AST representation for user-defined literals, plus just enough of semantic
analysis to make the AST representation testable. They are represented by a
new UserDefinedLiteral AST node, which is a sugared CallExpr. All semantic
properties, including full CodeGen support, are achieved for free by this
representation.
UserDefinedLiterals can never be dependent, so no custom instantiation
behavior is required. They are mangled as if they were direct calls to the
underlying literal operator. This matches g++'s apparent behavior (but not its
actual mangling, which is broken for literal-operator-ids).
User-defined *string* literals are now fully-operational, but the semantic
analysis is quite hacky and needs more work. No other forms of user-defined
literal are created yet, but the AST support for them is present.
This patch committed after midnight because we had already hit the quota for
new kinds of literal yesterday.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152211 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index e35091a..0fdca5a 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1681,7 +1681,8 @@
// Fallthrough for generic call handling.
}
case CallExprClass:
- case CXXMemberCallExprClass: {
+ case CXXMemberCallExprClass:
+ case UserDefinedLiteralClass: {
// If this is a direct call, get the callee.
const CallExpr *CE = cast<CallExpr>(this);
if (const Decl *FD = CE->getCalleeDecl()) {
@@ -2014,7 +2015,8 @@
// exception-specification
case CallExprClass:
case CXXMemberCallExprClass:
- case CXXOperatorCallExprClass: {
+ case CXXOperatorCallExprClass:
+ case UserDefinedLiteralClass: {
const CallExpr *CE = cast<CallExpr>(this);
CanThrowResult CT;
if (isTypeDependent())
diff --git a/lib/AST/ExprCXX.cpp b/lib/AST/ExprCXX.cpp
index dc559f0..039d70c 100644
--- a/lib/AST/ExprCXX.cpp
+++ b/lib/AST/ExprCXX.cpp
@@ -624,6 +624,39 @@
return new (Buffer) CXXFunctionalCastExpr(EmptyShell(), PathSize);
}
+UserDefinedLiteral::LiteralOperatorKind
+UserDefinedLiteral::getLiteralOperatorKind() const {
+ if (getNumArgs() == 0)
+ return LOK_Template;
+ if (getNumArgs() == 2)
+ return LOK_String;
+
+ assert(getNumArgs() == 1 && "unexpected #args in literal operator call");
+ QualType ParamTy =
+ cast<FunctionDecl>(getCalleeDecl())->getParamDecl(0)->getType();
+ if (ParamTy->isPointerType())
+ return LOK_Raw;
+ if (ParamTy->isAnyCharacterType())
+ return LOK_Character;
+ if (ParamTy->isIntegerType())
+ return LOK_Integer;
+ if (ParamTy->isFloatingType())
+ return LOK_Floating;
+
+ llvm_unreachable("unknown kind of literal operator");
+}
+
+Expr *UserDefinedLiteral::getCookedLiteral() {
+#ifndef NDEBUG
+ LiteralOperatorKind LOK = getLiteralOperatorKind();
+ assert(LOK != LOK_Template && LOK != LOK_Raw && "not a cooked literal");
+#endif
+ return getArg(0);
+}
+
+const IdentifierInfo *UserDefinedLiteral::getUDSuffix() const {
+ return cast<FunctionDecl>(getCalleeDecl())->getLiteralIdentifier();
+}
CXXDefaultArgExpr *
CXXDefaultArgExpr::Create(ASTContext &C, SourceLocation Loc,
diff --git a/lib/AST/ExprClassification.cpp b/lib/AST/ExprClassification.cpp
index 693e28c..00160a0 100644
--- a/lib/AST/ExprClassification.cpp
+++ b/lib/AST/ExprClassification.cpp
@@ -269,6 +269,7 @@
case Expr::CallExprClass:
case Expr::CXXOperatorCallExprClass:
case Expr::CXXMemberCallExprClass:
+ case Expr::UserDefinedLiteralClass:
case Expr::CUDAKernelCallExprClass:
return ClassifyUnnamed(Ctx, cast<CallExpr>(E)->getCallReturnType());
diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index 08794f3..947f661 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -6243,6 +6243,7 @@
case Expr::CXXTypeidExprClass:
case Expr::CXXUuidofExprClass:
case Expr::CXXNullPtrLiteralExprClass:
+ case Expr::UserDefinedLiteralClass:
case Expr::CXXThisExprClass:
case Expr::CXXThrowExprClass:
case Expr::CXXNewExprClass:
diff --git a/lib/AST/ItaniumMangle.cpp b/lib/AST/ItaniumMangle.cpp
index ea6e8b2..c4eed7c 100644
--- a/lib/AST/ItaniumMangle.cpp
+++ b/lib/AST/ItaniumMangle.cpp
@@ -2439,6 +2439,9 @@
Arity);
break;
+ case Expr::UserDefinedLiteralClass:
+ // We follow g++'s approach of mangling a UDL as a call to the literal
+ // operator.
case Expr::CXXMemberCallExprClass: // fallthrough
case Expr::CallExprClass: {
const CallExpr *CE = cast<CallExpr>(E);
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index cd8b6bb..b8e68d8 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -1222,6 +1222,31 @@
OS << ")";
}
+void StmtPrinter::VisitUserDefinedLiteral(UserDefinedLiteral *Node) {
+ switch (Node->getLiteralOperatorKind()) {
+ case UserDefinedLiteral::LOK_Raw:
+ OS << cast<StringLiteral>(Node->getArg(0))->getString();
+ break;
+ case UserDefinedLiteral::LOK_Template: {
+ DeclRefExpr *DRE = cast<DeclRefExpr>(Node->getCallee());
+ assert(DRE->hasExplicitTemplateArgs());
+ const TemplateArgumentLoc *Args = DRE->getTemplateArgs();
+ for (unsigned i = 0, e = DRE->getNumTemplateArgs(); i != e; ++i) {
+ char C = (char)Args[i].getArgument().getAsIntegral()->getZExtValue();
+ OS << C;
+ }
+ break;
+ }
+ case UserDefinedLiteral::LOK_Integer:
+ case UserDefinedLiteral::LOK_Floating:
+ case UserDefinedLiteral::LOK_String:
+ case UserDefinedLiteral::LOK_Character:
+ PrintExpr(Node->getCookedLiteral());
+ break;
+ }
+ OS << Node->getUDSuffix()->getName();
+}
+
void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
OS << (Node->getValue() ? "true" : "false");
}
diff --git a/lib/AST/StmtProfile.cpp b/lib/AST/StmtProfile.cpp
index 7935d6d..db27f82 100644
--- a/lib/AST/StmtProfile.cpp
+++ b/lib/AST/StmtProfile.cpp
@@ -738,6 +738,10 @@
VisitCXXNamedCastExpr(S);
}
+void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
+ VisitCallExpr(S);
+}
+
void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
VisitExpr(S);
ID.AddBoolean(S->getValue());