| /* Helper routines for C++ support in GDB. |
| Copyright (C) 2003-2013 Free Software Foundation, Inc. |
| |
| Contributed by David Carlton and by Kealia, 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/>. */ |
| |
| #include "defs.h" |
| #include "cp-support.h" |
| #include "gdb_obstack.h" |
| #include "symtab.h" |
| #include "symfile.h" |
| #include "gdb_assert.h" |
| #include "block.h" |
| #include "objfiles.h" |
| #include "gdbtypes.h" |
| #include "dictionary.h" |
| #include "command.h" |
| #include "frame.h" |
| #include "buildsym.h" |
| #include "language.h" |
| |
| static struct symbol *lookup_namespace_scope (const char *name, |
| const struct block *block, |
| const domain_enum domain, |
| const char *scope, |
| int scope_len); |
| |
| static struct symbol *lookup_symbol_file (const char *name, |
| const struct block *block, |
| const domain_enum domain, |
| int anonymous_namespace, |
| int search); |
| |
| static struct type *cp_lookup_transparent_type_loop (const char *name, |
| const char *scope, |
| int scope_len); |
| |
| /* Check to see if SYMBOL refers to an object contained within an |
| anonymous namespace; if so, add an appropriate using directive. */ |
| |
| void |
| cp_scan_for_anonymous_namespaces (const struct symbol *const symbol, |
| struct objfile *const objfile) |
| { |
| if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) |
| { |
| const char *name = SYMBOL_DEMANGLED_NAME (symbol); |
| unsigned int previous_component; |
| unsigned int next_component; |
| |
| /* Start with a quick-and-dirty check for mention of "(anonymous |
| namespace)". */ |
| |
| if (!cp_is_anonymous (name)) |
| return; |
| |
| previous_component = 0; |
| next_component = cp_find_first_component (name + previous_component); |
| |
| while (name[next_component] == ':') |
| { |
| if (((next_component - previous_component) |
| == CP_ANONYMOUS_NAMESPACE_LEN) |
| && strncmp (name + previous_component, |
| CP_ANONYMOUS_NAMESPACE_STR, |
| CP_ANONYMOUS_NAMESPACE_LEN) == 0) |
| { |
| int dest_len = (previous_component == 0 |
| ? 0 : previous_component - 2); |
| int src_len = next_component; |
| |
| char *dest = alloca (dest_len + 1); |
| char *src = alloca (src_len + 1); |
| |
| memcpy (dest, name, dest_len); |
| memcpy (src, name, src_len); |
| |
| dest[dest_len] = '\0'; |
| src[src_len] = '\0'; |
| |
| /* We've found a component of the name that's an |
| anonymous namespace. So add symbols in it to the |
| namespace given by the previous component if there is |
| one, or to the global namespace if there isn't. */ |
| cp_add_using_directive (dest, src, NULL, NULL, NULL, 1, |
| &objfile->objfile_obstack); |
| } |
| /* The "+ 2" is for the "::". */ |
| previous_component = next_component + 2; |
| next_component = (previous_component |
| + cp_find_first_component (name |
| + previous_component)); |
| } |
| } |
| } |
| |
| |
| /* Add a using directive to using_directives. If the using directive |
| in question has already been added, don't add it twice. |
| |
| Create a new struct using_direct which imports the namespace SRC |
| into the scope DEST. ALIAS is the name of the imported namespace |
| in the current scope. If ALIAS is NULL then the namespace is known |
| by its original name. DECLARATION is the name if the imported |
| varable if this is a declaration import (Eg. using A::x), otherwise |
| it is NULL. EXCLUDES is a list of names not to import from an |
| imported module or NULL. If COPY_NAMES is non-zero, then the |
| arguments are copied into newly allocated memory so they can be |
| temporaries. For EXCLUDES the VEC pointers are copied but the |
| pointed to characters are not copied. */ |
| |
| void |
| cp_add_using_directive (const char *dest, |
| const char *src, |
| const char *alias, |
| const char *declaration, |
| VEC (const_char_ptr) *excludes, |
| int copy_names, |
| struct obstack *obstack) |
| { |
| struct using_direct *current; |
