More signed overflow fixes

[deliverable/binutils-gdb.git] / gdb / language.h

diff --git a/gdb/language.h b/gdb/language.h
index 5c86f6abca2b41676e22d535e59b9e0aa59f5600..14d6fac30371313efc70c5c7316c751ff838b52a 100644 (file)
--- a/gdb/language.h
+++ b/gdb/language.h
@@ -1,7 +1,6 @@
 /* Source-language-related definitions for GDB.
 
 /* Source-language-related definitions for GDB.
 

-   Copyright (C) 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2003, 2004,
-   2007 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.

 
    Contributed by the Department of Computer Science at the State University
    of New York at Buffalo.
 
    Contributed by the Department of Computer Science at the State University
    of New York at Buffalo.


@@ -24,24 +23,24 @@
 #if !defined (LANGUAGE_H)
 #define LANGUAGE_H 1
 
 #if !defined (LANGUAGE_H)
 #define LANGUAGE_H 1
 

-/* Forward decls for prototypes */
+#include "symtab.h"
+#include "gdbsupport/function-view.h"
+#include "expression.h"
+
+/* Forward decls for prototypes.  */

 struct value;
 struct objfile;
 struct frame_info;
 struct value;
 struct objfile;
 struct frame_info;

-struct expression;

 struct ui_file;
 struct ui_file;

+struct value_print_options;
+struct type_print_options;
+struct lang_varobj_ops;
+struct parser_state;
+class compile_instance;
+struct completion_match_for_lcd;
+class innermost_block_tracker;

 
 

-/* enum exp_opcode;     ANSI's `wisdom' didn't include forward enum decls. */
-
-/* This used to be included to configure GDB for one or more specific
-   languages.  Now it is left out to configure for all of them.  FIXME.  */
-/* #include "lang_def.h" */
-#define        _LANG_c
-#define        _LANG_m2
-#define  _LANG_fortran
-#define  _LANG_pascal
-
-#define MAX_FORTRAN_DIMS  7    /* Maximum number of F77 array dims */
+#define MAX_FORTRAN_DIMS  7    /* Maximum number of F77 array dims.  */

 
 /* range_mode ==
    range_mode_auto:   range_check set automatically to default of language.
 
 /* range_mode ==
    range_mode_auto:   range_check set automatically to default of language.


@@ -64,29 +63,8 @@ extern enum range_check
   }
 range_check;
 
   }
 range_check;
 

-/* type_mode ==
-   type_mode_auto:   type_check set automatically to default of language
-   type_mode_manual: type_check set manually by user. */
-
-extern enum type_mode
-  {
-    type_mode_auto, type_mode_manual
-  }
-type_mode;
-
-/* type_check ==
-   type_check_on:    Types are checked in GDB expressions, producing errors.
-   type_check_warn:  Types are checked, producing warnings.
-   type_check_off:   Types are not checked in GDB expressions.  */
-
-extern enum type_check
-  {
-    type_check_off, type_check_warn, type_check_on
-  }
-type_check;
-

 /* case_mode ==
 /* case_mode ==

-   case_mode_auto:   case_sensitivity set upon selection of scope 
+   case_mode_auto:   case_sensitivity set upon selection of scope.

    case_mode_manual: case_sensitivity set only by user.  */
 
 extern enum case_mode
    case_mode_manual: case_sensitivity set only by user.  */
 
 extern enum case_mode


@@ -96,8 +74,8 @@ extern enum case_mode
 case_mode;
 
 /* array_ordering ==
 case_mode;
 
 /* array_ordering ==

-   array_row_major:     Arrays are in row major order
-   array_column_major:  Arrays are in column major order.*/
+   array_row_major:     Arrays are in row major order.
+   array_column_major:  Arrays are in column major order.  */

 
 extern enum array_ordering
   {
 
 extern enum array_ordering
   {


@@ -107,14 +85,25 @@ array_ordering;
 
 
 /* case_sensitivity ==
 
 
 /* case_sensitivity ==

-   case_sensitive_on:   Case sensitivity in name matching is used
-   case_sensitive_off:  Case sensitivity in name matching is not used  */
+   case_sensitive_on:   Case sensitivity in name matching is used.
+   case_sensitive_off:  Case sensitivity in name matching is not used.  */

 
 extern enum case_sensitivity
   {
     case_sensitive_on, case_sensitive_off
   }
 case_sensitivity;
 
 extern enum case_sensitivity
   {
     case_sensitive_on, case_sensitive_off
   }
 case_sensitivity;

+
+
+/* macro_expansion ==
+   macro_expansion_no:  No macro expansion is available.
+   macro_expansion_c:   C-like macro expansion is available.  */
+
+enum macro_expansion
+  {
+    macro_expansion_no, macro_expansion_c
+  };
+

