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SunSoft, Inc. 2550 Garcia Avenue Mountain View, California 94043 NOTE: SunOS, SunSoft, Sun, Solaris, Sun Microsystems or the Sun logo are trademarks or registered trademarks of Sun Microsystems, Inc. */ #include "ast_enum.h" #include "ast_enum_val.h" #include "ast_generator.h" #include "ast_visitor.h" #include "utl_identifier.h" #include "utl_err.h" #include "utl_indenter.h" AST_Decl::NodeType const AST_Enum::NT = AST_Decl::NT_enum; AST_Enum::AST_Enum (UTL_ScopedName *n, bool local, bool abstract) : COMMON_Base (local, abstract), AST_Decl (AST_Decl::NT_enum, n), AST_Type (AST_Decl::NT_enum, n), AST_ConcreteType (AST_Decl::NT_enum, n), UTL_Scope (AST_Decl::NT_enum), pd_enum_counter (0), member_count_ (-1) { this->size_type (AST_Type::FIXED); } AST_Enum::~AST_Enum () { } // Return the member count. int AST_Enum::member_count () { if (this->member_count_ == -1) { this->compute_member_count (); } return this->member_count_; } // Convert a numeric value to the string name UTL_ScopedName * AST_Enum::value_to_name (const unsigned long v) { AST_EnumVal *item = nullptr; AST_Decl *d = nullptr; for (UTL_ScopeActiveIterator i (this, IK_decls); !i.is_done (); i.next ()) { d = i.item (); item = dynamic_cast (d); if (item->constant_value ()->ev ()->u.ulval == v) { return item->name (); } } return nullptr; } // Look up an enumerator by the value of the supplied expression. AST_EnumVal * AST_Enum::lookup_by_value (const AST_Expression *v) { AST_EnumVal *item = nullptr; AST_Decl *d = nullptr; for (UTL_ScopeActiveIterator i (this, IK_decls); !i.is_done (); i.next ()) { d = i.item (); item = dynamic_cast (d); AST_Expression *cv = item->constant_value (); if (cv == v) { return item; } // Enum union label expressions don't get evaluated upon // creation, to evaluate them later, we have only the // string name to look up the enum value with. UTL_ScopedName *v_n = const_cast (v)->n (); if (v_n != nullptr) { Identifier *cv_i = item->local_name (); Identifier *v_i = v_n->last_component (); if (cv_i->compare (v_i)) { return item; } } } return nullptr; } // Compute the value to be assigned to the next enumerator. Bump the // counter. unsigned long AST_Enum::next_enum_val () { unsigned long i = pd_enum_counter++; return i; } // Static helper functions // Modify scoped name of an enumval so that it is scoped inside the scope // in which the enum is defined and not inside the enum itself static UTL_ScopedName * munge_name_for_enumval (UTL_ScopedName *n, Identifier *last_component) { long len = n->length (); UTL_ScopedName *hold = n; // Last three components are: // - scope in which enum is defined // - scope for enum // - name of enumval // We want to stop cdr'ing down the list when the head of the // list is at the name for the scope in which the enum is defined. while (len > 3) { len--; n = (UTL_ScopedName *) n->tail (); } UTL_IdList *id = nullptr; ACE_NEW_RETURN (id, UTL_IdList (last_component->copy (), nullptr), nullptr); n->set_tail (id); return hold; } // Compute total number of members. int AST_Enum::compute_member_count () { this->member_count_ = 0; // If there are elements in this scope if (this->nmembers () > 0) { for (UTL_ScopeActiveIterator i (this, IK_decls); !i.is_done (); i.next ()) { // Get the next AST decl node. ++this->member_count_; } } return 0; } AST_EnumVal * AST_Enum::fe_add_enum_val (AST_EnumVal *t) { AST_Decl *d = nullptr; AST_EnumVal *t1 = nullptr; AST_Expression::AST_ExprValue *ev = t->constant_value ()->coerce (AST_Expression::EV_ulong); t1 = idl_global->gen ()->create_enum_val (ev->u.ulval, t->name ()); delete ev; ev = nullptr; UTL_ScopedName *sn = munge_name_for_enumval ((UTL_IdList *) t->name ()->copy (), t->local_name ()); t->set_name (sn); sn = munge_name_for_enumval ((UTL_IdList *) t1->name ()->copy (), t1->local_name ()); t1->set_name (sn); // Already defined and cannot be redefined? Or already used? if ((d = this->lookup_for_add (t)) != nullptr) { if (!FE_Utils::can_be_redefined (d, t)) { idl_global->err ()->error3 (UTL_Error::EIDL_REDEF, t, this, d); return nullptr; } if (this->referenced (d, t->local_name ())) { idl_global->err ()->error3 (UTL_Error::EIDL_DEF_USE, t, this, d); return nullptr; } if (t->has_ancestor (d)) { idl_global->err ()->redefinition_in_scope (t, d); return nullptr; } } // Add it to scope. this->add_to_scope (t); // Add it to set of locally referenced symbols. this->add_to_referenced (t, false, t->local_name ()); if (t1 == nullptr) { // Prevent dereferencing null pointer in nested calls. return nullptr; } // Add it to enclosing scope. idl_global->scopes ().next_to_top ()->fe_add_enum_val (t1); return t; } // Redefinition of inherited virtual operations. // Dump this AST_Enum to the ostream o void AST_Enum::dump (ACE_OSTREAM_TYPE &o) { AST_Decl *d = nullptr; if (this->is_local ()) { this->dump_i (o, "(local) "); } else if (this->is_abstract ()) { this->dump_i (o, "(abstract) "); } this->dump_i (o, "enum "); this->local_name ()->dump (o); this->dump_i (o, " {\n"); idl_global->indent ()->increase (); idl_global->indent ()->skip_to (o); // Must increment the iterator explicitly inside the loop. for (UTL_ScopeActiveIterator i (this, IK_decls);!i.is_done ();) { d = i.item (); d->dump_annotations (o, true /* print inline */); d->local_name ()->dump (o); i.next (); if (i.is_done ()) { this->dump_i (o, "\n"); } else { this->dump_i (o, ",\n"); idl_global->indent ()->skip_to (o); } } idl_global->indent ()->decrease (); idl_global->indent ()->skip_to (o); this->dump_i (o, "}"); } int AST_Enum::ast_accept (ast_visitor *visitor) { return visitor->visit_enum (this); } void AST_Enum::destroy () { this->UTL_Scope::destroy (); this->AST_ConcreteType::destroy (); }