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// file : CCF/IDL3/SemanticAction/Impl/Component.hpp
// author : Boris Kolpackov <boris@dre.vanderbilt.edu>
// cvs-id : $id$
#ifndef CCF_IDL3_SEMANTIC_ACTION_IMPL_COMPONENT_HPP
#define CCF_IDL3_SEMANTIC_ACTION_IMPL_COMPONENT_HPP
#include "CCF/IDL3/SemanticAction/Component.hpp"
#include "CCF/IDL3/SemanticAction/Impl/Elements.hpp"
namespace CCF
{
namespace IDL3
{
namespace SemanticAction
{
namespace Impl
{
//
//
//
class Component :
public virtual SemanticAction::Component,
public virtual ScopeBase<SyntaxTree::ComponentDeclPtr>
{
public:
virtual
~Component () throw () {}
Component (bool trace, SyntaxTree::ScopePtr& scope)
: ScopeBase<SyntaxTree::ComponentDeclPtr> (scope),
trace_ (trace),
name_ (""),
inherits_ ("")
{
}
virtual void
begin (SimpleIdentifierPtr const& id)
{
if (trace_) cerr << "component " << id << endl;
name_ = SyntaxTree::SimpleName (id->lexeme ());
}
virtual void
inherits (IdentifierPtr const& id)
{
if (trace_) cerr << "inherits " << id << endl;
using namespace SyntaxTree;
Name name (id->lexeme ());
struct InheritancePredicate : public DeclarationTable::ResolvePredicate
{
struct IncompatibleType :
public DeclarationTable::ResolutionFailure
{
IncompatibleType (std::string const& t) : type (t) {}
std::string type;
};
virtual bool
test (DeclarationPtr const& d)
throw (IncompatibleType)
{
std::string type = d->declaration_class ();
if (type != "component") throw IncompatibleType (type);
return d->dynamic_type<TypeDecl> ()->defined ();
}
} p;
try
{
ScopedName sn = scope_->table ().resolve (
name,
scope_->name (),
scope_->peek_order (),
p);
inherits_ = sn;
}
catch (InheritancePredicate::IncompatibleType const& e)
{
cerr << "error: invalid inheritance specification" << endl;
cerr << "inheritance of ";
cerr << "component \'" << name_ <<"\' from "
<< e.type << " \'" << name << "\' is illegal" << endl;
}
catch (DeclarationTable::NameNotFound const&)
{
cerr << "error: invalid inheritance specification" << endl;
cerr << "no component with name \'"
<< name << "\' visible from scope \'"
<< scope_->name () << "\'" << endl;
}
catch (DeclarationTable::PredicateNotMet const&)
{
cerr << "error: invalid inheritance specification" << endl;
cerr << "no defined component with name \'"
<< name << "\' visible from scope \'"
<< scope_->name () << "\'" << endl;
cerr << "inheritance from forward-declared component is illegal"
<< endl;
}
}
virtual void
supports (IdentifierPtr const& id)
{
if (trace_) cerr << "supports " << id << endl;
using namespace SyntaxTree;
Name name (id->lexeme ());
struct SupportsPredicate :
public DeclarationTable::ResolvePredicate
{
struct IncompatibleType :
public DeclarationTable::ResolutionFailure
{
IncompatibleType (std::string const& t) : type (t) {}
std::string type;
};
virtual bool
test (DeclarationPtr const& d)
throw (IncompatibleType)
{
std::string type = d->declaration_class ();
// Spec doesn't say anything about which interfaces
// component can support.
if (type != "unconstrained interface")
throw IncompatibleType (type);
return d->dynamic_type<TypeDecl> ()->defined ();
}
} p;
try
{
ScopedName sn = scope_->table ().resolve (
name,
scope_->name (),
scope_->peek_order (),
p);
if (supports_.insert (sn).second == false)
{
cerr << "error: invalid support specification" << endl;
cerr << "directly supporting interface \'"
<< sn << "\' more than once is illegal" << endl;
}
}
catch (SupportsPredicate::IncompatibleType const& e)
{
cerr << "error: invalid support specification" << endl;
cerr << "specifying " << e.type << " \'" << name
<< "\' in component\'s support clause is illegal"
<< endl;
}
catch (DeclarationTable::NameNotFound const&)
{
cerr << "error: invalid support specification" << endl;
cerr << "no interface with name \'"
<< name << "\' visible from scope \'"
<< scope_->name () << "\'" << endl;
}
catch (DeclarationTable::PredicateNotMet const&)
{
cerr << "error: invalid support specification" << endl;
cerr << "no defined interface with name \'"
<< name << "\' visible from scope \'"
<< scope_->name () << "\'" << endl;
cerr << "supporting forward-declared interface is illegal"
<< endl;
}
}
virtual void
open_scope ()
{
using namespace SyntaxTree;
ComponentDefPtr def;
if (inherits_ == ScopedName (""))
{
def = ComponentDefPtr (new ComponentDef (
name_,
scope_,
supports_));
}
else
{
def = ComponentDefPtr (new ComponentDef (
name_,
scope_,
inherits_,
supports_));
}
scope_->insert (def);
push (def);
scope_ = def;
name_ = SimpleName (""); //indicate that we are done
inherits_ = ScopedName ("");
supports_.clear ();
}
virtual void
close_scope ()
{
scope_ = scope_->scope ();
}
virtual void
end ()
{
if (trace_) cerr << "end" << endl;
using namespace SyntaxTree;
if (name_ != SimpleName (""))
{
ComponentDeclPtr decl (new ComponentForwardDecl (name_, scope_));
scope_->insert (decl);
}
else
{
pop ();
}
}
private:
bool trace_;
SyntaxTree::SimpleName name_;
SyntaxTree::ScopedName inherits_;
SyntaxTree::ScopedNameSet supports_;
};
}
}
}
}
#endif // CCF_IDL3_SEMANTIC_ACTION_IMPL_COMPONENT_HPP
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