 \f
 /* Per architecture (OS/ABI) language information.  */
 
 \f
 /* Per architecture (OS/ABI) language information.  */
 


@@ -125,80 +114,142 @@ struct language_arch_info
      expressions, regardless of whether the program being debugged
      actually defines such a type.  */
   struct type **primitive_type_vector;
      expressions, regardless of whether the program being debugged
      actually defines such a type.  */
   struct type **primitive_type_vector;

-  /* Type of elements of strings. */
+
+  /* Symbol wrappers around primitive_type_vector, so that the symbol lookup
+     machinery can return them.  */
+  struct symbol **primitive_type_symbols;
+
+  /* Type of elements of strings.  */

   struct type *string_char_type;
   struct type *string_char_type;

+
+  /* Symbol name of type to use as boolean type, if defined.  */
+  const char *bool_type_symbol;
+  /* Otherwise, this is the default boolean builtin type.  */
+  struct type *bool_type_default;

 };
 
 /* Structure tying together assorted information about a language.  */
 
 struct language_defn
   {
 };
 
 /* Structure tying together assorted information about a language.  */
 
 struct language_defn
   {

-    /* Name of the language */
+    /* Name of the language.  */

 
 

-    char *la_name;
+    const char *la_name;

 
 

-    /* its symtab language-enum (defs.h) */
+    /* Natural or official name of the language.  */

 
 

-    enum language la_language;
+    const char *la_natural_name;

 
 

-    /* Default range checking */
+    /* its symtab language-enum (defs.h).  */

 
 

-    enum range_check la_range_check;
+    enum language la_language;

 
 

-    /* Default type checking */
+    /* Default range checking.  */

 
 

-    enum type_check la_type_check;
+    enum range_check la_range_check;

 
 

-    /* Default case sensitivity */
+    /* Default case sensitivity.  */

     enum case_sensitivity la_case_sensitivity;
 
     enum case_sensitivity la_case_sensitivity;
 

-    /* Multi-dimensional array ordering */
+    /* Multi-dimensional array ordering.  */

     enum array_ordering la_array_ordering;
 
     enum array_ordering la_array_ordering;
 

-    /* Definitions related to expression printing, prefixifying, and
-       dumping */
+    /* Style of macro expansion, if any, supported by this language.  */
+    enum macro_expansion la_macro_expansion;

 
 

-    const struct exp_descriptor *la_exp_desc;
+    /* A NULL-terminated array of file extensions for this language.
+       The extension must include the ".", like ".c".  If this
+       language doesn't need to provide any filename extensions, this
+       may be NULL.  */

 
 

-    /* Parser function. */
+    const char *const *la_filename_extensions;

 
 

-    int (*la_parser) (void);
+    /* Definitions related to expression printing, prefixifying, and
+       dumping.  */

 
 

-    /* Parser error function */
+    const struct exp_descriptor *la_exp_desc;
+
+    /* Parser function.  */

 
 

-    void (*la_error) (char *);
+    int (*la_parser) (struct parser_state *);

 
     /* Given an expression *EXPP created by prefixifying the result of
        la_parser, perform any remaining processing necessary to complete
        its translation.  *EXPP may change; la_post_parser is responsible 
        for releasing its previous contents, if necessary.  If 
 
     /* Given an expression *EXPP created by prefixifying the result of
        la_parser, perform any remaining processing necessary to complete
        its translation.  *EXPP may change; la_post_parser is responsible 
        for releasing its previous contents, if necessary.  If 

-       VOID_CONTEXT_P, then no value is expected from the expression.  */
+       VOID_CONTEXT_P, then no value is expected from the expression.
+       If COMPLETING is non-zero, then the expression has been parsed
+       for completion, not evaluation.  */
+
+    void (*la_post_parser) (expression_up *expp, int void_context_p,
+                           int completing, innermost_block_tracker *tracker);
+
+    void (*la_printchar) (int ch, struct type *chtype,
+                         struct ui_file * stream);
+
+    void (*la_printstr) (struct ui_file * stream, struct type *elttype,
+                        const gdb_byte *string, unsigned int length,
+                        const char *encoding, int force_ellipses,
+                        const struct value_print_options *);
+
+    void (*la_emitchar) (int ch, struct type *chtype,
+                        struct ui_file * stream, int quoter);
+
+    /* Print a type using syntax appropriate for this language.  */
+
+    void (*la_print_type) (struct type *, const char *, struct ui_file *, int,
+                          int, const struct type_print_options *);
+
+    /* Print a typedef using syntax appropriate for this language.
+       TYPE is the underlying type.  NEW_SYMBOL is the symbol naming
+       the type.  STREAM is the output stream on which to print.  */
+
+    void (*la_print_typedef) (struct type *type, struct symbol *new_symbol,
+                             struct ui_file *stream);
+
+    /* Print a value using syntax appropriate for this language.
+       
+       TYPE is the type of the sub-object to be printed.
+
+       EMBEDDED_OFFSET is the offset into the outermost object of the
+       sub-object represented by TYPE.  This is the object which this
+       call should print.  Note that the enclosing type is not
+       available.
+
+       ADDRESS is the address in the inferior of the enclosing object.

