| /* Type stack for GDB parser. |
| |
| Copyright (C) 1986-2024 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef TYPE_STACK_H |
| #define TYPE_STACK_H |
| |
| #include "gdbtypes.h" |
| #include <vector> |
| |
| struct type; |
| struct expr_builder; |
| |
| /* For parsing of complicated types. |
| An array should be preceded in the list by the size of the array. */ |
| enum type_pieces |
| { |
| tp_end = -1, |
| tp_pointer, |
| tp_reference, |
| tp_rvalue_reference, |
| tp_array, |
| tp_function, |
| tp_function_with_arguments, |
| tp_const, |
| tp_volatile, |
| tp_space_identifier, |
| tp_atomic, |
| tp_restrict, |
| tp_type_stack, |
| tp_kind |
| }; |
| |
| /* The stack can contain either an enum type_pieces or an int. */ |
| union type_stack_elt |
| { |
| enum type_pieces piece; |
| int int_val; |
| struct type_stack *stack_val; |
| std::vector<struct type *> *typelist_val; |
| }; |
| |
| /* The type stack is an instance of this structure. */ |
| |
| struct type_stack |
| { |
| public: |
| |
| type_stack () = default; |
| |
| DISABLE_COPY_AND_ASSIGN (type_stack); |
| |
| type_stack *create () |
| { |
| type_stack *result = new type_stack (); |
| result->m_elements = std::move (m_elements); |
| return result; |
| } |
| |
| /* Insert a new type, TP, at the bottom of the type stack. If TP is |
| tp_pointer, tp_reference or tp_rvalue_reference, it is inserted at the |
| bottom. If TP is a qualifier, it is inserted at slot 1 (just above a |
| previous tp_pointer) if there is anything on the stack, or simply pushed |
| if the stack is empty. Other values for TP are invalid. */ |
| |
| void insert (enum type_pieces tp); |
| |
| void push (enum type_pieces tp) |
| { |
| type_stack_elt elt; |
| elt.piece = tp; |
| m_elements.push_back (elt); |
| } |
| |
| void push (int n) |
| { |
| type_stack_elt elt; |
| elt.int_val = n; |
| m_elements.push_back (elt); |
| } |
| |
| /* Push the type stack STACK as an element on this type stack. */ |
| |
| void push (struct type_stack *stack) |
| { |
| type_stack_elt elt; |
| elt.stack_val = stack; |
| m_elements.push_back (elt); |
| push (tp_type_stack); |
| } |
| |
| /* Push a function type with arguments onto the global type stack. |
| LIST holds the argument types. If the final item in LIST is NULL, |
| then the function will be varargs. */ |
| |
| void push (std::vector<struct type *> *list) |
| { |
| type_stack_elt elt; |
| elt.typelist_val = list; |
| m_elements.push_back (elt); |
| push (tp_function_with_arguments); |
| } |
| |
| enum type_pieces pop () |
| { |
| if (m_elements.empty ()) |
| return tp_end; |
| type_stack_elt elt = m_elements.back (); |
| m_elements.pop_back (); |
| return elt.piece; |
| } |
| |
| int pop_int () |
| { |
| if (m_elements.empty ()) |
| { |
| /* "Can't happen". */ |
| return 0; |
| } |
| type_stack_elt elt = m_elements.back (); |
| m_elements.pop_back (); |
| return elt.int_val; |
| } |
| |
| std::vector<struct type *> *pop_typelist () |
| { |
| gdb_assert (!m_elements.empty ()); |
| type_stack_elt elt = m_elements.back (); |
| m_elements.pop_back (); |
| return elt.typelist_val; |
| } |
| |
| /* Pop a type_stack element. */ |
| |
| struct type_stack *pop_type_stack () |
| { |
| gdb_assert (!m_elements.empty ()); |
| type_stack_elt elt = m_elements.back (); |
| m_elements.pop_back (); |
| return elt.stack_val; |
| } |
| |
| /* Insert a tp_space_identifier and the corresponding address space |
| value into the stack. STRING is the name of an address space, as |
| recognized by address_space_name_to_type_instance_flags. If the |
| stack is empty, the new elements are simply pushed. If the stack |
| is not empty, this function assumes that the first item on the |
| stack is a tp_pointer, and the new values are inserted above the |
| first item. */ |
| |
| void insert (struct expr_builder *pstate, const char *string); |
| |
| /* Append the elements of the type stack FROM to the type stack |
| THIS. Always returns THIS. */ |
| |
| struct type_stack *append (struct type_stack *from) |
| { |
| m_elements.insert (m_elements.end (), from->m_elements.begin (), |
| from->m_elements.end ()); |
| return this; |
| } |
| |
| /* Pop the type stack and return a type_instance_flags that |
| corresponds the const/volatile qualifiers on the stack. This is |
| called by the C++ parser when parsing methods types, and as such no |
| other kind of type in the type stack is expected. */ |
| |
| type_instance_flags follow_type_instance_flags (); |
| |
| /* Pop the type stack and return the type which corresponds to |
| FOLLOW_TYPE as modified by all the stuff on the stack. */ |
| struct type *follow_types (struct type *follow_type); |
| |
| private: |
| |
| /* A helper function for insert_type and insert_type_address_space. |
| This does work of expanding the type stack and inserting the new |
| element, ELEMENT, into the stack at location SLOT. */ |
| |
| void insert_into (int slot, union type_stack_elt element) |
| { |
| gdb_assert (slot <= m_elements.size ()); |
| m_elements.insert (m_elements.begin () + slot, element); |
| } |
| |
| |
| /* Elements on the stack. */ |
| std::vector<union type_stack_elt> m_elements; |
| }; |
| |
| #endif /* TYPE_STACK_H */ |