This includes adding the new TypoExpr-based lazy typo correction to
LookupMemberExprInRecord as an alternative to the existing eager typo
correction.
---
lib/Sema/SemaExprMember.cpp | 149 +++++++++++++++++++++++++++++--
test/SemaCXX/arrow-operator.cpp | 5 +-
test/SemaCXX/typo-correction-delayed.cpp | 32 +++++++
test/SemaCXX/typo-correction-pt2.cpp | 2 +-
test/SemaCXX/typo-correction.cpp | 10 +--
5 files changed, 182 insertions(+), 16 deletions(-)
create mode 100644 test/SemaCXX/typo-correction-delayed.cpp
diff --git a/lib/Sema/SemaExprMember.cpp b/lib/Sema/SemaExprMember.cpp
index aca3df1..42ad82a 100644
--- a/lib/Sema/SemaExprMember.cpp
+++ b/lib/Sema/SemaExprMember.cpp
@@ -10,6 +10,7 @@
// This file implements semantic analysis member access expressions.
//
//===----------------------------------------------------------------------===//
+#include "clang/Sema/Overload.h"
#include "clang/Sema/SemaInternal.h"
#include "clang/AST/ASTLambda.h"
#include "clang/AST/DeclCXX.h"
@@ -569,13 +570,47 @@ class RecordMemberExprValidatorCCC : public CorrectionCandidateCallback {
const RecordDecl *const Record;
};
+class MemberTypoDiags : public TypoDiagnosticGenerator {
+ Sema &SemaRef;
+ DeclContext *Ctx;
+ DeclarationName Typo;
+ SourceLocation TypoLoc;
+ SourceRange BaseRange;
+ SourceRange ScopeSpecLoc;
+ unsigned DiagnosticID;
+ unsigned NoSuggestDiagnosticID;
+
+public:
+ MemberTypoDiags(Sema &SemaRef, DeclContext *Ctx, DeclarationName Typo,
+ SourceLocation TypoLoc, SourceRange BaseRange,
+ CXXScopeSpec &SS, unsigned DiagnosticID,
+ unsigned NoSuggestDiagnosticID)
+ : SemaRef(SemaRef), Ctx(Ctx), Typo(Typo), TypoLoc(TypoLoc), BaseRange(BaseRange),
+ ScopeSpecLoc(SS.getRange()), DiagnosticID(DiagnosticID),
+ NoSuggestDiagnosticID(NoSuggestDiagnosticID) {}
+
+ void operator()(TypoCorrection &TC) override {
+ if (TC) {
+ assert(!TC.isKeyword() && "Got a keyword as a correction for a member!");
+ bool DroppedSpecifier =
+ TC.WillReplaceSpecifier() &&
+ Typo.getAsString() == TC.getAsString(SemaRef.getLangOpts());
+ SemaRef.diagnoseTypo(TC, SemaRef.PDiag(DiagnosticID) << Typo << Ctx
+ << DroppedSpecifier
+ << ScopeSpecLoc);
+ } else {
+ SemaRef.Diag(TypoLoc, NoSuggestDiagnosticID) << Typo << Ctx << BaseRange;
+ }
+ }
+};
+
}
-static bool
-LookupMemberExprInRecord(Sema &SemaRef, LookupResult &R,
- SourceRange BaseRange, const RecordType *RTy,
- SourceLocation OpLoc, CXXScopeSpec &SS,
- bool HasTemplateArgs) {
+static bool LookupMemberExprInRecord(
+ Sema &SemaRef, LookupResult &R, SourceRange BaseRange,
+ const RecordType *RTy, SourceLocation OpLoc, CXXScopeSpec &SS,
+ bool HasTemplateArgs, TypoExpr **TE = nullptr,
+ std::unique_ptr<TypoRecoveryCallback> TRC = nullptr) {
RecordDecl *RDecl = RTy->getDecl();
if (!SemaRef.isThisOutsideMemberFunctionBody(QualType(RTy, 0)) &&
SemaRef.RequireCompleteType(OpLoc, QualType(RTy, 0),
@@ -619,6 +654,21 @@ LookupMemberExprInRecord(Sema &SemaRef, LookupResult &R,
if (!R.empty())
return false;
+ if (TE && SemaRef.getLangOpts().CPlusPlus) {
+ // TODO: C cannot handle TypoExpr nodes because the C code paths do not know
+ // what to do with dependent types e.g. on the LHS of an assigment.