 
 

-    void (*la_post_parser) (struct expression ** expp, int void_context_p);
+       STREAM is the stream on which the value is to be printed.

 
 

-    void (*la_printchar) (int ch, struct ui_file * stream);
+       RECURSE is the recursion depth.  It is zero-based.

 
 

-    void (*la_printstr) (struct ui_file * stream, const gdb_byte *string,
-                        unsigned int length, int width,
-                        int force_ellipses);
+       OPTIONS are the formatting options to be used when
+       printing.  */

 
 

-    void (*la_emitchar) (int ch, struct ui_file * stream, int quoter);
+    void (*la_val_print) (struct type *type,
+                         int embedded_offset, CORE_ADDR address,
+                         struct ui_file *stream, int recurse,
+                         struct value *val,
+                         const struct value_print_options *options);

 
 

-    /* Print a type using syntax appropriate for this language. */
+    /* Print a top-level value using syntax appropriate for this language.  */

 
 

-    void (*la_print_type) (struct type *, char *, struct ui_file *, int,
-                          int);
+    void (*la_value_print) (struct value *, struct ui_file *,
+                           const struct value_print_options *);

 
 

-    /* Print a value using syntax appropriate for this language. */
+    /* Given a symbol VAR, the corresponding block VAR_BLOCK (if any) and a
+       stack frame id FRAME, read the value of the variable and return (pointer
+       to a) struct value containing the value.

 
 

-    int (*la_val_print) (struct type *, const gdb_byte *, int, CORE_ADDR,
-                        struct ui_file *, int, int, int,
-                        enum val_prettyprint);
+       VAR_BLOCK is needed if there's a possibility for VAR to be outside
+       FRAME.  This is what happens if FRAME correspond to a nested function
+       and VAR is defined in the outer function.  If callers know that VAR is
+       located in FRAME or is global/static, NULL can be passed as VAR_BLOCK.

 
 

-    /* Print a top-level value using syntax appropriate for this language. */
+       Throw an error if the variable cannot be found.  */

 
 

-    int (*la_value_print) (struct value *, struct ui_file *,
-                          int, enum val_prettyprint);
+    struct value *(*la_read_var_value) (struct symbol *var,
+                                       const struct block *var_block,
+                                       struct frame_info *frame);

 
     /* PC is possibly an unknown languages trampoline.
        If that PC falls in a trampoline belonging to this language,
 
     /* PC is possibly an unknown languages trampoline.
        If that PC falls in a trampoline belonging to this language,


@@ -208,24 +259,40 @@ struct language_defn
 
     /* Now come some hooks for lookup_symbol.  */
 
 
     /* Now come some hooks for lookup_symbol.  */
 

-    /* If this is non-NULL, lookup_symbol will do the 'field_of_this'
-       check, using this function to find the value of this.  */
+    /* If this is non-NULL, specifies the name that of the implicit
+       local variable that refers to the current object instance.  */

 
 

-    /* FIXME: carlton/2003-05-19: Audit all the language_defn structs
-       to make sure we're setting this appropriately: I'm sure it
-       could be NULL in more languages.  */
+    const char *la_name_of_this;

 
 

-    struct value *(*la_value_of_this) (int complain);
+    /* True if the symbols names should be stored in GDB's data structures
+       for minimal/partial/full symbols using their linkage (aka mangled)
+       form; false if the symbol names should be demangled first.
+
+       Most languages implement symbol lookup by comparing the demangled
+       names, in which case it is advantageous to store that information
+       already demangled, and so would set this field to false.
+
+       On the other hand, some languages have opted for doing symbol
+       lookups by comparing mangled names instead, for reasons usually
+       specific to the language.  Those languages should set this field
+       to true.
+
+       And finally, other languages such as C or Asm do not have
+       the concept of mangled vs demangled name, so those languages
+       should set this field to true as well, to prevent any accidental
+       demangling through an unrelated language's demangler.  */
+
+    const bool la_store_sym_names_in_linkage_form_p;

 
     /* This is a function that lookup_symbol will call when it gets to
        the part of symbol lookup where C looks up static and global
        variables.  */
 
