[cfe-dev] Missing info from TypeLoc?

[Vane, Edwin]

It occurred to me that perhaps the best way to handle my problem is just to get the type info of the Decl from looking at Type hierarchy and just replace the whole declaration specifier instead of trying to replace parts of it. As Manuel pointed out earlier, things like function pointer and member pointer types will break with TypeLoc because the identifier is buried in the type definition.

From: cfe-dev-bounces at cs.uiuc.edu [mailto:cfe-dev-bounces at cs.uiuc.edu] On Behalf Of Vane, Edwin
Sent: Thursday, March 14, 2013 12:00 AM
To: Richard Smith
Cc: Clang Dev List (cfe-dev at cs.uiuc.edu)
Subject: Re: [cfe-dev] Missing info from TypeLoc?

I'm writing a tool to replace some part of the declaration with the 'auto' type specifier in the specific instance where a CXXNewExpr is the initializer. So like:

MyType *a = new MyType()

My problem is the handling of odd cases like:

Const MyType *a = new MyType();       -> const auto *a = new MyType();
Const MyType *a = new const MyType();  -> auto a = new const MyType();
Mytype * const a = new MyType(); -> const auto a = new MyType();
// And so on

Really what I need is a way of locating the cv-qualifier and what it applies to so I can replace as much or as little with 'auto' as necessary. I was using TypeLoc to get the location information for the replacement but I need something more complex now.

From: metafoo at gmail.com<mailto:metafoo at gmail.com> [mailto:metafoo at gmail.com] On Behalf Of Richard Smith
Sent: Wednesday, March 13, 2013 4:04 PM
To: Vane, Edwin
Cc: Clang Dev List (cfe-dev at cs.uiuc.edu<mailto:cfe-dev at cs.uiuc.edu>)
Subject: Re: [cfe-dev] Missing info from TypeLoc?

On Wed, Mar 13, 2013 at 6:27 AM, Vane, Edwin <edwin.vane at intel.com<mailto:edwin.vane at intel.com>> wrote:
Is there an API I can re-use to parse the specifiers or at least get me part of the way toward what I need?

What is it that you need? :)

From: metafoo at gmail.com<mailto:metafoo at gmail.com> [mailto:metafoo at gmail.com<mailto:metafoo at gmail.com>] On Behalf Of Richard Smith
Sent: Tuesday, March 12, 2013 7:01 PM
To: Vane, Edwin
Cc: Clang Dev List (cfe-dev at cs.uiuc.edu<mailto:cfe-dev at cs.uiuc.edu>)
Subject: Re: [cfe-dev] Missing info from TypeLoc?

On Tue, Mar 12, 2013 at 12:28 PM, Vane, Edwin <edwin.vane at intel.com<mailto:edwin.vane at intel.com>> wrote:
Hi all,

Given this c++ code:

const MyType *a;

The TypeSourceInfo from the VarDecl provides a TypeLoc that claims the type starts at "MyType" not "const". Is this by design or is there a bug here?

QualifiedTypeLoc does not store location information for the type qualifiers. This is "intentional" but clearly not ideal for tooling clients of type location information. Since the decl-specifiers for such a declaration can be in any order, the source range for such a type isn't necessarily going to be useful, and you may be able to get the information you're looking for by just looking at the start location of the Decl.

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