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2012-07-16Don't crash when emitting fixits following Unicode characters.Jordan Rose
This code is very sensitive to the difference between "columns" as printed and "bytes" (SourceManager columns). All variables are now named explicitly and our assumptions are (hopefully) documented as both comment and assertion. Whether parseable fixits should use byte offsets or Unicode character counts is pending discussion on the mailing list; currently the implementation uses bytes (and has no problems on lines containing multibyte characters). This has been added to the user manual. <rdar://problem/11877454> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160319 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-12Be lax about trailing whitespace when checking fixit formatting, this ↵Benjamin Kramer
depends on locale settings. If a non-unicode locale is used, the unicode character is escaped and any byte that is in the escaped representation but not the semicolon will become whitespace. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160113 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-12PR13312: Don't crash when printing a fixit that ends in a unicode character.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160112 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-09objective-c: provide fixit hint for @autoreleasepoolFariborz Jahanian
and similar other keywords. // rdar://10723084 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159956 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-09Downgrade the "direct comparison" error for ObjC literals to a warning.Jordan Rose
Chris pointed out that while the comparison is certainly problematic and does not have well-defined behavior, it isn't any worse than some of the other abuses that we merely warn about and doesn't need to make the compilation fail. Revert the release notes change (r159766) now that this is just a new warning. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159939 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-25Extend the "expected ';' after struct" logic to also apply to enums, and toRichard Smith
struct and enum forward-declarations. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159164 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-19Enable -Wnull-conversion for non-integral target types (eg: double).David Blaikie
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158744 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-18Extend the error recovery for a template-argument-list terminated by '>>' toRichard Smith
also deal with '>>>' (in CUDA), '>=', and '>>='. Fix the FixItHints logic to deal with cases where the token is followed by an adjacent '=', '==', '>=', '>>=', or '>>>' token, where a naive fix-it would result in a differing token stream on a re-lex. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158652 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-11Enable -Wunused-private-field with -Wunused.Benjamin Kramer
It found a lot of cruft in LLVM that I removed last week and I couldn't find any false positives. Time to give it more testing. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158317 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-08Add a test for r158229 (overlapping fixits). This was PR10696!Jordan Rose
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158238 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-08Disallow using ObjC literals in direct comparisons (== and friends).Jordan Rose
Objective-C literals conceptually always create new objects, but may be optimized by the compiler or runtime (constant folding, singletons, etc). Comparing addresses of these objects is relying on this optimization behavior, which is really an implementation detail. In the case of == and !=, offer a fixit to a call to -isEqual:, if the method is available. This fixit is directly on the error so that it is automatically applied. Most of the time, this is really a newbie mistake, hence the fixit. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158230 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-07Teach the FixIt in DiagnoseInvalidRedeclaration how to replace the writtenKaelyn Uhrain
nested name specifiers in addition to the function's identifier when the correction has a different nested name specifier. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158178 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-04Make suggestions for mismatched enum arguments to printf/scanf.Jordan Rose
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157962 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-30Add a test for '%@' suggestion for classes.Jordan Rose
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157718 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-30Suggest '%@' for Objective-C objects in ObjC format strings.Jordan Rose
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157716 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-29objc: position of 'fixit' was off by one.Fariborz Jahanian
This patch fixes it. // rdar://11488351 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157646 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-21objective-c: provide a useful 'fixit' suggestion whenFariborz Jahanian
errornously using commas to separate ObjC message arguments. // rdar://11376372 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157216 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-09objective-c. Fixes a 'fixit' where location ofFariborz Jahanian
'*' on objective-c class name was misplaced. // rdar://11311333 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156517 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-30Add FixItHint for -Wnull-conversion to initialize with an appropriate literal.David Blaikie
Reviewed by Doug Gregor. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155839 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-27Imrpove the note text for when a non-type decl hides a tag typeKaelyn Uhrain
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155723 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-26Add note to help explain why a tag such as 'struct' is needed to referKaelyn Uhrain
to a given type, when the reason is that there is a non-type decl with the same name. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155677 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-25Add an error message with fixit hint for changing '.' to '->'.Kaelyn Uhrain
