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| author | Douglas Gregor <dgregor@apple.com> | 2008-11-19 15:42:04 +0000 |
|---|---|---|
| committer | Douglas Gregor <dgregor@apple.com> | 2008-11-19 15:42:04 +0000 |
| commit | 74253736184c0717a0649922551bf9d8b6815651 (patch) | |
| tree | 49fde4054461edd0563407010d0c4619e2c7e8fa /lib/AST/Expr.cpp | |
| parent | 08b2c3743a29a2dddcf72e95f747760e213cdde7 (diff) | |
Added operator overloading for unary operators, post-increment, and
post-decrement, including support for generating all of the built-in
operator candidates for these operators.
C++ and C have different rules for the arguments to the builtin unary
'+' and '-'. Implemented both variants in Sema::ActOnUnaryOp.
In C++, pre-increment and pre-decrement return lvalues. Update
Expr::isLvalue accordingly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59638 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/AST/Expr.cpp')
| -rw-r--r-- | lib/AST/Expr.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp index 49a4d77783..a179af8b14 100644 --- a/lib/AST/Expr.cpp +++ b/lib/AST/Expr.cpp @@ -398,6 +398,11 @@ Expr::isLvalueResult Expr::isLvalue(ASTContext &Ctx) const { cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Imag || cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Extension) return cast<UnaryOperator>(this)->getSubExpr()->isLvalue(Ctx); // GNU. + + if (Ctx.getLangOptions().CPlusPlus && // C++ [expr.pre.incr]p1 + (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreInc || + cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreDec)) + return LV_Valid; break; case ImplicitCastExprClass: return cast<ImplicitCastExpr>(this)->isLvalueCast()? LV_Valid |