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//
// $Id$
//
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// union_ch.cpp
//
// = DESCRIPTION
// Visitor generating code for Unions in the client header
//
// = AUTHOR
// Aniruddha Gokhale
//
// ============================================================================
#include "idl.h"
#include "idl_extern.h"
#include "be.h"
#include "be_visitor_union.h"
ACE_RCSID(be_visitor_union, union_ch, "$Id$")
// ******************************************************
// for client header
// ******************************************************
be_visitor_union_ch::be_visitor_union_ch (be_visitor_context *ctx)
: be_visitor_union (ctx)
{
}
be_visitor_union_ch::~be_visitor_union_ch (void)
{
}
// visit the Union node and its scope
int be_visitor_union_ch::visit_union (be_union *node)
{
TAO_OutStream *os; // output stream
be_type *bt; // type node
// instantiate a visitor context with a copy of our context. This info
// will be modified based on what type of node we are visiting
be_visitor_context ctx (*this->ctx_);
ctx.node (node); // set the node to be the node being visited. The scope is
// still the same
if (!node->cli_hdr_gen () && !node->imported ()) // not already generated and
// not imported
{
os = this->ctx_->stream ();
// generate the ifdefined macro for the union type
os->gen_ifdef_macro (node->flatname ());
os->indent (); // start with the current indentation level
*os << "class " << idl_global->export_macro () << " "
<< node->local_name () << ": public TAO_Base_Union " << be_nl
<< "{" << be_nl
<< "public:" << be_idt_nl
// generate default and copy constructors
<< node->local_name () << " (void); // default constructor" << be_nl
<< node->local_name () << " (const " << node->local_name ()
<< " &); // copy constructor" << be_nl
// generate destructor
<< "~" << node->local_name () << " (void); // destructor" << be_nl
// generate assignment operator
<< node->local_name () << " &operator= (const "
<< node->local_name () << " &); // copy constructor\n\n";
// retrieve the disriminant type
bt = be_type::narrow_from_decl (node->disc_type ());
if (!bt)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"bad disciminant type\n"), -1);
}
// the discriminant type may have to be defined here if it was an enum
// declaration inside of the union statement.
ctx.state (TAO_CodeGen::TAO_UNION_DISCTYPEDEFN_CH); // set current code
// gen state
be_visitor *visitor = tao_cg->make_visitor (&ctx);
if (!visitor)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"bad visitor\n"), -1);
}
if (bt->accept (visitor) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
" visit_union - "
"codegen for discriminant failed\n"), -1);
}
delete visitor;
// now generate the public defn for the union branch members. For this,
// set our state to reflect what we are aiming to do
this->ctx_->state (TAO_CodeGen::TAO_UNION_PUBLIC_CH); // set current code
// gen state
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"codegen for public defn of union members\n"),
-1);
}
// now generate the private data members of the union
os->decr_indent ();
*os << "private:\n";
os->incr_indent ();
*os << bt->nested_type_name (node) << " disc_;" << be_nl; // emit the
// ACE_NESTED_CLASS macro
// the members are inside of a union
*os << "union" << be_nl;
*os << "{\n";
os->incr_indent (0);
this->ctx_->state (TAO_CodeGen::TAO_UNION_PRIVATE_CH); // set current
// code gen state
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"codegen for private members of union\n"), -1);
}
os->decr_indent ();
*os << "} u_; // end of union" << be_nl;
// the reset method (TAO extension)
*os << "// TAO extensions" << be_nl;
*os << "void _reset (" << bt->nested_type_name (node)
<< ", CORBA::Boolean);" << be_nl;
*os << "// Frees any allocated storage" << be_nl << be_nl;
// the virtual overloaded _discriminant method
*os << "virtual void *_discriminant (void);" << be_nl;
*os << "// returns pointer to the discriminant" << be_nl << be_nl;
// the overloaded virtual reset method
*os << "virtual void _reset (void);" << be_nl;
*os << "// calls the above reset with finalize=1" << be_nl << be_nl;
// the _access method
*os << "virtual void *_access (CORBA::Boolean flag);" << be_nl;
*os << "// accesses the right data member. "
<< "Also will allocate on TRUE flag" << be_nl << be_uidt_nl;
*os << "}; // " << node->name () << "\n\n";
// by using a visitor to declare and define the TypeCode, we have the
// added advantage to conditionally not generate any code. This will be
// based on the command line options. This is still TO-DO
ctx = *this->ctx_;
ctx.state (TAO_CodeGen::TAO_TYPECODE_DECL);
visitor = tao_cg->make_visitor (&ctx);
if (!visitor || (node->accept (visitor) == -1))
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"TypeCode declaration failed\n"
), -1);
}
os->gen_endif ();
// generate the ifdefined macro for the _var type
os->gen_ifdef_macro (node->flatname (), "_var");
// generate var defn
if (node->gen_var_defn () == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"codegen for _var\n"), -1);
}
os->gen_endif ();
// generate the ifdefined macro for the array type
os->gen_ifdef_macro (node->flatname (), "_out");
// a class is generated for an out defn only for a variable length struct
if (node->size_type () == be_decl::VARIABLE)
{
if (node->gen_out_defn () == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"codegen for _out\n"), -1);
}
}
else
{
os->indent ();
*os << "typedef " << node->local_name () << " &" << node->local_name
() << "_out;\n\n";
}
os->gen_endif ();
node->cli_hdr_gen (I_TRUE);
}
return 0;
}
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