| struct using_direct *new; |
| |
| /* Has it already been added? */ |
| |
| for (current = using_directives; current != NULL; current = current->next) |
| { |
| int ix; |
| const char *param; |
| |
| if (strcmp (current->import_src, src) != 0) |
| continue; |
| if (strcmp (current->import_dest, dest) != 0) |
| continue; |
| if ((alias == NULL && current->alias != NULL) |
| || (alias != NULL && current->alias == NULL) |
| || (alias != NULL && current->alias != NULL |
| && strcmp (alias, current->alias) != 0)) |
| continue; |
| if ((declaration == NULL && current->declaration != NULL) |
| || (declaration != NULL && current->declaration == NULL) |
| || (declaration != NULL && current->declaration != NULL |
| && strcmp (declaration, current->declaration) != 0)) |
| continue; |
| |
| /* Compare the contents of EXCLUDES. */ |
| for (ix = 0; VEC_iterate (const_char_ptr, excludes, ix, param); ix++) |
| if (current->excludes[ix] == NULL |
| || strcmp (param, current->excludes[ix]) != 0) |
| break; |
| if (ix < VEC_length (const_char_ptr, excludes) |
| || current->excludes[ix] != NULL) |
| continue; |
| |
| /* Parameters exactly match CURRENT. */ |
| return; |
| } |
| |
| new = obstack_alloc (obstack, (sizeof (*new) |
| + (VEC_length (const_char_ptr, excludes) |
| * sizeof (*new->excludes)))); |
| memset (new, 0, sizeof (*new)); |
| |
| if (copy_names) |
| { |
| new->import_src = obstack_copy0 (obstack, src, strlen (src)); |
| new->import_dest = obstack_copy0 (obstack, dest, strlen (dest)); |
| } |
| else |
| { |
| new->import_src = src; |
| new->import_dest = dest; |
| } |
| |
| if (alias != NULL && copy_names) |
| new->alias = obstack_copy0 (obstack, alias, strlen (alias)); |
| else |
| new->alias = alias; |
| |
| if (declaration != NULL && copy_names) |
| new->declaration = obstack_copy0 (obstack, |
| declaration, strlen (declaration)); |
| else |
| new->declaration = declaration; |
| |
| memcpy (new->excludes, VEC_address (const_char_ptr, excludes), |
| VEC_length (const_char_ptr, excludes) * sizeof (*new->excludes)); |
| new->excludes[VEC_length (const_char_ptr, excludes)] = NULL; |
| |
| new->next = using_directives; |
| using_directives = new; |
| } |
| |
| /* Test whether or not NAMESPACE looks like it mentions an anonymous |
| namespace; return nonzero if so. */ |
| |
| int |
| cp_is_anonymous (const char *namespace) |
| { |
| return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR) |
| != NULL); |
| } |
| |
| /* The C++-specific version of name lookup for static and global |
| names. This makes sure that names get looked for in all namespaces |
| that are in scope. NAME is the natural name of the symbol that |
| we're looking for, BLOCK is the block that we're searching within, |
| DOMAIN says what kind of symbols we're looking for, and if SYMTAB |
| is non-NULL, we should store the symtab where we found the symbol |
| in it. */ |
| |
| struct symbol * |
| cp_lookup_symbol_nonlocal (const char *name, |
| const struct block *block, |
| const domain_enum domain) |
| { |
| struct symbol *sym; |
| const char *scope = block_scope (block); |
| |
| sym = lookup_namespace_scope (name, block, |
| domain, scope, 0); |
| if (sym != NULL) |
| return sym; |
| |
| return cp_lookup_symbol_namespace (scope, name, |
| block, domain); |
| } |
| |
| /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are |
| as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search |
| through base classes for a matching symbol. */ |
| |
| static struct symbol * |
| cp_lookup_symbol_in_namespace (const char *namespace, |
| const char *name, |
| const struct block *block, |
| const domain_enum domain, int search) |
| { |
| if (namespace[0] == '\0') |
| { |
| return lookup_symbol_file (name, block, domain, 0, search); |
| } |
| else |
| { |
| char *concatenated_name = alloca (strlen (namespace) + 2 |
| + strlen (name) + 1); |
| |
| strcpy (concatenated_name, namespace); |
| strcat (concatenated_name, "::"); |
