================
@@ -289,74 +297,72 @@ void UnnecessaryCopyInitialization::check(
// instantiations where the types differ and rely on implicit conversion
would
// no longer compile if we switched to a reference.
if (differentReplacedTemplateParams(
- NewVar->getType(), constructorArgumentType(OldVar, Result.Nodes),
+ Context.Var.getType(), constructorArgumentType(OldVar, Result.Nodes),
*Result.Context))
return;
if (OldVar == nullptr) {
- handleCopyFromMethodReturn(*NewVar, *BlockStmt, *Stmt, IssueFix, ObjectArg,
- *Result.Context);
+ // `auto NewVar = functionCall();`
+ handleCopyFromMethodReturn(Context, ObjectArg);
} else {
- handleCopyFromLocalVar(*NewVar, *OldVar, *BlockStmt, *Stmt, IssueFix,
- *Result.Context);
+ // `auto NewVar = OldVar;`
+ handleCopyFromLocalVar(Context, *OldVar);
}
}
void UnnecessaryCopyInitialization::handleCopyFromMethodReturn(
- const VarDecl &Var, const Stmt &BlockStmt, const DeclStmt &Stmt,
- bool IssueFix, const VarDecl *ObjectArg, ASTContext &Context) {
- bool IsConstQualified = Var.getType().isConstQualified();
- if (!IsConstQualified && !isOnlyUsedAsConst(Var, BlockStmt, Context))
+ const CheckContext &Ctx, const VarDecl *ObjectArg) {
+ bool IsConstQualified = Ctx.Var.getType().isConstQualified();
+ if (!IsConstQualified && !Ctx.IsVarOnlyUsedAsConst)
return;
if (ObjectArg != nullptr &&
- !isInitializingVariableImmutable(*ObjectArg, BlockStmt, Context,
+ !isInitializingVariableImmutable(*ObjectArg, Ctx.BlockStmt, Ctx.ASTCtx,
ExcludedContainerTypes))
return;
- if (isVariableUnused(Var, BlockStmt, Context)) {
- auto Diagnostic =
- diag(Var.getLocation(),
- "the %select{|const qualified }0variable %1 is copy-constructed "
- "from a const reference but is never used; consider "
- "removing the statement")
- << IsConstQualified << &Var;
- if (IssueFix)
- recordRemoval(Stmt, Context, Diagnostic);
- } else {
- auto Diagnostic =
- diag(Var.getLocation(),
- "the %select{|const qualified }0variable %1 is copy-constructed "
- "from a const reference%select{ but is only used as const "
- "reference|}0; consider making it a const reference")
- << IsConstQualified << &Var;
- if (IssueFix)
- recordFixes(Var, Context, Diagnostic);
- }
+ diagnoseCopyFromMethodReturn(Ctx);
}
void UnnecessaryCopyInitialization::handleCopyFromLocalVar(
- const VarDecl &NewVar, const VarDecl &OldVar, const Stmt &BlockStmt,
- const DeclStmt &Stmt, bool IssueFix, ASTContext &Context) {
- if (!isOnlyUsedAsConst(NewVar, BlockStmt, Context) ||
- !isInitializingVariableImmutable(OldVar, BlockStmt, Context,
+ const CheckContext &Ctx, const VarDecl &OldVar) {
+ if (!Ctx.IsVarOnlyUsedAsConst ||
+ !isInitializingVariableImmutable(OldVar, Ctx.BlockStmt, Ctx.ASTCtx,
ExcludedContainerTypes))
return;
+ diagnoseCopyFromLocalVar(Ctx, OldVar);
+}
- if (isVariableUnused(NewVar, BlockStmt, Context)) {
- auto Diagnostic = diag(NewVar.getLocation(),
- "local copy %0 of the variable %1 is never modified
"
- "and never used; "
- "consider removing the statement")
- << &NewVar << &OldVar;
- if (IssueFix)
- recordRemoval(Stmt, Context, Diagnostic);
- } else {
- auto Diagnostic =
- diag(NewVar.getLocation(),
- "local copy %0 of the variable %1 is never modified; "
- "consider avoiding the copy")
- << &NewVar << &OldVar;
- if (IssueFix)
- recordFixes(NewVar, Context, Diagnostic);
+void UnnecessaryCopyInitialization::diagnoseCopyFromMethodReturn(
+ const CheckContext &Ctx) {
+ auto Diagnostic =
+ diag(Ctx.Var.getLocation(),
+ "the %select{|const qualified }0variable %1 is "
+ "copy-constructed "
+ "from a const reference%select{%select{ but is only used as const "
+ "reference|}0| but is never used}2; consider "
+ "%select{making it a const reference|removing the statement}2")
+ << Ctx.Var.getType().isConstQualified() << &Ctx.Var << Ctx.IsVarUnused;
+ maybeIssueFixes(Ctx, Diagnostic);
+}
+
+void UnnecessaryCopyInitialization::diagnoseCopyFromLocalVar(
+ const CheckContext &Ctx, const VarDecl &OldVar) {
+ auto Diagnostic =
+ diag(Ctx.Var.getLocation(),
+ "local copy %1 of the variable %0 is never modified%select{"
+ "| and never used}2; consider %select{avoiding the copy|removing "
+ "the statement}2")
+ << &OldVar << &Ctx.Var << Ctx.IsVarUnused;
+ maybeIssueFixes(Ctx, Diagnostic);
+}
+
+void UnnecessaryCopyInitialization::maybeIssueFixes(
+ const CheckContext &Ctx, DiagnosticBuilder &Diagnostic) {
+ if (Ctx.IssueFix) {
+ if (Ctx.IsVarUnused) {
----------------
PiotrZSL wrote:
no need for extra {}
https://github.com/llvm/llvm-project/pull/73921
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