 
     /* This is a function that lookup_symbol will call when it gets to
        the part of symbol lookup where C looks up static and global
        variables.  */
 

-    struct symbol *(*la_lookup_symbol_nonlocal) (const char *,
-                                                const char *,
-                                                const struct block *,
-                                                const domain_enum,
-                                                struct symtab **);
+    struct block_symbol (*la_lookup_symbol_nonlocal)
+      (const struct language_defn *,
+       const char *,
+       const struct block *,
+       const domain_enum);

 
     /* Find the definition of the type with the given name.  */
     struct type *(*la_lookup_transparent_type) (const char *);
 
     /* Find the definition of the type with the given name.  */
     struct type *(*la_lookup_transparent_type) (const char *);


@@ -233,23 +300,52 @@ struct language_defn
     /* Return demangled language symbol, or NULL.  */
     char *(*la_demangle) (const char *mangled, int options);
 
     /* Return demangled language symbol, or NULL.  */
     char *(*la_demangle) (const char *mangled, int options);
 

+    /* Demangle a symbol according to this language's rules.  Unlike
+       la_demangle, this does not take any options.
+
+       *DEMANGLED will be set by this function.
+       
+       If this function returns 0, then *DEMANGLED must always be set
+       to NULL.
+
+       If this function returns 1, the implementation may set this to
+       a xmalloc'd string holding the demangled form.  However, it is
+       not required to.  The string, if any, is owned by the caller.
+
+       The resulting string should be of the form that will be
+       installed into a symbol.  */
+    int (*la_sniff_from_mangled_name) (const char *mangled, char **demangled);
+

     /* Return class name of a mangled method name or NULL.  */
     char *(*la_class_name_from_physname) (const char *physname);
 
     /* Return class name of a mangled method name or NULL.  */
     char *(*la_class_name_from_physname) (const char *physname);
 

-    /* Table for printing expressions */
+    /* Table for printing expressions.  */

 
     const struct op_print *la_op_print_tab;
 
     /* Zero if the language has first-class arrays.  True if there are no
 
     const struct op_print *la_op_print_tab;
 
     /* Zero if the language has first-class arrays.  True if there are no

-       array values, and array objects decay to pointers, as in C. */
+       array values, and array objects decay to pointers, as in C.  */

 
     char c_style_arrays;
 
 
     char c_style_arrays;
 

-    /* Index to use for extracting the first element of a string. */
+    /* Index to use for extracting the first element of a string.  */

     char string_lower_bound;
 
     /* The list of characters forming word boundaries.  */
     char string_lower_bound;
 
     /* The list of characters forming word boundaries.  */

-    char *(*la_word_break_characters) (void);
+    const char *(*la_word_break_characters) (void);
+
+    /* Add to the completion tracker all symbols which are possible
+       completions for TEXT.  WORD is the entire command on which the
+       completion is being made.  If CODE is TYPE_CODE_UNDEF, then all
+       symbols should be examined; otherwise, only STRUCT_DOMAIN
+       symbols whose type has a code of CODE should be matched.  */
+    void (*la_collect_symbol_completion_matches)
+      (completion_tracker &tracker,
+       complete_symbol_mode mode,
+       symbol_name_match_type match_type,
+       const char *text,
+       const char *word,
+       enum type_code code);

 
     /* The per-architecture (OS/ABI) language information.  */
     void (*la_language_arch_info) (struct gdbarch *,
 
     /* The per-architecture (OS/ABI) language information.  */
     void (*la_language_arch_info) (struct gdbarch *,


@@ -258,22 +354,97 @@ struct language_defn
     /* Print the index of an element of an array.  */
     void (*la_print_array_index) (struct value *index_value,
                                   struct ui_file *stream,
     /* Print the index of an element of an array.  */
     void (*la_print_array_index) (struct value *index_value,
                                   struct ui_file *stream,

-                                  int format,
-                                  enum val_prettyprint pretty);
+                                  const struct value_print_options *options);

 
     /* Return non-zero if TYPE should be passed (and returned) by
        reference at the language level.  */
     int (*la_pass_by_reference) (struct type *type);
 
 
     /* Return non-zero if TYPE should be passed (and returned) by
        reference at the language level.  */
     int (*la_pass_by_reference) (struct type *type);
 