+ *TE = SemaRef.CorrectTypoDelayed(
+ R.getLookupNameInfo(), R.getLookupKind(), nullptr, &SS,
+ llvm::make_unique<RecordMemberExprValidatorCCC>(RTy),
+ llvm::make_unique<MemberTypoDiags>(
+ SemaRef, DC, R.getLookupName(), R.getNameLoc(), BaseRange, SS,
+ diag::err_no_member_suggest, diag::err_no_member),
+ std::move(TRC),
+ Sema::CTK_ErrorRecovery, DC);
+ R.clear();
+ return false;
+ }
+
// We didn't find anything with the given name, so try to correct
// for typos.
DeclarationName Name = R.getLookupName();
@@ -1148,6 +1198,86 @@ Sema::PerformMemberExprBaseConversion(Expr *Base, bool IsArrow) {
return CheckPlaceholderExpr(Base);
}
+namespace {
+
+class MemberExprTypoRecovery : public TypoRecoveryCallback {
+ Expr *BaseExpr;
+ std::unique_ptr<CXXScopeSpec> SS;
+ SourceLocation OpLoc;
+ bool IsArrow;
+
+public:
+ MemberExprTypoRecovery(Expr *BE, CXXScopeSpec &SS, SourceLocation OpLoc,
+ bool IsArrow)
+ : BaseExpr(BE), SS(llvm::make_unique<CXXScopeSpec>(SS)),
+ OpLoc(OpLoc), IsArrow(IsArrow) {}
+
+ ExprResult operator()(Sema &SemaRef, TypoExpr *TE, TypoCorrection &TC,
+ Expr *Parent) override {
+ if (TC.isKeyword())
+ return ExprError();
+
+ LookupResult R(SemaRef, TC.getCorrection(), TC.getCorrectionRange().getBegin(),
+ TE->Consumer->getLookupResult().getLookupKind());
+ R.suppressDiagnostics();
+
+ QualType BaseType;
+ if (auto *DRE = dyn_cast<DeclRefExpr>(BaseExpr))
+ BaseType = DRE->getDecl()->getType();
+ else if (auto *CE = dyn_cast<CallExpr>(BaseExpr))
+ BaseType = CE->getCallReturnType();
+
+ CallExpr *CE = dyn_cast_or_null<CallExpr>(Parent);
+ if (CE && CE->getCallee() == TE && !BaseType.isNull()) {
+ auto Args = llvm::ArrayRef<Expr*>(CE->getArgs(), CE->getNumArgs());
+ OverloadCandidateSet CandidateSet(CE->getLocStart(),
+ OverloadCandidateSet::CSK_Normal);
+ for (NamedDecl *ND : TC) {
+ R.clear();
+ R.addDecl(ND);
+ R.resolveKind();
+ ExprResult MemberRef = SemaRef.BuildMemberReferenceExpr(
+ BaseExpr, BaseExpr->getType(), OpLoc, IsArrow, *SS,
+ SourceLocation(), nullptr, R, nullptr);
+ if (MemberRef.isInvalid())
+ break;
+ SemaRef.AddMethodCandidate(
+ DeclAccessPair::make(ND, AS_none), BaseType.getNonReferenceType(),
+ /*MemberRef.get()->Classify(SemaRef.Context)*/Expr::Classification::makeSimpleLValue(), Args, CandidateSet);
+ }
+ // Perform overload resolution.