| strcat (concatenated_name, name); |
| return lookup_symbol_file (concatenated_name, block, domain, |
| cp_is_anonymous (namespace), search); |
| } |
| } |
| |
| /* Used for cleanups to reset the "searched" flag incase |
| of an error. */ |
| |
| static void |
| reset_directive_searched (void *data) |
| { |
| struct using_direct *direct = data; |
| direct->searched = 0; |
| } |
| |
| /* Search for NAME by applying all import statements belonging to |
| BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the |
| search is restricted to using declarations. |
| Example: |
| |
| namespace A { |
| int x; |
| } |
| using A::x; |
| |
| If SEARCH_PARENTS the search will include imports which are |
| applicable in parents of SCOPE. |
| Example: |
| |
| namespace A { |
| using namespace X; |
| namespace B { |
| using namespace Y; |
| } |
| } |
| |
| If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of |
| namespaces X and Y will be considered. If SEARCH_PARENTS is false |
| only the import of Y is considered. */ |
| |
| struct symbol * |
| cp_lookup_symbol_imports (const char *scope, |
| const char *name, |
| const struct block *block, |
| const domain_enum domain, |
| const int declaration_only, |
| const int search_parents) |
| { |
| struct using_direct *current; |
| struct symbol *sym = NULL; |
| int len; |
| int directive_match; |
| struct cleanup *searched_cleanup; |
| |
| /* First, try to find the symbol in the given namespace. */ |
| if (!declaration_only) |
| sym = cp_lookup_symbol_in_namespace (scope, name, |
| block, domain, 1); |
| |
| if (sym != NULL) |
| return sym; |
| |
| /* Go through the using directives. If any of them add new names to |
| the namespace we're searching in, see if we can find a match by |
| applying them. */ |
| |
| for (current = block_using (block); |
| current != NULL; |
| current = current->next) |
| { |
| const char **excludep; |
| |
| len = strlen (current->import_dest); |
| directive_match = (search_parents |
| ? (strncmp (scope, current->import_dest, |
| strlen (current->import_dest)) == 0 |
| && (len == 0 |
| || scope[len] == ':' |
| || scope[len] == '\0')) |
| : strcmp (scope, current->import_dest) == 0); |
| |
| /* If the import destination is the current scope or one of its |
| ancestors then it is applicable. */ |
| if (directive_match && !current->searched) |
| { |
| /* Mark this import as searched so that the recursive call |
| does not search it again. */ |
| current->searched = 1; |
| searched_cleanup = make_cleanup (reset_directive_searched, |
| current); |
| |
| /* If there is an import of a single declaration, compare the |
| imported declaration (after optional renaming by its alias) |
| with the sought out name. If there is a match pass |
| current->import_src as NAMESPACE to direct the search |
| towards the imported namespace. */ |
| if (current->declaration |
| && strcmp (name, current->alias |
| ? current->alias : current->declaration) == 0) |
| sym = cp_lookup_symbol_in_namespace (current->import_src, |
| current->declaration, |
| block, domain, 1); |
| |
| /* If this is a DECLARATION_ONLY search or a symbol was found |
| or this import statement was an import declaration, the |
| search of this import is complete. */ |
| if (declaration_only || sym != NULL || current->declaration) |
| { |
| current->searched = 0; |
| discard_cleanups (searched_cleanup); |
| |
| if (sym != NULL) |
| return sym; |
| |
| continue; |
| } |
| |
| /* Do not follow CURRENT if NAME matches its EXCLUDES. */ |
| for (excludep = current->excludes; *excludep; excludep++) |
| if (strcmp (name, *excludep) == 0) |
| break; |
| if (*excludep) |
| { |
| discard_cleanups (searched_cleanup); |
| continue; |
| } |
| |
| if (current->alias != NULL |
| && strcmp (name, current->alias) == 0) |
| /* If the import is creating an alias and the alias matches |
| the sought name. Pass current->import_src as the NAME to |