-    /* Add fields above this point, so the magic number is always last. */
-    /* Magic number for compat checking */
-
-    long la_magic;
+    /* Return an expression that can be used for a location
+       watchpoint.  TYPE is a pointer type that points to the memory
+       to watch, and ADDR is the address of the watched memory.  */
+    gdb::unique_xmalloc_ptr<char> (*la_watch_location_expression)
+         (struct type *type, CORE_ADDR addr);
+
+    /* Return a pointer to the function that should be used to match a
+       symbol name against LOOKUP_NAME, according to this language's
+       rules.  The matching algorithm depends on LOOKUP_NAME.  For
+       example, on Ada, the matching algorithm depends on the symbol
+       name (wild/full/verbatim matching), and on whether we're doing
+       a normal lookup or a completion match lookup.
+
+       This field may be NULL, in which case
+       default_symbol_name_matcher is used to perform the
+       matching.  */
+    symbol_name_matcher_ftype *(*la_get_symbol_name_matcher)
+      (const lookup_name_info &);
+
+    /* Find all symbols in the current program space matching NAME in
+       DOMAIN, according to this language's rules.
+
+       The search is done in BLOCK only.
+       The caller is responsible for iterating up through superblocks
+       if desired.
+
+       For each one, call CALLBACK with the symbol.  If CALLBACK
+       returns false, the iteration ends at that point.
+
+       This field may not be NULL.  If the language does not need any
+       special processing here, 'iterate_over_symbols' should be
+       used as the definition.  */
+    bool (*la_iterate_over_symbols)
+      (const struct block *block, const lookup_name_info &name,
+       domain_enum domain,
+       gdb::function_view<symbol_found_callback_ftype> callback);
+
+    /* Hash the given symbol search name.  Use
+       default_search_name_hash if no special treatment is
+       required.  */
+    unsigned int (*la_search_name_hash) (const char *name);
+
+    /* Various operations on varobj.  */
+    const struct lang_varobj_ops *la_varobj_ops;
+
+    /* If this language allows compilation from the gdb command line,
+       this method should be non-NULL.  When called it should return
+       an instance of struct gcc_context appropriate to the language.
+       When defined this method must never return NULL; instead it
+       should throw an exception on failure.  The returned compiler
+       instance is owned by its caller and must be deallocated by
+       calling its 'destroy' method.  */
+
+    compile_instance *(*la_get_compile_instance) (void);
+
+    /* This method must be defined if 'la_get_gcc_context' is defined.
+       If 'la_get_gcc_context' is not defined, then this method is
+       ignored.
+
+       This takes the user-supplied text and returns a new bit of code
+       to compile.
+
+       INST is the compiler instance being used.
+       INPUT is the user's input text.
+       GDBARCH is the architecture to use.
+       EXPR_BLOCK is the block in which the expression is being
+       parsed.
+       EXPR_PC is the PC at which the expression is being parsed.  */
+
+    std::string (*la_compute_program) (compile_instance *inst,
+                                      const char *input,
+                                      struct gdbarch *gdbarch,
+                                      const struct block *expr_block,
+                                      CORE_ADDR expr_pc);
+
+    /* Return true if TYPE is a string type.  */
+    bool (*la_is_string_type_p) (struct type *type);
+
+    /* This string is used by the 'set print max-depth' setting.  When GDB
+       replaces a struct or union (during value printing) that is "too
+       deep" this string is displayed instead.  */
+    const char *la_struct_too_deep_ellipsis;

 
   };
 
 
   };
 

-#define LANG_MAGIC     910823L
-

 /* Pointer to the language_defn for our current language.  This pointer
    always points to *some* valid struct; it can be used without checking
    it for validity.
 /* Pointer to the language_defn for our current language.  This pointer
    always points to *some* valid struct; it can be used without checking
    it for validity.


@@ -297,6 +468,11 @@ extern const struct language_defn *current_language;
 
 extern const struct language_defn *expected_language;
 
 
 extern const struct language_defn *expected_language;
 

+/* Warning issued when current_language and the language of the current
+   frame do not match.  */
+
+extern const char lang_frame_mismatch_warn[];
+

 /* language_mode == 
    language_mode_auto:   current_language automatically set upon selection
    of scope (e.g. stack frame)
 /* language_mode == 
    language_mode_auto:   current_language automatically set upon selection
    of scope (e.g. stack frame)


@@ -308,28 +484,39 @@ extern enum language_mode
   }
 language_mode;
 
   }
 language_mode;
 

+struct type *language_bool_type (const struct language_defn *l,
+                                struct gdbarch *gdbarch);
+

 struct type *language_string_char_type (const struct language_defn *l,
                                        struct gdbarch *gdbarch);
 
 struct type *language_string_char_type (const struct language_defn *l,
                                        struct gdbarch *gdbarch);
 

