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Factor building of CXXDefaultArgExpr expressions out into a separate function. 

llvm-svn: 79974
This commit is contained in:
Anders Carlsson 2009-08-25 03:49:14 +00:00
parent 94ec649b33
commit 355933d096
2 changed files with 65 additions and 52 deletions
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6
clang/lib/Sema/Sema.h
View File

@ -1763,6 +1763,12 @@ public:
bool Elidable,
Expr **Exprs, unsigned NumExprs);
/// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
/// the default expr if needed.
OwningExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc,
FunctionDecl *FD,
ParmVarDecl *Param);
/// FinalizeVarWithDestructor - Prepare for calling destructor on the
/// constructed variable.
void FinalizeVarWithDestructor(VarDecl *VD, QualType DeclInitType);

111
clang/lib/Sema/SemaExpr.cpp
View File

@ -2429,6 +2429,57 @@ Sema::ActOnMemberReferenceExpr(Scope *S, ExprArg Base, SourceLocation OpLoc,
return ExprError();
}
Sema::OwningExprResult Sema::BuildCXXDefaultArgExpr(SourceLocation CallLoc,
FunctionDecl *FD,
ParmVarDecl *Param) {
if (Param->hasUnparsedDefaultArg()) {
Diag (CallLoc,
diag::err_use_of_default_argument_to_function_declared_later) <<
FD << cast<CXXRecordDecl>(FD->getDeclContext())->getDeclName();
Diag(UnparsedDefaultArgLocs[Param],
diag::note_default_argument_declared_here);
} else {
if (Param->hasUninstantiatedDefaultArg()) {
Expr *UninstExpr = Param->getUninstantiatedDefaultArg();
// Instantiate the expression.
const TemplateArgumentList &ArgList = getTemplateInstantiationArgs(FD);
// FIXME: We should really make a new InstantiatingTemplate ctor
// that has a better message - right now we're just piggy-backing
// off the "default template argument" error message.
InstantiatingTemplate Inst(*this, CallLoc, FD->getPrimaryTemplate(),
ArgList.getFlatArgumentList(),
ArgList.flat_size());
OwningExprResult Result = InstantiateExpr(UninstExpr, ArgList);
if (Result.isInvalid())
return ExprError();
if (SetParamDefaultArgument(Param, move(Result),
/*FIXME:EqualLoc*/
UninstExpr->getSourceRange().getBegin()))
return ExprError();
}
Expr *DefaultExpr = Param->getDefaultArg();
// If the default expression creates temporaries, we need to
// push them to the current stack of expression temporaries so they'll
// be properly destroyed.
if (CXXExprWithTemporaries *E
= dyn_cast_or_null<CXXExprWithTemporaries>(DefaultExpr)) {
assert(!E->shouldDestroyTemporaries() &&
"Can't destroy temporaries in a default argument expr!");
for (unsigned I = 0, N = E->getNumTemporaries(); I != N; ++I)
ExprTemporaries.push_back(E->getTemporary(I));
}
}
// We already type-checked the argument, so we know it works.
return Owned(CXXDefaultArgExpr::Create(Context, Param));
}
/// ConvertArgumentsForCall - Converts the arguments specified in
/// Args/NumArgs to the parameter types of the function FDecl with
/// function prototype Proto. Call is the call expression itself, and
@ -2493,60 +2544,16 @@ Sema::ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
return true;
} else {
ParmVarDecl *Param = FDecl->getParamDecl(i);
if (Param->hasUnparsedDefaultArg()) {
Diag (Call->getSourceRange().getBegin(),
diag::err_use_of_default_argument_to_function_declared_later) <<
FDecl << cast<CXXRecordDecl>(FDecl->getDeclContext())->getDeclName();
Diag(UnparsedDefaultArgLocs[Param],
diag::note_default_argument_declared_here);
} else {
if (Param->hasUninstantiatedDefaultArg()) {
Expr *UninstExpr = Param->getUninstantiatedDefaultArg();
// Instantiate the expression.
const TemplateArgumentList &ArgList =
getTemplateInstantiationArgs(FDecl);
// FIXME: We should really make a new InstantiatingTemplate ctor
// that has a better message - right now we're just piggy-backing
// off the "default template argument" error message.
InstantiatingTemplate Inst(*this, Call->getSourceRange().getBegin(),
FDecl->getPrimaryTemplate(),
ArgList.getFlatArgumentList(),
ArgList.flat_size());
OwningExprResult Result
= InstantiateExpr(UninstExpr,
getTemplateInstantiationArgs(FDecl));
if (Result.isInvalid())
return true;
if (SetParamDefaultArgument(Param, move(Result),
/*FIXME:EqualLoc*/
UninstExpr->getSourceRange().getBegin()))
return true;
}
Expr *DefaultExpr = Param->getDefaultArg();
// If the default expression creates temporaries, we need to
// push them to the current stack of expression temporaries so they'll
// be properly destroyed.
if (CXXExprWithTemporaries *E
= dyn_cast_or_null<CXXExprWithTemporaries>(DefaultExpr)) {
assert(!E->shouldDestroyTemporaries() &&
"Can't destroy temporaries in a default argument expr!");
for (unsigned I = 0, N = E->getNumTemporaries(); I != N; ++I)
ExprTemporaries.push_back(E->getTemporary(I));
}
}
// We already type-checked the argument, so we know it works.
Arg = CXXDefaultArgExpr::Create(Context, Param);
OwningExprResult ArgExpr =
BuildCXXDefaultArgExpr(Call->getSourceRange().getBegin(),
FDecl, Param);
if (ArgExpr.isInvalid())
return true;
Arg = ArgExpr.takeAs<Expr>();
}
QualType ArgType = Arg->getType();
Call->setArg(i, Arg);
}