.
Before:
  SomeType aaaaaaaaaaaaaaaaa = aaaaaa->aaaaaaaaaaaaaaaaa(),
      aaaaaaaaaaa = aaaaaa->aaaaaaaaaaa();
After:
  SomeType aaaaaaaaaaaaaaaaa = aaaaaa->aaaaaaaaaaaaaaaaa(),
           aaaaaaaaaaa = aaaaaa->aaaaaaaaaaa();

llvm-svn: 173792
2013-01-29 11:21:01 +00:00
Daniel Jasper
6a217e1815 Reverting changes from r173785 (removing empty lines before "}").
This needs some more thinking, e.g. for namespaces, chains of if-else
if, ...

llvm-svn: 173787
2013-01-29 10:00:16 +00:00
Daniel Jasper
aa94a90a79 Remove empty lines before "}".
Those empty lines waste vertical whitespace and almost never
increase readability.

Before:
void f() {
  DoSomething();

}

After:
void f() {
  DoSomething();
}

llvm-svn: 173785
2013-01-29 09:42:11 +00:00
Daniel Jasper
48c62f980f Fix a bug that would lead to bad line break decisions in for loops.
Before:
    for (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaa = aaaaaaaaaaaaaaa
             .aaaaaaaaaaaaaaaa;
         aaaaaaaaaaa != aaaaaaaaaaaaaaaaaaa; ++aaaaaaaaaaa) {}

After:
    for (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaa =
             aaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaa;
         aaaaaaaaaaa != aaaaaaaaaaaaaaaaaaa; ++aaaaaaaaaaa) {}

llvm-svn: 173695
2013-01-28 17:30:17 +00:00
Daniel Jasper
d36ef5e40c Don't put a function's return type on its own line in Google style.
This would be against the style guide:
http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml?showone=Function_Declarations_and_Definitions#Function_Declarations_and_Definitions

Not sure what to do as a last resort if the function signature does not
fit onto a single line in Google style ..

llvm-svn: 173690
2013-01-28 15:40:20 +00:00
Daniel Jasper
d2639ef502 Let clang-format break after a function's return type.
Before:
TypeSpecDecl *TypeSpecDecl::Create(ASTContext &C, DeclContext *DC,
                                   SourceLocation L, IdentifierInfo *II,
                                   Type *T) {}

After:
TypeSpecDecl *
TypeSpecDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
                     IdentifierInfo *II, Type *T) {}

This fixes llvm.org/PR14717.

llvm-svn: 173688
2013-01-28 15:16:31 +00:00
Daniel Jasper
65585ed86a Make continuations in constructor initializers consistent.
Before:
Constructor
    : LooooooooooooooooooooongVariable(
        LooooooooooooooooooooongValue) {}

After:
Constructor
    : LooooooooooooooooooooongVariable(
          LooooooooooooooooooooongValue) {}

llvm-svn: 173685
2013-01-28 13:31:35 +00:00
Daniel Jasper
0b41cbb533 Initial support for formatting range-based for-loops.
Before (in good cases):
for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
     : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}
for (auto aaaaaaaaaaaaaaaaaaaa : aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaa,
aaaa)) {}

After:
for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa :
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}
for (auto aaaaaaaaaaaaaaaaaaaa :
     aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaa, aaaa)) {}

llvm-svn: 173684
2013-01-28 13:21:16 +00:00
Daniel Jasper
ca6623b9e3 Improve formatting of conditional expressions.
Before we did not really systematically format those. Now, we format the
different cases as:

- 1 Line:  a ? b : c;
- 2 Lines: short ? loooooooooong
                 : loooooooooong
- 2 Lines: loooooooooooooooong
               ? short : short
- 3 Lines: loooooooooooooooong
               ? loooooooooooooong
               : loooooooooooooong

Not sure whether "?" and ":" should go on the new line, but it seems to
be the most consistent approach.

llvm-svn: 173683
2013-01-28 12:45:14 +00:00
Daniel Jasper
20b09efabb Several small changes in formatting decisions.
1. Use a hanging ident for function calls nested in binary expressions.
   E.g.:
   int aaaaa = aaaaaaaaa && aaaaaaaaaa(
                                aaaaaaaaaa);

2. Slightly improve heuristic for builder type expressions and reduce
   penalty for breaking before "." and "->" in those.

3. Remove  mostly obsolete metric of decreasing indent level. This
   fixes: llvm.org/PR14931.

Changes #1 and #2 were necessary to keep tests passing after #3.

llvm-svn: 173680
2013-01-28 09:35:24 +00:00
Daniel Jasper
4ad4235986 Improve indentation after breaking at nested name specifiers.
These always represent a continuation and we should increase the ident.

