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//
// $Id$
//
/* -*- C++ -*- */
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// be_visitor_context.h
//
// = DESCRIPTION
// This class serves to provide all the necessary context information to the
// visitor as it generates code. This may include the scope inside which the
// code is generated, the output file that is being used, and others. This
// context information will be passed to the abstract/concrete visitor
// factory which in turn will use it to construct the right visitor.
//
// = AUTHOR
// Aniruddha Gokhale
//
// ============================================================================
#if !defined (TAO_BE_VISITOR_CONTEXT_H)
#define TAO_BE_VISITOR_CONTEXT_H
class be_visitor_context
{
public:
be_visitor_context (void);
// default constructor
be_visitor_context (const be_visitor_context &ctx);
// default constructor
~be_visitor_context (void);
// destructor
be_visitor_context &operator= (const be_visitor_context &ctx);
// assignment operator
// =helpers
void reset (void);
// reset the context
void stream (TAO_OutStream *os);
// set the output stream
TAO_OutStream *stream (void);
// get the stream
void scope (be_decl *scope);
// set the scope
be_decl *scope (void);
// get the scope in which code will be generated
void node (be_decl *node);
// current node being visited
be_decl *node (void);
// node being visited
void state (TAO_CodeGen::CG_STATE);
// code generation state
TAO_CodeGen::CG_STATE state (void);
// return the code generation state
void alias (be_typedef *node);
// set the alias node (if any)
be_typedef *alias (void);
// return the aliased node (if any)
void tdef (be_typedef *node);
// set the typedef node (if any)
be_typedef *tdef (void);
// return the typedef node (if any)
void attribute (be_attribute *attr);
// set the attribute node if any
be_attribute *attribute (void);
// get the attribute node
void exception (idl_bool);
// is it the special ctor for exceptions?
idl_bool exception (void);
// is it the special ctor for exceptions?
void comma (idl_bool);
// scope supoorts generation of comma after each element
idl_bool comma (void);
// are we supposed to generate a comma?
be_interface* interface (void) const;
void interface (be_interface*);
// In some cases we need to generate the objects of one interface as
// members of a derived visitor (the TIE classes are a good
// example). This field is use to hold the interface where we are
// *generating* code, as opposed to the interfaces where the methods
// or structures are defined.
// = helpers
// visitors may need the actual type of the node stored in this context. We
// could have kept separate nodes but that would have increased the size of
// the context class by a large extent. So we will rely on the
// "narrow_from_decl" approach
// two types of helpers are provided here. One of them returns the node as
// the desired actual type. The other returns the scope as the desired type.
be_argument *be_node_as_argument (void);
// return the node as argument if possible
be_array *be_node_as_array (void);
// return the node as array if possible
be_attribute *be_node_as_attribute (void);
// return the node as attribute if possible
be_constant *be_node_as_constant (void);
// return the node as constant if possible
be_enum *be_node_as_enum (void);
// return the node as enum if possible
be_enum_val *be_node_as_enum_val (void);
// return the node as enum_val if possible
be_exception *be_node_as_exception (void);
// return the node as exception if possible
be_field *be_node_as_field (void);
// return the node as field if possible
be_interface *be_node_as_interface (void);
// return the node as interface if possible
be_interface_fwd *be_node_as_interface_fwd (void);
// return the node as interface_fwd if possible
be_module *be_node_as_module (void);
// return the node as module if possible
be_operation *be_node_as_operation (void);
// return the node as operation if possible
be_predefined_type *be_node_as_predefined_type (void);
// return the node as predefined_type if possible
be_root *be_node_as_root (void);
// return the node as root if possible
be_sequence *be_node_as_sequence (void);
// return the node as sequence if possible
be_string *be_node_as_string (void);
// return the node as string if possible
be_structure *be_node_as_structure (void);
// return the node as structure if possible
be_typedef *be_node_as_typedef (void);
// return the node as typedef if possible
be_union *be_node_as_union (void);
// return the node as union if possible
be_union_branch *be_node_as_union_branch (void);
// return the node as union_branch if possible
// for scope
be_enum *be_scope_as_enum (void);
// return the scope as enum if possible
be_exception *be_scope_as_exception (void);
// return the scope as exception if possible
be_interface *be_scope_as_interface (void);
// return the scope as interface if possible
be_module *be_scope_as_module (void);
// return the scope as module if possible
be_operation *be_scope_as_operation (void);
// return the scope as operation if possible
be_root *be_scope_as_root (void);
// return the scope as root if possible
be_structure *be_scope_as_structure (void);
// return the scope as structure if possible
be_union *be_scope_as_union (void);
// return the scope as union if possible
private:
TAO_CodeGen::CG_STATE state_;
// code generation state
TAO_OutStream *os_;
// current output stream
be_decl *scope_;
// current scope in which code is generated
be_decl *node_;
// current node
be_typedef *alias_;
// aliased node used as a scoped name to define IDL types.
be_typedef *tdef_;
// typedef node
be_attribute *attr_;
// attribute node stored here while generating its code
idl_bool exception_;
// is it the special ctor for exceptions?
idl_bool comma_;
// whether scope should generate a comma after every element
be_interface* interface_;
// See the method declaration above.
};
#endif /* BE_VISITOR_CONTEXT_H */
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