| direct the search towards the aliased namespace. */ |
| { |
| sym = cp_lookup_symbol_in_namespace (scope, |
| current->import_src, |
| block, domain, 1); |
| } |
| else if (current->alias == NULL) |
| { |
| /* If this import statement creates no alias, pass |
| current->inner as NAMESPACE to direct the search |
| towards the imported namespace. */ |
| sym = cp_lookup_symbol_imports (current->import_src, |
| name, block, |
| domain, 0, 0); |
| } |
| current->searched = 0; |
| discard_cleanups (searched_cleanup); |
| |
| if (sym != NULL) |
| return sym; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /* Helper function that searches an array of symbols for one named |
| NAME. */ |
| |
| static struct symbol * |
| search_symbol_list (const char *name, int num, |
| struct symbol **syms) |
| { |
| int i; |
| |
| /* Maybe we should store a dictionary in here instead. */ |
| for (i = 0; i < num; ++i) |
| { |
| if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0) |
| return syms[i]; |
| } |
| return NULL; |
| } |
| |
| /* Like cp_lookup_symbol_imports, but if BLOCK is a function, it |
| searches through the template parameters of the function and the |
| function's type. */ |
| |
| struct symbol * |
| cp_lookup_symbol_imports_or_template (const char *scope, |
| const char *name, |
| const struct block *block, |
| const domain_enum domain) |
| { |
| struct symbol *function = BLOCK_FUNCTION (block); |
| |
| if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus) |
| { |
| /* Search the function's template parameters. */ |
| if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function)) |
| { |
| struct template_symbol *templ |
| = (struct template_symbol *) function; |
| struct symbol *result; |
| |
| result = search_symbol_list (name, |
| templ->n_template_arguments, |
| templ->template_arguments); |
| if (result != NULL) |
| return result; |
| } |
| |
| /* Search the template parameters of the function's defining |
| context. */ |
| if (SYMBOL_NATURAL_NAME (function)) |
| { |
| struct type *context; |
| char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function)); |
| struct cleanup *cleanups = make_cleanup (xfree, name_copy); |
| const struct language_defn *lang = language_def (language_cplus); |
| struct gdbarch *arch = SYMBOL_SYMTAB (function)->objfile->gdbarch; |
| const struct block *parent = BLOCK_SUPERBLOCK (block); |
| |
| while (1) |
| { |
| struct symbol *result; |
| unsigned int prefix_len = cp_entire_prefix_len (name_copy); |
| |
| if (prefix_len == 0) |
| context = NULL; |
| else |
| { |
| name_copy[prefix_len] = '\0'; |
| context = lookup_typename (lang, arch, |
| name_copy, |
| parent, 1); |
| } |
| |
| if (context == NULL) |
| break; |
| |
| result |
| = search_symbol_list (name, |
| TYPE_N_TEMPLATE_ARGUMENTS (context), |
| TYPE_TEMPLATE_ARGUMENTS (context)); |
| if (result != NULL) |
| return result; |
| } |
| |
| do_cleanups (cleanups); |
| } |
| } |
| |
| return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1); |
| } |
| |
| /* Searches for NAME in the current namespace, and by applying |
| relevant import statements belonging to BLOCK and its parents. |
| SCOPE is the namespace scope of the context in which the search is |
| being evaluated. */ |
| |
| struct symbol* |
| cp_lookup_symbol_namespace (const char *scope, |
| const char *name, |
| const struct block *block, |
| const domain_enum domain) |
| { |
| struct symbol *sym; |
| |
| /* First, try to find the symbol in the given namespace. */ |
| sym = cp_lookup_symbol_in_namespace (scope, name, |
| block, domain, 1); |
| if (sym != NULL) |
| return sym; |
| |
| /* Search for name in namespaces imported to this and parent |
| blocks. */ |
| while (block != NULL) |
| { |
| sym = cp_lookup_symbol_imports (scope, name, block, |
| domain, 0, 1); |
| |
| if (sym) |
| return sym; |
| |
| block = BLOCK_SUPERBLOCK (block); |
| } |
| |
| return NULL; |
| } |
| |