+ OverloadCandidateSet::iterator Best;
+ auto result = CandidateSet.BestViableFunction(
+ SemaRef, CE->getLocStart(), Best);
+ switch (result) {
+ case OR_Success:
+ // Make sure both the TypoCorrection and the LookupResult only contain
+ // the correct decl.
+ TC.setCorrectionDecl(Best->Function);
+ R.clear();
+ R.addDecl(Best->Function);
+ break;
+
+ case OR_Ambiguous:
+ break;
+
+ case OR_No_Viable_Function:
+ case OR_Deleted:
+ return ExprError();
+ }
+ } else {
+ for (NamedDecl *ND : TC)
+ R.addDecl(ND);
+ }
+ R.resolveKind();
+ return SemaRef.BuildMemberReferenceExpr(
+ BaseExpr, BaseExpr->getType(), OpLoc, IsArrow, *SS, SourceLocation(),
+ nullptr, R, nullptr);
+ }
+};
+
+}
+
/// Look up the given member of the given non-type-dependent
/// expression. This can return in one of two ways:
/// * If it returns a sentinel null-but-valid result, the caller will
@@ -1210,13 +1340,16 @@ static ExprResult LookupMemberExpr(Sema &S, LookupResult &R,
// Handle field access to simple records.
if (const RecordType *RTy = BaseType->getAs<RecordType>()) {
- if (LookupMemberExprInRecord(S, R, BaseExpr.get()->getSourceRange(),
- RTy, OpLoc, SS, HasTemplateArgs))
+ TypoExpr *TE = nullptr;
+ if (LookupMemberExprInRecord(S, R, BaseExpr.get()->getSourceRange(), RTy,
+ OpLoc, SS, HasTemplateArgs, &TE,
+ llvm::make_unique<MemberExprTypoRecovery>(
+ BaseExpr.get(), SS, OpLoc, IsArrow)))
return ExprError();
// Returning valid-but-null is how we indicate to the caller that
// the lookup result was filled in.
- return ExprResult((Expr *)nullptr);
+ return TE ? ExprResult(TE) : ExprResult((Expr *)nullptr);
}
// Handle ivar access to Objective-C objects.
diff --git a/test/SemaCXX/arrow-operator.cpp b/test/SemaCXX/arrow-operator.cpp
index 173ff72..3e32a6b 100644
--- a/test/SemaCXX/arrow-operator.cpp
+++ b/test/SemaCXX/arrow-operator.cpp
@@ -52,14 +52,15 @@ class wrapped_ptr {
class Worker {
public:
- void DoSomething();
+ void DoSomething(); // expected-note {{'DoSomething' declared here}}
void Chuck();
};
void test() {
wrapped_ptr<Worker> worker(new Worker);
worker.DoSomething(); // expected-error {{no member named 'DoSomething' in 'arrow_suggest::wrapped_ptr<arrow_suggest::Worker>'; did you mean to use '->' instead of '.'?}}
- worker.DoSamething(); // expected-error {{no member named 'DoSamething' in 'arrow_suggest::wrapped_ptr<arrow_suggest::Worker>'}}
+ worker.DoSamething(); // expected-error {{no member named 'DoSamething' in 'arrow_suggest::wrapped_ptr<arrow_suggest::Worker>'; did you mean to use '->' instead of '.'?}} \
+ // expected-error {{no member named 'DoSamething' in 'arrow_suggest::Worker'; did you mean 'DoSomething'?}}
worker.Chuck(); // expected-error {{no member named 'Chuck' in 'arrow_suggest::wrapped_ptr<arrow_suggest::Worker>'; did you mean 'Check'?}}
}
diff --git a/test/SemaCXX/typo-correction-delayed.cpp b/test/SemaCXX/typo-correction-delayed.cpp
new file mode 100644
index 0000000..6659f62
--- /dev/null
+++ b/test/SemaCXX/typo-correction-delayed.cpp
@@ -0,0 +1,32 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wno-c++11-extensions %s
+
+struct A {};
+struct B {};
+struct D {
+ A fizbin; // expected-note 2 {{declared here}}
+ A foobar; // expected-note 2 {{declared here}}
+ B roxbin; // expected-note 2 {{declared here}}
+ B toobad; // expected-note 2 {{declared here}}
+ void BooHoo();
+ void FoxBox();
+};
+
+void something(A, B);
+void test() {
+ D obj;
+ something(obj.fixbin, // expected-error {{did you mean 'fizbin'?}}
+ obj.toobat); // expected-error {{did you mean 'toobad'?}}
+ something(obj.toobat, // expected-error {{did you mean 'foobar'?}}
+ obj.fixbin); // expected-error {{did you mean 'roxbin'?}}
+ something(obj.fixbin, // expected-error {{did you mean 'fizbin'?}}
+ obj.fixbin); // expected-error {{did you mean 'roxbin'?}}
+ something(obj.toobat, // expected-error {{did you mean 'foobar'?}}
+ obj.toobat); // expected-error {{did you mean 'toobad'?}}
+ // Both members could be corrected to methods, but that isn't valid.