This is mainly for attempting to recover in cases where a class provides a custom operator-> and a '.' was accidentally used instead of '->' when accessing a member of the object returned by the current object's operator->. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155580 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-19Re-add the closing '}' for the namespace I accidentally deleted whenKaelyn Uhrain
removing a (new) duplicate test whose only difference was the tag type being an enum instead of a struct. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155165 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-19In Parser::isCXXDeclarationSpecifier, consider a non-type identifierKaelyn Uhrain
followed by an identifier as declaration specificer (except for ObjC). This allows e.g. an out-of-line C++ member function definitions to be recognized as functions and not as variable declarations if the type name for the first parameter is not recognized as a type--say, when there is a function name shadowing an enum type name and the parameter is missing the "enum" keyword needed to distinguish the two. Note that returning TPResult::Error() instead of TPResult::True() appears to have the same end result, while TPResult::Ambiguous() results in a crash. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155163 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-06Implement support for null non-type template arguments for non-typeDouglas Gregor
template parameters of pointer, pointer-to-member, or nullptr_t type in C++11. Fixes PR9700 / <rdar://problem/11193097>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154219 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-06Added a new attribute, objc_root_class, which informs the compiler when a ↵Patrick Beard
root class is intentionally declared. The warning this inhibits, -Wobjc-root-class, is opt-in for now. However, all clang unit tests that would trigger the warning have been updated to use -Wno-objc-root-class. <rdar://problem/7446698> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154187 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-06Fix diagnostic text for r154163.David Blaikie
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154164 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-06Restrict fixit for missing 'class' in template template parameters.David Blaikie
Based on Doug's feedback to r153887 this omits the FixIt if the following token isn't syntactically valid for the context. (not a comma, '...', identifier, '>', or '>>') There's a bunch of work to handle the '>>' case, but it makes for a much more pleasant diagnostic in this case. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154163 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-05Improve & simplify diagnostic for missing 'class' in template template ↵David Blaikie
parameter. Change suggested by Sebastian Redl on review feedback from r153887. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154102 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-03Replace the workaround from r153445 with a proper fix.Kaelyn Uhrain
Infinite recursion was happening when DiagnoseInvalidRedeclaration called ActOnFunctionDeclarator to check if a typo correction works when the correction was just to the nested-name-specifier because the wrong DeclContext was being passed in. Unlike a number of functions surrounding typo correction, the DeclContext passed in for a function is the context of the function name after applying any nested name specifiers, not the lexical DeclContext where the function+nested-name-specifier appears. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153962 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-02Correct error recovery when missing 'class' in a template template parameter.David Blaikie
The diagnostic message correctly informs the user that they have omitted the 'class' keyword, but neither suggests this insertion as a fixit, nor attempts to recover as if they had provided the keyword. This fixes the recovery, adds the fixit, and adds a separate diagnostic and corresponding replacement fixit for cases where the user wrote 'struct' or 'typename' instead of 'class' (suggested by Richard Smith as a possible common mistake). I'm not sure the diagnostic message for either the original or new cases feel very Clang-esque, so I'm open to suggestions there. The fixit hints make it fairly easy to see what's required, though. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153887 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-29Reject 'template<typename...Ts> void f(Ts ...(x));'. Add a special-caseRichard Smith
diagnostic and a fix-it to explain to the user where the ellipsis is supposed to go. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153622 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-26When diagnosing an invalid out-of-line redeclaration, don't permitDouglas Gregor
typo correction to introduce a nested-name-specifier; we aren't prepared to handle it here. Fixes PR12297 / <rdar://problem/11075219>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153445 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-18Use character literals for vexing initialization fixit hints.David Blaikie
Instead of suggesting " = 0" for "char c();", suggest " = '\0'", and similarly for other char types (wide, 16, and 32). Add tests for all these, and since this means testing such hints under C++0x, add tests for some untested C++0x hint cases in the existing code, including suggesting nullptr for pointer initialization. This sets up the initialization helper to provide better type fidelity that will be especially helpful for non-assignment cases (such as fixit-correcting NULL usage in function calls (eg: foo(char) + foo(NULL) => foo('\0') instead of the less informative foo(0))) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153008 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-08Fix a couple of issues with literal-operator-id parsing, and provide recoveryRichard Smith
for a few kinds of error. Specifically: Since we're after translation phase 6, the "" token might be formed by multiple source-level string literals. Checking the token width is not a correct way of detecting empty string literals, due to escaped newlines. Diagnose and recover from a missing space between "" and suffix, and from string literals other than "", which are followed by a suffix. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152348 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-08Implement C++11 [lex.ext]p10 for string and character literals: a ud-suffix notRichard Smith