| /* Lookup NAME at namespace scope (or, in C terms, in static and |
| global variables). SCOPE is the namespace that the current |
| function is defined within; only consider namespaces whose length |
| is at least SCOPE_LEN. Other arguments are as in |
| cp_lookup_symbol_nonlocal. |
| |
| For example, if we're within a function A::B::f and looking for a |
| symbol x, this will get called with NAME = "x", SCOPE = "A::B", and |
| SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same, |
| but with SCOPE_LEN = 1. And then it calls itself with NAME and |
| SCOPE the same, but with SCOPE_LEN = 4. This third call looks for |
| "A::B::x"; if it doesn't find it, then the second call looks for |
| "A::x", and if that call fails, then the first call looks for |
| "x". */ |
| |
| static struct symbol * |
| lookup_namespace_scope (const char *name, |
| const struct block *block, |
| const domain_enum domain, |
| const char *scope, |
| int scope_len) |
| { |
| char *namespace; |
| |
| if (scope[scope_len] != '\0') |
| { |
| /* Recursively search for names in child namespaces first. */ |
| |
| struct symbol *sym; |
| int new_scope_len = scope_len; |
| |
| /* If the current scope is followed by "::", skip past that. */ |
| if (new_scope_len != 0) |
| { |
| gdb_assert (scope[new_scope_len] == ':'); |
| new_scope_len += 2; |
| } |
| new_scope_len += cp_find_first_component (scope + new_scope_len); |
| sym = lookup_namespace_scope (name, block, domain, |
| scope, new_scope_len); |
| if (sym != NULL) |
| return sym; |
| } |
| |
| /* Okay, we didn't find a match in our children, so look for the |
| name in the current namespace. */ |
| |
| namespace = alloca (scope_len + 1); |
| strncpy (namespace, scope, scope_len); |
| namespace[scope_len] = '\0'; |
| return cp_lookup_symbol_in_namespace (namespace, name, |
| block, domain, 1); |
| } |
| |
| /* Look up NAME in BLOCK's static block and in global blocks. If |
| ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located |
| within an anonymous namespace. If SEARCH is non-zero, search through |
| base classes for a matching symbol. Other arguments are as in |
| cp_lookup_symbol_nonlocal. */ |
| |
| static struct symbol * |
| lookup_symbol_file (const char *name, |
| const struct block *block, |
| const domain_enum domain, |
| int anonymous_namespace, int search) |
| { |
| struct symbol *sym = NULL; |
| |
| sym = lookup_symbol_static (name, block, domain); |
| if (sym != NULL) |
| return sym; |
| |
| if (anonymous_namespace) |
| { |
| /* Symbols defined in anonymous namespaces have external linkage |
| but should be treated as local to a single file nonetheless. |
| So we only search the current file's global block. */ |
| |
| const struct block *global_block = block_global_block (block); |
| |
| if (global_block != NULL) |
| sym = lookup_symbol_aux_block (name, global_block, domain); |
| } |
| else |
| { |
| sym = lookup_symbol_global (name, block, domain); |
| } |
| |
| if (sym != NULL) |
| return sym; |
| |
| if (search) |
| { |
| char *klass, *nested; |
| unsigned int prefix_len; |
| struct cleanup *cleanup; |
| struct symbol *klass_sym; |
| |
| /* A simple lookup failed. Check if the symbol was defined in |
| a base class. */ |
| |
| cleanup = make_cleanup (null_cleanup, NULL); |
| |
| /* Find the name of the class and the name of the method, |
| variable, etc. */ |
| prefix_len = cp_entire_prefix_len (name); |
| |
| /* If no prefix was found, search "this". */ |
| if (prefix_len == 0) |
| { |
| struct type *type; |
| struct symbol *this; |
| |
| this = lookup_language_this (language_def (language_cplus), block); |
| if (this == NULL) |
| { |
| do_cleanups (cleanup); |
| return NULL; |
| } |
| |
| type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this))); |
| klass = xstrdup (TYPE_NAME (type)); |
| nested = xstrdup (name); |
| } |
| else |
| { |
| /* The class name is everything up to and including PREFIX_LEN. */ |
| klass = savestring (name, prefix_len); |
