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+_dnl__								-*- Texinfo -*-
+_dnl__ Copyright (c) 1988 1989 1990 1991 Free Software Foundation, Inc.
+_dnl__ This file is part of the source for the GDB manual.
+_dnl__ $Id$
+@node Symbols, Altering, Data, Top
+@chapter Examining the Symbol Table
+
+The commands described in this section allow you to inquire about the
+symbols (names of variables, functions and types) defined in your
+program.  This information is inherent in the text of your program and
+does not change as the program executes.  _GDBN__ finds it in your
+program's symbol table, in the file indicated when you started _GDBN__ 
+(@pxref{File Options}), or by one of the file-management commands
+(@pxref{Files}).
+
+@table @code
+@item info address @var{symbol}
+@kindex info address
+Describe where the data for @var{symbol} is stored.  For a register
+variable, this says which register it is kept in.  For a non-register
+local variable, this prints the stack-frame offset at which the variable
+is always stored.
+
+Note the contrast with @samp{print &@var{symbol}}, which does not work
+at all for a register variables, and for a stack local variable prints
+the exact address of the current instantiation of the variable.
+
+@item whatis @var{exp}
+@kindex whatis
+Print the data type of expression @var{exp}.  @var{exp} is not
+actually evaluated, and any side-effecting operations (such as
+assignments or function calls) inside it do not take place.
+@xref{Expressions}.
+
+@item whatis
+Print the data type of @code{$}, the last value in the value history.
+
+@item ptype @var{typename}
+@kindex ptype
+Print a description of data type @var{typename}.  @var{typename} may be
+the name of a type, or for C code it may have the form
+@samp{struct @var{struct-tag}}, @samp{union @var{union-tag}} or
+@samp{enum @var{enum-tag}}.@refill
+
+@item ptype @var{exp}
+Print a description of the type of expression @var{exp}.  @code{ptype}
+differs from @code{whatis} by printing a detailed description, instead of just
+the name of the type.  For example, if your program declares a variable
+as
+@example
+struct complex {double real; double imag;} v;
+@end example
+@noindent
+compare the output of the two commands:
+@example
+(_GDBP__) whatis v
+type = struct complex
+(_GDBP__) ptype v
+type = struct complex {
+    double real;
+    double imag;
+}
+@end example
+
+@item info types @var{regexp}
+@itemx info types
+@kindex info types 
+Print a brief description of all types whose name matches @var{regexp}
+(or all types in your program, if you supply no argument).  Each
+complete typename is matched as though it were a complete line; thus,
+@samp{i type value} gives information on all types in your program whose
+name includes the string @code{value}, but @samp{i type ^value$} gives
+information only on types whose complete name is @code{value}.
+
+This command differs from @code{ptype} in two ways: first, like
+@code{whatis}, it does not print a detailed description; second, it
+lists all source files where a type is defined.
+
+@item info source
+@kindex info source
+Show the name of the current source file---that is, the source file for
+the function containing the current point of execution.
+
+@item info sources
+@kindex info sources
+Print the names of all source files in the program for which there is
+debugging information, organized into two lists: those for which symbols
+have been read in, and those for which symbols will be read in on
+demand.
+@c FIXME: above passive AND awkward!
+
+@item info functions
+@kindex info functions
+Print the names and data types of all defined functions.
+
+@item info functions @var{regexp}
+Print the names and data types of all defined functions
+whose names contain a match for regular expression @var{regexp}.
+Thus, @samp{info fun step} finds all functions whose names
+include @code{step}; @samp{info fun ^step} finds those whose names
+start with @code{step}.
+
+@item info variables
+@kindex info variables
+Print the names and data types of all variables that are declared
+outside of functions (i.e., excluding local variables).
+
+@item info variables @var{regexp}
+Print the names and data types of all variables (except for local
+variables) whose names contain a match for regular expression
+@var{regexp}.
+
+
+@ignore
+This was never implemented.
+@item info methods
+@itemx info methods @var{regexp}
+@kindex info methods
+The @code{info methods} command permits the user to examine all defined
+methods within C++ program, or (with the @var{regexp} argument) a
+specific set of methods found in the various C++ classes.  Many
+C++ classes provide a large number of methods.  Thus, the output
+from the @code{ptype} command can be overwhelming and hard to use.  The
+@code{info-methods} command filters the methods, printing only those
+which match the regular-expression @var{regexp}.
+@end ignore
+
+@item printsyms @var{filename}
+@kindex printsyms
+Write a complete dump of the debugger's symbol data into the
+file @var{filename}.
+@end table