Before:
aaaaaaaaa(aaaaaaaaaaaaaaaaaaaaa::
          aaaaaaaaaaaaaaaaaaaa);

After:
aaaaaaaaa(aaaaaaaaaaaaaaaaaaaaa::
              aaaaaaaaaaaaaaaaaaaa);

llvm-svn: 173675
2013-01-28 07:43:15 +00:00
Daniel Jasper
7b5773e9c7 Avoid confusing identations for multi-parameter functions.
Before:
aaaaaaaa(aaaaaaaaa(
    aaaaaaaaaa(),
         aaaaaaaaa);

After:
aaaaaaaa(aaaaaaaaa(
             aaaaaaaaaa(),
         aaaaaaaaa);

llvm-svn: 173673
2013-01-28 07:35:34 +00:00
Daniel Jasper
7a31af140b Fix some alignment and line break decisions.
This combines two small changes:
1) Put a penalty on breaking after "<"
2) Only produce a hanging indent when parameters are separated by
commas.

Before:
aaaaaaaaaaaaaaaaaaaaaaaa<
    aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa>(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);
aaaaaa(new Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
               aaaaaaaaaaaaaaaaaaaaaaaaaaaaa));

After:
aaaaaaaaaaaaaaaaaaaaaaaa<aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa>(
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);
aaaaaa(new Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaa));

This changes one ObjC test, but AFAICT this is not according to any
style guide (neither before nor after). We probably should be aligning
on the ":" there according to:
http://google-styleguide.googlecode.com/svn/trunk/objcguide.xml?showone=Method_Invocations#Method_Invocations

llvm-svn: 173457
2013-01-25 15:43:32 +00:00
Daniel Jasper
45797021b7 Allow breaking after "::" if absolutely necessary.
Otherwise, really long nested name specifiers can easily lead to a
violation of the column limit.

Not sure about the rules for indentation in those cases, so input is
appreciated (see tests.).

llvm-svn: 173438
2013-01-25 10:57:27 +00:00
Daniel Jasper
39e2738c8b Add extra indent for nested calls inside if's.
Before:
if (aaaaaaaaaa(
    aaaaaaaaaa)) {}

After:
if (aaaaaaaaaa(
        aaaaaaaaaa)) {}

llvm-svn: 173290
2013-01-23 20:41:06 +00:00
Daniel Jasper
a836b90aa7 Don't try to align builder-type continuations on assignments.
Before:
int aaaa = aaaaa().aaaaa() // force break
           .aaaaa();
After:
int aaaa = aaaaa().aaaaa() // force break
    .aaaaa();

The other indent is just wrong and confusing.

llvm-svn: 173273
2013-01-23 16:58:21 +00:00
Daniel Jasper
1565eb3e38 Don't try to do a hanging ident after assignments.
Before:
bool aaaa = aaaaaaaaaaa(
                aaaaaaaaaaaaaaaaa);

After:
bool aaaa = aaaaaaaaaaa(
    aaaaaaaaaaaaaaaaa);

The other indentation was a nice attempt but doesn't work in many cases.
Not sure what the right long term solution is as the "After: " is still
not nice. We either need to figure out what to do in the cases where it
"doesn't work" or come up with a third solution, e.g. falling back to:

bool aaaa =
    aaaaaaaaaaa(
        aaaaaaaaaaaaaaaaa);

which should always work and nicely highlight the structure.

llvm-svn: 173268
2013-01-23 15:55:19 +00:00
Manuel Klimek
d053c5b43a Fix handling of macro definitions.
Now correctly formats:
 #define A (1)

llvm-svn: 173264
2013-01-23 14:37:36 +00:00
Manuel Klimek
c1237a8b8f Fixes layouting regression and invalid-read.
Layouting would prevent breaking before + in
a[b + c] = d;
Regression detected by code review.

Also fixes an invalid-read found by the valgrind bot.

llvm-svn: 173262
2013-01-23 14:08:21 +00:00
Daniel Jasper
420d7d333e Fix the formatting of pointer/reference types in range-based for loops.
Before: for (int & a : Values) {}
After:  for (int &a : Values) {}
llvm-svn: 173259
2013-01-23 12:58:14 +00:00
Daniel Jasper
43b6548ce0 Removing the penalty for breaking after "=".
Having seen more cases, this actually was not a good thing to do in the
first place. We can still improve on what we do now, but breaking after
the "=" is good in many cases.

Before:
aaaaaaaaaaaaa = aa->aaaaaaaaaaaaaaaaaaaa(
                    aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaa));

After:
aaaaaaaaaaaaa =
    aa->aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaa));

llvm-svn: 173257
2013-01-23 12:27:43 +00:00
Daniel Jasper
5b49f47835 Fix another regression for pointer types.
Before: if (int * a = &b) ...
After:  if (int *a = &b) ...

