(m4.info) Dumpdef

 
 Displaying macro definitions
 ============================
 
    If you want to see what a name expands into, you can use the builtin
 `dumpdef':
 
      dumpdef(...)
 
 which accepts any number of arguments.  If called without any arguments,
 it displays the definitions of all known names, otherwise it displays
 the definitions of the names given.  The output is printed directly on
 the standard error output.
 
    The expansion of `dumpdef' is void.
 
      define(`foo', `Hello world.')
      =>
      dumpdef(`foo')
      error-->foo:	`Hello world.'
      =>
      dumpdef(`define')
      error-->define:	<define>
      =>
 
    The last example shows how builtin macros definitions are displayed.
 
     Debug Levels for information on controlling the details of
 the display.

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