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/*
* Copyright (c) 2012-2021 Stephen Williams (steve@icarus.com)
* Copyright CERN 2013 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include <cstdarg>
# include "pform.h"
# include "PPackage.h"
# include "parse_misc.h"
# include "parse_api.h"
# include <map>
# include <sstream>
# include "ivl_assert.h"
using namespace std;
/*
* This is a list of packages in the order that they were defined.
*/
vector<PPackage*> pform_packages;
/*
* This allows us to easily check for name collisions.
*/
static map<perm_string,PPackage*> packages_by_name;
static PPackage*pform_cur_package = 0;
void pform_start_package_declaration(const struct vlltype&loc, const char*name,
LexicalScope::lifetime_t lifetime)
{
ivl_assert(loc, pform_cur_package == 0);
perm_string use_name = lex_strings.make(name);
PPackage*pkg_scope = pform_push_package_scope(loc, use_name, lifetime);
FILE_NAME(pkg_scope, loc);
pform_cur_package = pkg_scope;
}
void pform_end_package_declaration(const struct vlltype&loc)
{
ivl_assert(loc, pform_cur_package);
perm_string use_name = pform_cur_package->pscope_name();
map<perm_string,PPackage*>::const_iterator test = packages_by_name.find(use_name);
if (test != packages_by_name.end()) {
ostringstream msg;
msg << "error: Package " << use_name << " was already declared here: "
<< test->second->get_fileline() << ends;
VLerror(loc, "%s", msg.str().c_str());
}
packages_by_name[use_name] = pform_cur_package;
pform_packages.push_back(pform_cur_package);
pform_cur_package = 0;
pform_pop_scope();
}
/*
* Do the import early, during processing. This requires that the
* package is declared in pform ahead of time (it is) and that we can
* simply transfer definitions to the current scope (we can).
*/
void pform_package_import(const struct vlltype&loc, PPackage*pkg, const char*ident)
{
LexicalScope*scope = pform_peek_scope();
if (ident) {
perm_string use_ident = lex_strings.make(ident);
// Check that the requested symbol is available.
map<perm_string,PNamedItem*>::const_iterator cur_sym
= pkg->local_symbols.find(use_ident);
if (cur_sym == pkg->local_symbols.end()) {
cerr << loc.get_fileline() << ": error: "
"'" << use_ident << "' is not exported by '"
<< pkg->pscope_name() << "'." << endl;
error_count += 1;
return;
}
// Check for conflict with local symbol.
cur_sym = scope->local_symbols.find(use_ident);
if (cur_sym != scope->local_symbols.end()) {
cerr << loc.get_fileline() << ": error: "
"'" << use_ident << "' has already been declared "
"in this scope." << endl;
cerr << cur_sym->second->get_fileline() << ": : "
"It was declared here as "
<< cur_sym->second->symbol_type() << "." << endl;
error_count += 1;
return;
}
// Check for conflict with previous import.
map<perm_string,PPackage*>::const_iterator cur_pkg
= scope->explicit_imports.find(use_ident);
if (cur_pkg != scope->explicit_imports.end()) {
if (cur_pkg->second != pkg) {
cerr << loc.get_fileline() << ": error: "
"'" << use_ident << "' has already been "
"imported into this scope from package '"
<< cur_pkg->second->pscope_name() << "'." << endl;
error_count += 1;
}
return;
}
scope->explicit_imports[use_ident] = pkg;
} else {
list<PPackage*>::const_iterator cur_pkg
= find(scope->potential_imports.begin(),
scope->potential_imports.end(),
pkg);
if (cur_pkg == scope->potential_imports.end())
scope->potential_imports.push_back(pkg);
}
}
PExpr* pform_package_ident(const struct vlltype&loc,
PPackage*pkg, pform_name_t*ident_name)
{
assert(ident_name);
PEIdent*tmp = new PEIdent(pkg, *ident_name);
FILE_NAME(tmp, loc);
return tmp;
}
typedef_t* pform_test_type_identifier(PPackage*pkg, const char*txt)
{
perm_string use_name = lex_strings.make(txt);
LexicalScope::typedef_map_t::const_iterator cur;
cur = pkg->typedefs.find(use_name);
if (cur != pkg->typedefs.end())
return cur->second;
return 0;
}
/*
* The lexor uses this function to know if the identifier names the
* package. It will call this a PACKAGE_IDENTIFIER token in that case,
* instead of a generic IDENTIFIER.
*/
PPackage* pform_test_package_identifier(const char*pkg_name)
{
perm_string use_name = lex_strings.make(pkg_name);
map<perm_string,PPackage*>::const_iterator pcur = packages_by_name.find(use_name);
if (pcur == packages_by_name.end())
return 0;
assert(pcur->second);
return pcur->second;
}
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