The AST tree modification. Edited.

[niXman]

Hello.
"lang_hooks" - what this? where is declared?
Thanks!


2011/10/5 Iyer, Balaji V <balaji.v.iyer@intel.com>
>
> Hello,
>        For most of the things you are looking for, please look for a function called build_decl. It is used in several places inside GCC. Let me give you a small example,
>
> If you do the following:
>
> tree x = build_decl (UNKNOWN_LOCATION, VAR_DECL, get_identifer("ii"), integer_type_node)
>
> you will declare a variable called "ii" of type "integer."
>
> Similarly, to create a new internal structure, if do something like this:
>
> tree struct_frame = lang_hooks.make_type (RECORD_TYPE);
> tree struct_field = build_decl (UNKNOWN_LOCATION, FIELD_DECL, get_identifier("variable"), integer_type_node)
> TREE_CHAIN(struct_field) = struct_frame
>
> You will create the following internal structure
>
> struct {
>   int variable;
> }
>
> I hope this helps you get started.
>
> Thanks,
>
> Balaji V .Iyer.
>
> -----Original Message-----
> From: niXman [mailto:i.nixman@gmail.com]
> Sent: Monday, October 03, 2011 6:51 PM
> To: gcc@gcc.gnu.org
> Subject: The AST tree modification. Edited.
>
> Hi everybody!
> It is necessary to implement a plug-in for GCC designed to collect the information on types of translation unit, and generate static const array of types rtti_ex _ on its base;  //////////////////////////////////////
> enum class type_ {
>   char_, uchar_, short_, ushort_, int_, uint_, long_, ulong_,
>   int64_, uint64_, array_, pointer_, double_, long_double_, float_,
>   class_
> };
>
> struct rtti_ex_ { // <<<<<<<<<<<<<<<<<<<<<<<<<
>   const char* name;
>   const type_ type;
>   const size_t size;
>   const size_t align;
>   const size_t offset;
> };
>
> // generated from plugin.
> static const rtti_ex_ rtti_ex_array_[] = {
>   {...},
>   {...},
>   {...}
> };
> /////////////////////////////////////
>
> There aren't any problems with information collection from AST. There is a complexity with AST modification:
> 1. How to declare a variable?
> 2. How to declare the typedef?
> 3. How to declare a structure?
> 4. How to declare an array of structures?
> I suppose that there should be a function like: tree make_subtree (const char* source); which result I could insert in the corresponding node. But I haven't found it.
>
> Please, give me some links on this subject. It is very desirable, if you could give some links with examples.
>
> Thanks.