Also changed all the existing tests to test the expressions in question
both in a declaration and in an expression context.

llvm-svn: 173256
2013-01-23 12:10:53 +00:00
Daniel Jasper
b9c0908f7c Fix regression in formatting pointer types.
We will need a more principled solution, but we should not leave this
unfixed until we come up with one.

Before: void f() { int * a; }
After:  void f() { int *a; }
llvm-svn: 173252
2013-01-23 11:15:14 +00:00
Manuel Klimek
390805731f Fixes incorrect handling of the declaration context stack.
llvm-svn: 173250
2013-01-23 11:03:04 +00:00
Manuel Klimek
d33516ef32 Fix segfaults in the formatter.
Also: expletive deleted.
llvm-svn: 173247
2013-01-23 10:09:28 +00:00
Daniel Jasper
e941b169db Add option to allow putting all parameters onto the next line.
This only affects styles where BinPackParameters is false.

With AllowAllParametersOnNextLine:
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
    aaaaaaaaaa, aaaaaaaaaa, aaaaaaaaaa, aaaaaaaaaaa, aaaaaaaaaaa);

Without it:
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaa,
                                         aaaaaaaaaa,
                                         aaaaaaaaaa,
                                         aaaaaaaaaaa,
                                         aaaaaaaaaaa);

llvm-svn: 173246
2013-01-23 10:08:28 +00:00
Manuel Klimek
0a3a3c9900 Allow us to better guess the context of an unwrapped line.
This gives us the ability to guess better defaults for whether a *
between identifiers is a pointer dereference or binary operator.

Now correctly formats:
void f(a *b);
void f() { f(a * b); }

llvm-svn: 173243
2013-01-23 09:32:48 +00:00
Nico Weber
6029d4f3ae Formatter: Remove a fixme klimek fixed in r173168.
Add a few comments to the ObjC test cases.

llvm-svn: 173169
2013-01-22 16:53:59 +00:00
Manuel Klimek
f92f7bc540 Implements more principled comment parsing.
Changing nextToken() in the UnwrappedLineParser to get the next
non-comment token. This allows us to correctly layout a whole class of
snippets, like:

if /* */(/* */ a /* */) /* */
  f() /* */; /* */
else /* */
  g();

Fixes a bug in the formatter where we would assume there is a previous
non-comment token.
Also adds the indent level of an unwrapped line to the debug output in
the parser.

llvm-svn: 173168
2013-01-22 16:31:55 +00:00
Daniel Jasper
50e7ab7185 Let the formatter be more restrictive for breaking around . and ->
Before:
aaaaaaaaaaaaaaa(aaaaaaaaa, aaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaa)
    .aaaaaaaaaaaaaaaaaa();

After:
aaaaaaaaaaaaaaa(aaaaaaaaa, aaaaaaaaa,
                aaaaaaaaaaaaaaaaaaaaaaa).aaaaaaaaaaaaaaaaaa();

llvm-svn: 173160
2013-01-22 14:28:24 +00:00
Daniel Jasper
0b8206029b Fix "*" formatting when creating arrays of pointers.
Before: A = new int * [10]();
After:  A = new int *[10]();
llvm-svn: 173150
2013-01-22 11:46:26 +00:00
Daniel Jasper
304a986a72 Remove "incorrect" aligning of trailing comments.
We used to align trailing comments belong to different things.
Before:
void f() { // some function..
}
int a;     // some variable..

After:
void f() { // some function..
}
int a; // some variable..

llvm-svn: 173100
2013-01-21 22:49:20 +00:00
Manuel Klimek
2cec01916c Fixes various problems around enum parsing.
Very similar to what we do for record definitions:
- tighten down what is an enum definition, so that we don't mistake a
  function for an enum
- allow common idioms around declarations (we'll want to handle that
  more centrally in the future)

We now correctly format:
enum X f() {
  a();
  return 42;
}

llvm-svn: 173075
2013-01-21 19:17:52 +00:00
Manuel Klimek
a4fe1c13c0 Fixes formatting of empty blocks.
We now only put empty blocks into a single line, if all of:
- all tokens of the structural element fit into a single line
- we're not in a control flow statement

Note that we usually don't put record definitions into a single line, as
there's usually at least one more token (the semicolon) after the
closing brace. This doesn't hold when we are in a context where there is
no semicolon, like "enum E {}".

There were some missing tests around joining lines around the corner
cases of the allowed number of columns, so this patch adds some.

llvm-svn: 173055
2013-01-21 16:42:44 +00:00
Daniel Jasper
c228619bb1 Fix parsing of templated declarations.
Before: template <template <typename T>, typename P > class X;
After:  template <template <typename T>, typename P> class X;

More importantly, the token annotations for the second ">" are now computed
correctly.

llvm-svn: 173047
2013-01-21 14:39:22 +00:00