-struct type *language_lookup_primitive_type_by_name (const struct language_defn *l,
-                                                    struct gdbarch *gdbarch,
-                                                    const char *name);
+/* Look up type NAME in language L, and return its definition for architecture
+   GDBARCH.  Returns NULL if not found.  */
+
+struct type *language_lookup_primitive_type (const struct language_defn *l,
+                                            struct gdbarch *gdbarch,
+                                            const char *name);
+
+/* Wrapper around language_lookup_primitive_type to return the
+   corresponding symbol.  */
+
+struct symbol *
+  language_lookup_primitive_type_as_symbol (const struct language_defn *l,
+                                           struct gdbarch *gdbarch,
+                                           const char *name);

 
 \f
 /* These macros define the behaviour of the expression 
    evaluator.  */
 
 
 \f
 /* These macros define the behaviour of the expression 
    evaluator.  */
 

-/* Should we strictly type check expressions? */
-#define STRICT_TYPE (type_check != type_check_off)
-
-/* Should we range check values against the domain of their type? */
+/* Should we range check values against the domain of their type?  */

 #define RANGE_CHECK (range_check != range_check_off)
 
 #define RANGE_CHECK (range_check != range_check_off)
 

-/* "cast" really means conversion */
-/* FIXME -- should be a setting in language_defn */
-#define CAST_IS_CONVERSION (current_language->la_language == language_c  || \
-                           current_language->la_language == language_cplus || \
-                           current_language->la_language == language_objc)
+/* "cast" really means conversion.  */
+/* FIXME -- should be a setting in language_defn.  */
+#define CAST_IS_CONVERSION(LANG) ((LANG)->la_language == language_c  || \
+                                 (LANG)->la_language == language_cplus || \
+                                 (LANG)->la_language == language_objc)

 
 extern void language_info (int);
 
 
 extern void language_info (int);
 


@@ -339,108 +526,67 @@ extern enum language set_language (enum language);
 /* This page contains functions that return things that are
    specific to languages.  Each of these functions is based on
    the current setting of working_lang, which the user sets
 /* This page contains functions that return things that are
    specific to languages.  Each of these functions is based on
    the current setting of working_lang, which the user sets

-   with the "set language" command. */
+   with the "set language" command.  */

 
 

-#define LA_PRINT_TYPE(type,varstring,stream,show,level) \
-  (current_language->la_print_type(type,varstring,stream,show,level))
+#define LA_PRINT_TYPE(type,varstring,stream,show,level,flags)          \
+  (current_language->la_print_type(type,varstring,stream,show,level,flags))

 
 

-#define LA_VAL_PRINT(type,valaddr,offset,addr,stream,fmt,deref,recurse,pretty) \
-  (current_language->la_val_print(type,valaddr,offset,addr,stream,fmt,deref, \
-                                 recurse,pretty))
-#define LA_VALUE_PRINT(val,stream,fmt,pretty) \
-  (current_language->la_value_print(val,stream,fmt,pretty))
+#define LA_PRINT_TYPEDEF(type,new_symbol,stream) \
+  (current_language->la_print_typedef(type,new_symbol,stream))

 
 

-#define LA_PRINT_CHAR(ch, stream) \
-  (current_language->la_printchar(ch, stream))
-#define LA_PRINT_STRING(stream, string, length, width, force_ellipses) \
-  (current_language->la_printstr(stream, string, length, width, force_ellipses))
-#define LA_EMIT_CHAR(ch, stream, quoter) \
-  (current_language->la_emitchar(ch, stream, quoter))
+#define LA_VALUE_PRINT(val,stream,options) \
+  (current_language->la_value_print(val,stream,options))

 
 

-#define LA_PRINT_ARRAY_INDEX(index_value, stream, format, pretty) \
-  (current_language->la_print_array_index(index_value, stream, format, pretty))
+#define LA_PRINT_CHAR(ch, type, stream) \
+  (current_language->la_printchar(ch, type, stream))
+#define LA_PRINT_STRING(stream, elttype, string, length, encoding, force_ellipses, options) \
+  (current_language->la_printstr(stream, elttype, string, length, \
+                                encoding, force_ellipses,options))
+#define LA_EMIT_CHAR(ch, type, stream, quoter) \
+  (current_language->la_emitchar(ch, type, stream, quoter))
+
+#define LA_PRINT_ARRAY_INDEX(index_value, stream, options) \
+  (current_language->la_print_array_index(index_value, stream, options))
+
+#define LA_ITERATE_OVER_SYMBOLS(BLOCK, NAME, DOMAIN, CALLBACK) \
+  (current_language->la_iterate_over_symbols (BLOCK, NAME, DOMAIN, CALLBACK))

 
 /* Test a character to decide whether it can be printed in literal form
    or needs to be printed in another representation.  For example,
    in C the literal form of the character with octal value 141 is 'a'
    and the "other representation" is '\141'.  The "other representation"
 