| |
| /* The rest of the name is everything else past the initial scope |
| operator. */ |
| nested = xstrdup (name + prefix_len + 2); |
| } |
| |
| /* Add cleanups to free memory for these strings. */ |
| make_cleanup (xfree, klass); |
| make_cleanup (xfree, nested); |
| |
| /* Lookup a class named KLASS. If none is found, there is nothing |
| more that can be done. */ |
| klass_sym = lookup_symbol_global (klass, block, domain); |
| if (klass_sym == NULL) |
| { |
| do_cleanups (cleanup); |
| return NULL; |
| } |
| |
| /* Look for a symbol named NESTED in this class. */ |
| sym = cp_lookup_nested_symbol (SYMBOL_TYPE (klass_sym), nested, block); |
| do_cleanups (cleanup); |
| } |
| |
| return sym; |
| } |
| |
| /* Search through the base classes of PARENT_TYPE for a symbol named |
| NAME in block BLOCK. */ |
| |
| static struct symbol * |
| find_symbol_in_baseclass (struct type *parent_type, const char *name, |
| const struct block *block) |
| { |
| int i; |
| struct symbol *sym; |
| struct cleanup *cleanup; |
| char *concatenated_name; |
| |
| sym = NULL; |
| concatenated_name = NULL; |
| cleanup = make_cleanup (free_current_contents, &concatenated_name); |
| for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) |
| { |
| size_t len; |
| const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); |
| |
| if (base_name == NULL) |
| continue; |
| |
| /* Search this particular base class. */ |
| sym = cp_lookup_symbol_namespace (base_name, name, block, VAR_DOMAIN); |
| if (sym != NULL) |
| break; |
| |
| len = strlen (base_name) + 2 + strlen (name) + 1; |
| concatenated_name = xrealloc (concatenated_name, len); |
| xsnprintf (concatenated_name, len, "%s::%s", base_name, name); |
| sym = lookup_symbol_static (concatenated_name, block, VAR_DOMAIN); |
| |
| /* If there is currently no BLOCK, e.g., the inferior hasn't yet |
| been started, then try searching all STATIC_BLOCK symbols in |
| all objfiles. */ |
| if (block == NULL) |
| { |
| sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); |
| if (sym != NULL) |
| break; |
| } |
| |
| /* If this class has base classes, search them next. */ |
| if (TYPE_N_BASECLASSES (TYPE_BASECLASS (parent_type, i)) > 0) |
| { |
| sym = find_symbol_in_baseclass (TYPE_BASECLASS (parent_type, i), |
| name, block); |
| if (sym != NULL) |
| break; |
| } |
| } |
| |
| do_cleanups (cleanup); |
| return sym; |
| } |
| |
| /* Look up a symbol named NESTED_NAME that is nested inside the C++ |
| class or namespace given by PARENT_TYPE, from within the context |
| given by BLOCK. Return NULL if there is no such nested type. */ |
| |
| struct symbol * |
| cp_lookup_nested_symbol (struct type *parent_type, |
| const char *nested_name, |
| const struct block *block) |
| { |
| /* type_name_no_tag_required provides better error reporting using the |
| original type. */ |
| struct type *saved_parent_type = parent_type; |
| |
| CHECK_TYPEDEF (parent_type); |
| |
| switch (TYPE_CODE (parent_type)) |
| { |
| case TYPE_CODE_STRUCT: |
| case TYPE_CODE_NAMESPACE: |
| case TYPE_CODE_UNION: |
| { |
| /* NOTE: carlton/2003-11-10: We don't treat C++ class members |
| of classes like, say, data or function members. Instead, |
| they're just represented by symbols whose names are |
| qualified by the name of the surrounding class. This is |
| just like members of namespaces; in particular, |
| lookup_symbol_namespace works when looking them up. */ |
| |
| int size; |
| const char *parent_name = type_name_no_tag_or_error (saved_parent_type); |
| struct symbol *sym |
| = cp_lookup_symbol_in_namespace (parent_name, nested_name, |
| block, VAR_DOMAIN, 0); |
| char *concatenated_name; |
| |
| if (sym != NULL) |
| return sym; |
| |
| /* Now search all static file-level symbols. Not strictly |
| correct, but more useful than an error. We do not try to |
| guess any imported namespace as even the fully specified |
