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#ifndef __pform_types_H
#define __pform_types_H
/*
* Copyright (c) 2007-2008 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
// This for the perm_string type.
# include "StringHeap.h"
# include <iostream>
# include <list>
/*
* parse-form types.
*/
struct index_component_t {
enum ctype_t { SEL_NONE, SEL_BIT, SEL_PART, SEL_IDX_UP, SEL_IDX_DO };
index_component_t() : sel(SEL_NONE), msb(0), lsb(0) { };
~index_component_t() { }
ctype_t sel;
class PExpr*msb;
class PExpr*lsb;
};
struct name_component_t {
explicit name_component_t(perm_string n) : name(n) { }
~name_component_t() { }
perm_string name;
std::list<index_component_t>index;
};
/*
* The pform_name_t is the general form for a hierarchical
* identifier. It is an ordered list of name components. Each name
* component is an identifier and an optional list of bit/part
* selects. The simplest name component is a simple identifier:
*
* foo
*
* The bit/part selects come from the source and are made part of the
* name component. A bit select is a single number that may be a bit
* select of a vector or a word select of an array:
*
* foo[5] -- a bit select/word index
* foo[6:4] -- a part select
*
* The index components of a name component are collected into an
* ordered list, so there may be many, for example:
*
* foo[5][6:4] -- a part select of an array word
*
* The pform_name_t, then, is an ordered list of these name
* components. The list of names comes from a hierarchical name in the
* source, like this:
*
* foo[5].bar[6:4] -- a part select of a vector in sub-scope foo[5].
*/
typedef std::list<name_component_t> pform_name_t;
inline perm_string peek_head_name(const pform_name_t&that)
{
return that.front().name;
}
inline perm_string peek_tail_name(const pform_name_t&that)
{
return that.back().name;
}
extern std::ostream& operator<< (std::ostream&out, const pform_name_t&);
extern std::ostream& operator<< (std::ostream&out, const name_component_t&that);
extern std::ostream& operator<< (std::ostream&out, const index_component_t&that);
#endif
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