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// $Id$
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// be_union_branch.cpp
//
// = DESCRIPTION
// Extension of class AST_UnionBranch that provides additional means for C++
// mapping.
//
// = AUTHOR
// Copyright 1994-1995 by Sun Microsystems, Inc.
// and
// Aniruddha Gokhale
//
// ============================================================================
#include "be_union_branch.h"
#include "be_union.h"
#include "be_type.h"
#include "be_enum.h"
#include "be_visitor.h"
#include "be_helper.h"
#include "ast_union_label.h"
#include "ace/Log_Msg.h"
ACE_RCSID (be,
be_union_branch,
"$Id$")
be_union_branch::be_union_branch (void)
: COMMON_Base (),
AST_Decl (),
AST_Field (),
AST_UnionBranch (),
be_decl ()
{
}
be_union_branch::be_union_branch (UTL_LabelList *ll,
AST_Type *ft,
UTL_ScopedName *n)
: COMMON_Base (ft->is_local (),
ft->is_abstract ()),
AST_Decl (AST_Decl::NT_union_branch,
n),
AST_Field (AST_Decl::NT_union_branch,
ft,
n),
AST_UnionBranch (ll,
ft,
n),
be_decl (AST_Decl::NT_union_branch,
n)
{
}
int
be_union_branch::gen_label_value (TAO_OutStream *os, unsigned long index)
{
AST_Expression *e = this->label (index)->label_val ();
if (e->ec () != AST_Expression::EC_symbol)
{
// Easy, just a number...
*os << e;
return 0;
}
// If the enum is not in the global scope we have to prefix it.
be_union *u =
be_union::narrow_from_scope (this->defined_in ());
if (u == 0)
{
return -1;
}
be_type* dt =
be_type::narrow_from_decl (u->disc_type ());
if (dt == 0)
{
return -1;
}
// Check if discriminator is a typedef of an integer. If so, and the
// first IF block in this function didn't catch it, then we
// are a constant of this type. We can't generate the constant's name,
// we must generate the underlying integer value for the
// label value.
if (dt->node_type () == AST_Decl::NT_pre_defined)
{
*os << e;
return 0;
}
// Find where was the enum defined, if it was defined in the globa
// scope, then it is easy to generate the enum values....
be_scope* scope =
be_scope::narrow_from_scope (dt->defined_in ());
if (scope == 0)
{
*os << e->n ();
return 0;
}
// But if it was generated inside a module or something similar then
// we must prefix the enum value with something...
be_decl* decl = scope->decl ();
*os << decl->full_name () << "::" << e->n ()->last_component ();
return 0;
}
int
be_union_branch::gen_default_label_value (TAO_OutStream *os,
be_union *bu)
{
be_union::DefaultValue dv;
if (bu->default_value (dv) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_branch::"
"gen_default_label_value - "
"computing default value failed\n"),
-1);
}
switch (bu->udisc_type ())
{
case AST_Expression::EV_short:
*os << dv.u.short_val;
break;
case AST_Expression::EV_ushort:
*os << dv.u.ushort_val;
break;
case AST_Expression::EV_long:
*os << dv.u.long_val;
break;
case AST_Expression::EV_ulong:
*os << dv.u.ulong_val;
break;
case AST_Expression::EV_char:
os->print ("%d", dv.u.char_val);
break;
case AST_Expression::EV_bool:
*os << (dv.u.bool_val == 0 ? "false" : "true");
break;
case AST_Expression::EV_enum:
// The discriminant is an enum. Some compilers will
// not accept a numeric value assigned to this
// discriminant, so we must generate the string name.
{
AST_ConcreteType *act = bu->disc_type ();
be_enum *be = be_enum::narrow_from_decl (act);
// The function value_to_name() takes care of adding
// any necessary scoping to the output.
*os << be->value_to_name (dv.u.enum_val);
break;
}
case AST_Expression::EV_longlong:
case AST_Expression::EV_ulonglong:
// Unimplemented.
default:
// Error caught earlier.
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_branch::"
"gen_default_label_value - "
"bad or unimplemented discriminant type\n"),
-1);
}
return 0;
}
int
be_union_branch::accept (be_visitor *visitor)
{
return visitor->visit_union_branch (this);
}
void
be_union_branch::destroy (void)
{
this->be_decl::destroy ();
this->AST_UnionBranch::destroy ();
}
// Narrowing.
IMPL_NARROW_METHODS2 (be_union_branch, AST_UnionBranch, be_decl)
IMPL_NARROW_FROM_DECL (be_union_branch)
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