starting with an underscore is ill-formed. Since this rule rejects programs that were using <inttypes.h>'s macros, recover from this error by treating the ud-suffix as a separate preprocessing-token, with a DefaultError ExtWarn. The approach of treating such cases as two tokens is under discussion for standardization, but is in any case a conforming extension and allows existing codebases to keep building while the committee makes up its mind. Reword the warning on the definition of literal operators not starting with underscores (which are, strangely, legal) to more explicitly state that such operators can't be called by literals. Remove the special-case diagnostic for hexfloats, since it was both triggering in the wrong cases and incorrect. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152287 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-08improve on diagnostic when block captures uninitializedFariborz Jahanian
block variable. // rdar://10817031 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152273 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-08improve on diagnostic and provide a fixit hint whenFariborz Jahanian
an uninitialized block variable is being called inside the block literal. // rdar://10817031 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152271 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-07Test fix-it added in r152198.Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152199 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-06And libclang cursor/indexing support for new Objective-C ↵Ted Kremenek
NSArray/NSDictionary/NSNumber literals. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152138 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-29Test for my last patch. // rdar://10267155.Fariborz Jahanian
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151767 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Tests for the fixits which Doug added in r150727.Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150777 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Reject continue/break statements within members of local functions nested withinRichard Smith
loop and switch statements, by teaching Scope that a function scope never has a continue/break parent for the purposes of control flow. Remove the hack in block and lambda expressions which worked around this by pretending that such expressions were continue/break scopes. Remove Scope::ControlParent, since it's unused. In passing, teach default statements to recover properly from a missing ';', and add a fixit for same to both default and case labels (the latter already recovered correctly). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150776 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-10Allow implicit capture of 'this' in a lambda even when the captureDouglas Gregor
default is '=', and reword the warning about explicitly capturing 'this' in such lambdas to indicate that only explicit capture is banned. Introduce Fix-Its for this and other "save the programmer from themself" rules regarding what can be explicitly captured and what must be implicitly captured. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150256 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-10PR11684, core issue 1417:Richard Smith
o Correct the handling of the restrictions on usage of cv-qualified and ref-qualified function types. o Fix a bug where such types were rejected in template type parameter default arguments, due to such arguments not being treated as a template type arg context. o Remove the ExtWarn for usage of such types as template arguments; that was a standard defect, not a GCC extension. o Improve the wording and unify the code for diagnosing cv-qualifiers with the code for diagnosing ref-qualifiers. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150244 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-26Introduce 3 new fixit options:Argyrios Kyrtzidis
-fixit-recompile applies fixits and recompiles the result -fixit-to-temporary applies fixits to temporary files -fix-only-warnings">, applies fixits for warnings only, not errors Combining "-fixit-recompile -fixit-to-temporary" allows testing the result of fixits without touching the original sources. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149027 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-19Extend the error of invalid token after declarations to include fixits for Richard Trieu
!=, %=, ^=, &=, *=, -=, |=, /=, <<=, <=, >=, and >>= to =. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148499 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-18Change the error when a '+=' follows a declaration to suggest a fixit to '=' ↵Richard Trieu
instead of just suggesting a ';'. Old error: plusequaldeclare1.cc:3:8: error: expected ';' at end of declaration int x += 6; ^ ; New error: plusequaldeclare1.cc:3:9: error: invalid '+=' at end of declaration; did you mean '='? int x += 6; ^~ = git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148433 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-12Improve 0-argument -Wvexing-parse diagnostic by adding notes with fix-its:Richard Smith
- If the declarator is at the start of a line, and the previous line contained another declarator and ended with a comma, then that comma was probably a typo for a semicolon: int n = 0, m = 1, l = 2, // k = 5; myImportantFunctionCall(); // oops! - If removing the parentheses would correctly initialize the object, then produce a note suggesting that fix. - Otherwise, if there is a simple initializer we can suggest which performs value-initialization, then provide a note suggesting a correction to that initializer. Sema::Declarator now tracks the location of the comma prior to the declarator in the declaration, if there is one, to facilitate providing the note. The code to determine an appropriate initializer from the -Wuninitialized warning has been factored out to allow use in both that and -Wvexing-parse. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148072 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-10Update C++11 scoped enumeration support to match the final proposal:Richard Smith
- reject definitions of enums within friend declarations - require 'enum', not 'enum class', for non-declaring references to scoped enumerations git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147824 91177308-0d34-0410-b5e6-96231b3b80d8