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//=============================================================================
/**
* @file union_ch.cpp
*
* Visitor generating code for Unions in the client header
*
* @author Aniruddha Gokhale
*/
//=============================================================================
#include "union.h"
be_visitor_union_ch::be_visitor_union_ch (be_visitor_context *ctx)
: be_visitor_union (ctx)
{
}
be_visitor_union_ch::~be_visitor_union_ch ()
{
}
int be_visitor_union_ch::visit_union (be_union *node)
{
if (node->cli_hdr_gen () || node->imported ())
{
return 0;
}
// Evaluate the member in time for the decision to generate
// the recursive typecode include in the stub source file.
ACE_Unbounded_Queue<AST_Type *> list;
(void) node->in_recursion (list);
// 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);
TAO_OutStream *os = this->ctx_->stream ();
// Generate _var and _out class typedefs.
node->gen_common_varout (os);
*os << be_nl_2
<< "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 () << " ();" << be_nl
<< node->local_name () << " (const " << node->local_name ()
<< " &);" << be_nl
// Generate destructor.
<< "~" << node->local_name () << " ();";
// Generate assignment operator.
*os << be_nl_2
<< node->local_name () << " &operator= (const "
<< node->local_name () << " &);";
// Retrieve the disriminant type.
be_type *bt = dynamic_cast<be_type*> (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.
be_visitor_union_discriminant_ch ud_visitor (&ctx);
if (bt->accept (&ud_visitor) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("be_visitor_union_ch::")
ACE_TEXT (" visit_union - ")
ACE_TEXT ("codegen for discriminant failed\n")),
-1);
}
node->gen_stub_decls (os);
// 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,
ACE_TEXT ("be_visitor_union_ch::")
ACE_TEXT ("visit_union - ")
ACE_TEXT ("codegen for public ")
ACE_TEXT ("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,
ACE_TEXT ("be_visitor_union_ch::")
ACE_TEXT ("visit_union - ")
ACE_TEXT ("computing default ")
ACE_TEXT ("value failed\n")),
-1);
}
if ((dv.computed_ != 0) && (node->default_index () == -1))
{
*os << be_nl_2 << "// TAO_IDL - Generated from" << be_nl
<< "// " << __FILE__ << ":" << __LINE__;
// Only if all cases are not covered AND there is no explicit
// default, we get the _default () method.
*os << be_nl_2
<< "void _default ();";
}
*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_2;
// The members are inside of a union.
*os << "union" << be_nl;
*os << "{" << be_idt;
this->ctx_->state (TAO_CodeGen::TAO_UNION_PRIVATE_CH);
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("be_visitor_union_ch::")
ACE_TEXT ("visit_union - ")
ACE_TEXT ("codegen for private")
ACE_TEXT (" members of union\n")),
-1);
}
*os << be_uidt_nl;
*os << "} u_;";
// The reset method (TAO extension).
*os << be_nl_2
<< "/// TAO extension - frees any allocated storage." << be_nl;
*os << "void _reset ();";
*os << be_uidt_nl << "};";
if (be_global->tc_support ())
{
ctx = *this->ctx_;
be_visitor_typecode_decl tc_visitor (&ctx);
if (node->accept (&tc_visitor) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("be_visitor_union_ch::")
ACE_TEXT ("visit_union - ")
ACE_TEXT ("TypeCode declaration failed\n")),
-1);
}
}
node->cli_hdr_gen (true);
return 0;
}
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