 /* Test a character to decide whether it can be printed in literal form
    or needs to be printed in another representation.  For example,
    in C the literal form of the character with octal value 141 is 'a'
    and the "other representation" is '\141'.  The "other representation"

-   is program language dependent. */
+   is program language dependent.  */

 
 #define PRINT_LITERAL_FORM(c)          \
   ((c) >= 0x20                         \
    && ((c) < 0x7F || (c) >= 0xA0)      \
    && (!sevenbit_strings || (c) < 0x80))
 
 
 #define PRINT_LITERAL_FORM(c)          \
   ((c) >= 0x20                         \
    && ((c) < 0x7F || (c) >= 0xA0)      \
    && (!sevenbit_strings || (c) < 0x80))
 

-#if 0
-/* FIXME: cagney/2000-03-04: This function does not appear to be used.
-   It can be deleted once 5.0 has been released. */
-/* Return a string that contains the hex digits of the number.  No preceeding
-   "0x" */
-
-extern char *longest_raw_hex_string (LONGEST);
-#endif
-

 /* Type predicates */
 
 /* Type predicates */
 

-extern int simple_type (struct type *);
-
-extern int ordered_type (struct type *);
-
-extern int same_type (struct type *, struct type *);
-
-extern int integral_type (struct type *);
-
-extern int numeric_type (struct type *);
-
-extern int character_type (struct type *);
-
-extern int boolean_type (struct type *);
-
-extern int float_type (struct type *);
-

 extern int pointer_type (struct type *);
 
 extern int pointer_type (struct type *);
 

-extern int structured_type (struct type *);
-
-/* Checks Binary and Unary operations for semantic type correctness */
-/* FIXME:  Does not appear to be used */
-#define unop_type_check(v,o) binop_type_check((v),NULL,(o))
-
-extern void binop_type_check (struct value *, struct value *, int);
+/* Return true if TYPE is a string type, otherwise return false.  This
+   default implementation only detects TYPE_CODE_STRING.  */
+extern bool default_is_string_type_p (struct type *type);

 
 /* Error messages */
 
 
 /* Error messages */
 

-extern void op_error (const char *lhs, enum exp_opcode,
-                     const char *rhs);
-
-extern void type_error (const char *, ...) ATTR_FORMAT (printf, 1, 2);
-
-extern void range_error (const char *, ...) ATTR_FORMAT (printf, 1, 2);
+extern void range_error (const char *, ...) ATTRIBUTE_PRINTF (1, 2);

 
 /* Data:  Does this value represent "truth" to the current language?  */
 
 extern int value_true (struct value *);
 
 
 /* Data:  Does this value represent "truth" to the current language?  */
 
 extern int value_true (struct value *);
 

-extern struct type *lang_bool_type (void);
-
-/* The type used for Boolean values in the current language. */
-#define LA_BOOL_TYPE lang_bool_type ()
-

 /* Misc:  The string representing a particular enum language.  */
 
 /* Misc:  The string representing a particular enum language.  */
 

-extern enum language language_enum (char *str);
+extern enum language language_enum (const char *str);

 
 extern const struct language_defn *language_def (enum language);
 
 
 extern const struct language_defn *language_def (enum language);
 

-extern char *language_str (enum language);
-
-/* Add a language to the set known by GDB (at initialization time).  */
+extern const char *language_str (enum language);

 
 

-extern void add_language (const struct language_defn *);
-
-extern enum language get_frame_language (void);        /* In stack.c */
-
-/* Check for a language-specific trampoline. */
+/* Check for a language-specific trampoline.  */

 
 extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
 
 
 extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
 


@@ -448,18 +594,24 @@ extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
 extern char *language_demangle (const struct language_defn *current_language, 
                                const char *mangled, int options);
 
 extern char *language_demangle (const struct language_defn *current_language, 
                                const char *mangled, int options);
 

+/* A wrapper for la_sniff_from_mangled_name.  The arguments and result
+   are as for the method.  */
+
+extern int language_sniff_from_mangled_name (const struct language_defn *lang,
+                                            const char *mangled,
+                                            char **demangled);
+

 /* Return class name from physname, or NULL.  */
 extern char *language_class_name_from_physname (const struct language_defn *,
                                                const char *physname);
 
 /* Splitting strings into words.  */
 /* Return class name from physname, or NULL.  */
 extern char *language_class_name_from_physname (const struct language_defn *,
                                                const char *physname);
 
 /* Splitting strings into words.  */

-extern char *default_word_break_characters (void);
+extern const char *default_word_break_characters (void);

 
 /* Print the index of an array element using the C99 syntax.  */
 extern void default_print_array_index (struct value *index_value,
                                        struct ui_file *stream,
 
