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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
//
// ============================================================================
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)
{
}
int be_visitor_union_ch::visit_union (be_union *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);
if (!node->cli_hdr_gen () && !node->imported ())
{
TAO_OutStream *os = this->ctx_->stream ();
// Generate the ifdefined macro for the union type.
os->gen_ifdef_macro (node->flat_name ());
*os << "class " << node->local_name () << "_var;" << be_nl << be_nl;
*os << "class " << be_global->stub_export_macro () << " "
<< node->local_name () << be_nl
<< "{" << be_nl
<< "public:" << be_idt_nl
// Generate default and copy constructors.
<< node->local_name () << " (void);" << be_nl
<< node->local_name () << " (const " << node->local_name ()
<< " &);" << be_nl
// Generate destructor.
<< "~" << node->local_name () << " (void);" << be_nl;
*os << "static void _tao_any_destructor (void*);"
<< be_nl << be_nl;
// Generate assignment operator.
*os << node->local_name () << " &operator= (const "
<< node->local_name () << " &);" << be_nl << be_nl;
// Retrieve the disriminant type.
be_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);
be_visitor_union_discriminant_ch ud_visitor (&ctx);
if (bt->accept (&ud_visitor) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
" visit_union - "
"codegen for discriminant failed\n"),
-1);
}
// Generate the _var_type typedef
// but we must protect against certain versions of g++.
*os << "\n#if !defined(__GNUC__) || !defined (ACE_HAS_GNUG_PRE_2_8)"
<< be_nl;
*os << "typedef " << node->local_name () << "_var _var_type;\n"
<< "#endif /* ! __GNUC__ || g++ >= 2.8 */" << be_nl << be_nl;
// 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);
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 check if we need to generate the _default () method.
be_union::DefaultValue dv;
if (node->default_value (dv) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ch::"
"visit_union - "
"computing default value failed\n"),
-1);
}
if ((dv.computed_ != 0) && (node->default_index () == -1))
{
// Only if all cases are not covered AND there is no explicit
// default, we get the _default () method.
*os << "void _default (void);";
}
*os << be_uidt_nl;
// Now generate the private data members of the union.
*os << "private:" << be_idt_nl;
*os << bt->nested_type_name (node) << " disc_;" << be_nl;
*os << bt->nested_type_name (node) << " holder_;" << be_nl << be_nl;
// Emit the ACE_NESTED_CLASS macro.
// The members are inside of a union.
*os << "union" << be_nl;
*os << "{" << be_idt_nl;
this->ctx_->state (TAO_CodeGen::TAO_UNION_PRIVATE_CH);
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 << be_uidt_nl;
*os << "} u_;" << be_nl << be_nl;
// The reset method (TAO extension).
*os << "// TAO extension." << be_nl;
*os << "void _reset (" << bt->nested_type_name (node)
<< ", CORBA::Boolean /* finalize */);" << be_nl;
*os << "// Frees any allocated storage." << be_nl << be_nl;
*os << "}; //" << node->name () << be_nl << be_nl;
if (be_global->tc_support ())
{
ctx = *this->ctx_;
ctx.state (TAO_CodeGen::TAO_TYPECODE_DECL);
be_visitor_typecode_decl tc_visitor (&ctx);
if (node->accept (&tc_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->flat_name (), "_var");
// Generate var definition.
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->flat_name (), "_out");
// A class is generated for an out defn only for a variable
// length struct.
if (node->size_type () == AST_Type::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 << "typedef " << node->local_name () << " &"
<< node->local_name () << "_out;" << be_nl << be_nl;
}
os->gen_endif ();
node->cli_hdr_gen (I_TRUE);
}
return 0;
}
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