| namespace search is already not C++ compliant and more |
| assumptions could make it too magic. */ |
| |
| size = strlen (parent_name) + 2 + strlen (nested_name) + 1; |
| concatenated_name = alloca (size); |
| xsnprintf (concatenated_name, size, "%s::%s", |
| parent_name, nested_name); |
| sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); |
| if (sym != NULL) |
| return sym; |
| |
| /* If no matching symbols were found, try searching any |
| base classes. */ |
| return find_symbol_in_baseclass (parent_type, nested_name, block); |
| } |
| |
| case TYPE_CODE_FUNC: |
| case TYPE_CODE_METHOD: |
| return NULL; |
| |
| default: |
| internal_error (__FILE__, __LINE__, |
| _("cp_lookup_nested_symbol called " |
| "on a non-aggregate type.")); |
| } |
| } |
| |
| /* The C++-version of lookup_transparent_type. */ |
| |
| /* FIXME: carlton/2004-01-16: The problem that this is trying to |
| address is that, unfortunately, sometimes NAME is wrong: it may not |
| include the name of namespaces enclosing the type in question. |
| lookup_transparent_type gets called when the type in question |
| is a declaration, and we're trying to find its definition; but, for |
| declarations, our type name deduction mechanism doesn't work. |
| There's nothing we can do to fix this in general, I think, in the |
| absence of debug information about namespaces (I've filed PR |
| gdb/1511 about this); until such debug information becomes more |
| prevalent, one heuristic which sometimes looks is to search for the |
| definition in namespaces containing the current namespace. |
| |
| We should delete this functions once the appropriate debug |
| information becomes more widespread. (GCC 3.4 will be the first |
| released version of GCC with such information.) */ |
| |
| struct type * |
| cp_lookup_transparent_type (const char *name) |
| { |
| /* First, try the honest way of looking up the definition. */ |
| struct type *t = basic_lookup_transparent_type (name); |
| const char *scope; |
| |
| if (t != NULL) |
| return t; |
| |
| /* If that doesn't work and we're within a namespace, look there |
| instead. */ |
| scope = block_scope (get_selected_block (0)); |
| |
| if (scope[0] == '\0') |
| return NULL; |
| |
| return cp_lookup_transparent_type_loop (name, scope, 0); |
| } |
| |
| /* Lookup the type definition associated to NAME in namespaces/classes |
| containing SCOPE whose name is strictly longer than LENGTH. LENGTH |
| must be the index of the start of a component of SCOPE. */ |
| |
| static struct type * |
| cp_lookup_transparent_type_loop (const char *name, |
| const char *scope, |
| int length) |
| { |
| int scope_length = length + cp_find_first_component (scope + length); |
| char *full_name; |
| |
| /* If the current scope is followed by "::", look in the next |
| component. */ |
| if (scope[scope_length] == ':') |
| { |
| struct type *retval |
| = cp_lookup_transparent_type_loop (name, scope, |
| scope_length + 2); |
| |
| if (retval != NULL) |
| return retval; |
| } |
| |
| full_name = alloca (scope_length + 2 + strlen (name) + 1); |
| strncpy (full_name, scope, scope_length); |
| strncpy (full_name + scope_length, "::", 2); |
| strcpy (full_name + scope_length + 2, name); |
| |
| return basic_lookup_transparent_type (full_name); |
| } |
| |
| /* This used to do something but was removed when it became |
| obsolete. */ |
| |
| static void |
| maintenance_cplus_namespace (char *args, int from_tty) |
| { |
| printf_unfiltered (_("The `maint namespace' command was removed.\n")); |
| } |
| |
| /* Provide a prototype to silence -Wmissing-prototypes. */ |
| extern initialize_file_ftype _initialize_cp_namespace; |
| |
| void |
| _initialize_cp_namespace (void) |
| { |
| struct cmd_list_element *cmd; |
| |
| cmd = add_cmd ("namespace", class_maintenance, |
| maintenance_cplus_namespace, |
| _("Deprecated placeholder for removed functionality."), |
| &maint_cplus_cmd_list); |
| deprecate_cmd (cmd, NULL); |
| } |