 /* Print the index of an array element using the C99 syntax.  */
 extern void default_print_array_index (struct value *index_value,
                                        struct ui_file *stream,

-                                       int format,
-                                       enum val_prettyprint pretty);
+                                      const struct value_print_options *options);

 
 /* Return non-zero if TYPE should be passed (and returned) by
    reference at the language level.  */
 
 /* Return non-zero if TYPE should be passed (and returned) by
    reference at the language level.  */


@@ -470,4 +622,121 @@ int language_pass_by_reference (struct type *type);
    independent of this.  */
 int default_pass_by_reference (struct type *type);
 
    independent of this.  */
 int default_pass_by_reference (struct type *type);
 

+/* The default implementation of la_print_typedef.  */
+void default_print_typedef (struct type *type, struct symbol *new_symbol,
+                           struct ui_file *stream);
+
+/* Default name hashing function.  */
+
+/* Produce an unsigned hash value from SEARCH_NAME that is consistent
+   with strcmp_iw, strcmp, and, at least on Ada symbols, wild_match.
+   That is, two identifiers equivalent according to any of those three
+   comparison operators hash to the same value.  */
+extern unsigned int default_search_name_hash (const char *search_name);
+
+void c_get_string (struct value *value,
+                  gdb::unique_xmalloc_ptr<gdb_byte> *buffer,
+                  int *length, struct type **char_type,
+                  const char **charset);
+
+/* The default implementation of la_symbol_name_matcher.  Matches with
+   strncmp_iw.  */
+extern bool default_symbol_name_matcher
+  (const char *symbol_search_name,
+   const lookup_name_info &lookup_name,
+   completion_match_result *comp_match_res);
+
+/* Get LANG's symbol_name_matcher method for LOOKUP_NAME.  Returns
+   default_symbol_name_matcher if not set.  LANG is used as a hint;
+   the function may ignore it depending on the current language and
+   LOOKUP_NAME.  Specifically, if the current language is Ada, this
+   may return an Ada matcher regardless of LANG.  */
+symbol_name_matcher_ftype *get_symbol_name_matcher
+  (const language_defn *lang, const lookup_name_info &lookup_name);
+
+/* The languages supported by GDB.  */
+
+extern const struct language_defn auto_language_defn;
+extern const struct language_defn unknown_language_defn;
+extern const struct language_defn minimal_language_defn;
+
+extern const struct language_defn ada_language_defn;
+extern const struct language_defn asm_language_defn;
+extern const struct language_defn c_language_defn;
+extern const struct language_defn cplus_language_defn;
+extern const struct language_defn d_language_defn;
+extern const struct language_defn f_language_defn;
+extern const struct language_defn go_language_defn;
+extern const struct language_defn m2_language_defn;
+extern const struct language_defn objc_language_defn;
+extern const struct language_defn opencl_language_defn;
+extern const struct language_defn pascal_language_defn;
+extern const struct language_defn rust_language_defn;
+
+/* Save the current language and restore it upon destruction.  */
+
+class scoped_restore_current_language
+{
+public:
+
+  explicit scoped_restore_current_language ()
+    : m_lang (current_language->la_language)
+  {
+  }
+
+  ~scoped_restore_current_language ()
+  {
+    set_language (m_lang);
+  }
+
+  scoped_restore_current_language (const scoped_restore_current_language &)
+      = delete;
+  scoped_restore_current_language &operator=
+      (const scoped_restore_current_language &) = delete;
+
+private:
+
+  enum language m_lang;
+};
+
+/* If language_mode is language_mode_auto,
+   then switch current language to the language of SYM
+   and restore current language upon destruction.
+
+   Else do nothing.  */
+
+class scoped_switch_to_sym_language_if_auto
+{
+public:
+
+  explicit scoped_switch_to_sym_language_if_auto (const struct symbol *sym)
+  {
+    if (language_mode == language_mode_auto)
+      {
+       m_lang = current_language->la_language;
+       m_switched = true;
+       set_language (sym->language ());
+      }
+    else
+      {
+       m_switched = false;
+       /* Assign to m_lang to silence a GCC warning.  See
+          https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635.  */
+       m_lang = language_unknown;
+      }
+  }
+
+  ~scoped_switch_to_sym_language_if_auto ()
+  {
+    if (m_switched)
+      set_language (m_lang);
+  }
+
+  DISABLE_COPY_AND_ASSIGN (scoped_switch_to_sym_language_if_auto);
+
+private:
+  bool m_switched;
+  enum language m_lang;
+};
+

 #endif /* defined (LANGUAGE_H) */
 #endif /* defined (LANGUAGE_H) */