+ something(obj.boohoo, // expected-error-re {{no member named 'boohoo' in 'D'{{$}}}}
+ obj.foxbox); // expected-error-re {{no member named 'foxbox' in 'D'{{$}}}}
+ // The first argument has a usable correction but the second doesn't.
+ something(obj.boobar, // expected-error-re {{no member named 'boobar' in 'D'{{$}}}}
+ obj.foxbox); // expected-error-re {{no member named 'foxbox' in 'D'{{$}}}}
+}
+
diff --git a/test/SemaCXX/typo-correction-pt2.cpp b/test/SemaCXX/typo-correction-pt2.cpp
index 88a7073..57d4d5b 100644
--- a/test/SemaCXX/typo-correction-pt2.cpp
+++ b/test/SemaCXX/typo-correction-pt2.cpp
@@ -28,7 +28,7 @@ struct A {
};
struct B : A {
using A::CreateFoo;
- void CreateFoo(int, int);
+ void CreateFoo(int, int); // expected-note {{'CreateFoo' declared here}}
};
void f(B &x) {
x.Createfoo(0,0); // expected-error {{no member named 'Createfoo' in 'PR13387::B'; did you mean 'CreateFoo'?}}
diff --git a/test/SemaCXX/typo-correction.cpp b/test/SemaCXX/typo-correction.cpp
index e8160b0..a4f5174 100644
--- a/test/SemaCXX/typo-correction.cpp
+++ b/test/SemaCXX/typo-correction.cpp
@@ -247,7 +247,7 @@ namespace b6956809_test1 {
struct S1 {
void method(A*); // no note here
- void method(B*);
+ void method(B*); // expected-note{{'method' declared here}}
};
void test1() {
@@ -258,15 +258,15 @@ namespace b6956809_test1 {
struct S2 {
S2();
- void method(A*) const; // expected-note{{candidate function not viable}}
+ void method(A*) const;
private:
- void method(B*); // expected-note{{candidate function not viable}}
+ void method(B*);
};
void test2() {
B b;
const S2 s;
- s.methodd(&b); // expected-error{{no member named 'methodd' in 'b6956809_test1::S2'; did you mean 'method'}} expected-error{{no matching member function for call to 'method'}}
+ s.methodd(&b); // expected-error-re{{no member named 'methodd' in 'b6956809_test1::S2'{{$}}}}
}
}
@@ -274,7 +274,7 @@ namespace b6956809_test2 {
template<typename T> struct Err { typename T::error n; }; // expected-error{{type 'void *' cannot be used prior to '::' because it has no members}}
struct S {
template<typename T> typename Err<T>::type method(T); // expected-note{{in instantiation of template class 'b6956809_test2::Err<void *>' requested here}}
- template<typename T> int method(T *);
+ template<typename T> int method(T *); // expected-note{{'method' declared here}}
};
void test() {
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