code.delx.au - gnu-emacs/blob - lispref/errors.texi

   1 @c -*-texinfo-*-
   2 @c This is part of the GNU Emacs Lisp Reference Manual.
   3 @c Copyright (C) 1990, 1991, 1992, 1993, 1999, 2002, 2003, 2004,
   4 @c   2005, 2006 Free Software Foundation, Inc.
   5 @c See the file elisp.texi for copying conditions.
   6 @setfilename ../info/errors
   7 @node Standard Errors, Standard Buffer-Local Variables, GNU Emacs Internals, Top
   8 @appendix Standard Errors
   9
  10   Here is the complete list of the error symbols in standard Emacs,
  11 grouped by concept.  The list includes each symbol's message (on the
  12 @code{error-message} property of the symbol) and a cross reference to a
  13 description of how the error can occur.
  14
  15   Each error symbol has an @code{error-conditions} property that is a
  16 list of symbols.  Normally this list includes the error symbol itself
  17 and the symbol @code{error}.  Occasionally it includes additional
  18 symbols, which are intermediate classifications, narrower than
  19 @code{error} but broader than a single error symbol.  For example, all
  20 the errors in accessing files have the condition @code{file-error}.  If
  21 we do not say here that a certain error symbol has additional error
  22 conditions, that means it has none.
  23
  24   As a special exception, the error symbol @code{quit} does not have the
  25 condition @code{error}, because quitting is not considered an error.
  26
  27   @xref{Errors}, for an explanation of how errors are generated and
  28 handled.
  29
  30 @table @code
  31 @item @var{symbol}
  32 @var{string}; @var{reference}.
  33
  34 @item error
  35 @code{"error"}@*
  36 @xref{Errors}.
  37
  38 @item quit
  39 @code{"Quit"}@*
  40 @xref{Quitting}.
  41
  42 @item args-out-of-range
  43 @code{"Args out of range"}@*
  44 This happens when trying to access an element beyond the range of a
  45 sequence or buffer.@*
  46 @xref{Sequences Arrays Vectors}, @xref{Text}.
  47
  48 @item arith-error
  49 @code{"Arithmetic error"}@*
  50 @xref{Arithmetic Operations}.
  51
  52 @item beginning-of-buffer
  53 @code{"Beginning of buffer"}@*
  54 @xref{Character Motion}.
  55
  56 @item buffer-read-only
  57 @code{"Buffer is read-only"}@*
  58 @xref{Read Only Buffers}.
  59
  60 @item coding-system-error
  61 @code{"Invalid coding system"}@*
  62 @xref{Lisp and Coding Systems}.
  63
  64 @item cyclic-function-indirection
  65 @code{"Symbol's chain of function indirections\@* contains a loop"}@*
  66 @xref{Function Indirection}.
  67
  68 @item cyclic-variable-indirection
  69 @code{"Symbol's chain of variable indirections\@* contains a loop"}@*
  70 @xref{Variable Aliases}.
  71
  72 @item end-of-buffer
  73 @code{"End of buffer"}@*
  74 @xref{Character Motion}.
  75
  76 @item end-of-file
  77 @code{"End of file during parsing"}@*
  78 Note that this is not a subcategory of @code{file-error},
  79 because it pertains to the Lisp reader, not to file I/O.@*
  80 @xref{Input Functions}.
  81
  82 @item file-already-exists
  83 This is a subcategory of @code{file-error}.@*
  84 @xref{Writing to Files}.
  85
  86 @item file-date-error
  87 This is a subcategory of @code{file-error}.  It occurs when
  88 @code{copy-file} tries and fails to set the last-modification time of
  89 the output file.@*
  90 @xref{Changing Files}.
  91
  92 @item file-error
  93 We do not list the error-strings of this error and its subcategories,
  94 because the error message is normally constructed from the data items
  95 alone when the error condition @code{file-error} is present.  Thus,
  96 the error-strings are not very relevant.  However, these error symbols
  97 do have @code{error-message} properties, and if no data is provided,
  98 the @code{error-message} property @emph{is} used.@*
  99 @xref{Files}.
 100
 101 @item file-locked
 102 This is a subcategory of @code{file-error}.@*
 103 @xref{File Locks}.
 104
 105 @item file-supersession
 106 This is a subcategory of @code{file-error}.@*
 107 @xref{Modification Time}.
 108
 109 @item ftp-error
 110 This is a subcategory of @code{file-error}, which results from problems
 111 in accessing a remote file using ftp.@*
 112 @xref{Remote Files,,, emacs, The GNU Emacs Manual}.
 113
 114 @item invalid-function
 115 @code{"Invalid function"}@*
 116 @xref{Function Indirection}.
 117
 118 @item invalid-read-syntax
 119 @code{"Invalid read syntax"}@*
 120 @xref{Printed Representation}.
 121
 122 @item invalid-regexp
 123 @code{"Invalid regexp"}@*
 124 @xref{Regular Expressions}.
 125
 126 @item mark-inactive
 127 @code{"The mark is not active now"}@*
 128 @xref{The Mark}.
 129
 130 @item no-catch
 131 @code{"No catch for tag"}@*
 132 @xref{Catch and Throw}.
 133
 134 @item scan-error
 135 @code{"Scan error"}@*
 136 This happens when certain syntax-parsing functions
 137 find invalid syntax or mismatched parentheses.@*
 138 @xref{List Motion}, and @ref{Parsing Expressions}.
 139
 140 @item search-failed
 141 @code{"Search failed"}@*
 142 @xref{Searching and Matching}.
 143
 144 @item setting-constant
 145 @code{"Attempt to set a constant symbol"}@*
 146 The values of the symbols @code{nil} and @code{t},
 147 and any symbols that start with @samp{:},
 148 may not be changed.@*
 149 @xref{Constant Variables, , Variables that Never Change}.
 150
 151 @item text-read-only
 152 @code{"Text is read-only"}@*
 153 This is a subcategory of @code{buffer-read-only}.@*
 154 @xref{Special Properties}.
 155
 156 @item undefined-color
 157 @code{"Undefined color"}@*
 158 @xref{Color Names}.
 159
 160 @item void-function
 161 @code{"Symbol's function definition is void"}@*
 162 @xref{Function Cells}.
 163
 164 @item void-variable
 165 @code{"Symbol's value as variable is void"}@*
 166 @xref{Accessing Variables}.
 167
 168 @item wrong-number-of-arguments
 169 @code{"Wrong number of arguments"}@*
 170 @xref{Classifying Lists}.
 171
 172 @item wrong-type-argument
 173 @code{"Wrong type argument"}@*
 174 @xref{Type Predicates}.
 175 @end table
 176
 177   These kinds of error, which are classified as special cases of
 178 @code{arith-error}, can occur on certain systems for invalid use of
 179 mathematical functions.
 180
 181 @table @code
 182 @item domain-error
 183 @code{"Arithmetic domain error"}@*
 184 @xref{Math Functions}.
 185
 186 @item overflow-error
 187 @code{"Arithmetic overflow error"}@*
 188 This is a subcategory of @code{domain-error}.@*
 189 @xref{Math Functions}.
 190
 191 @item range-error
 192 @code{"Arithmetic range error"}@*
 193 @xref{Math Functions}.
 194
 195 @item singularity-error
 196 @code{"Arithmetic singularity error"}@*
 197 This is a subcategory of @code{domain-error}.@*
 198 @xref{Math Functions}.
 199
 200 @item underflow-error
 201 @code{"Arithmetic underflow error"}@*
 202 This is a subcategory of @code{domain-error}.@*
 203 @xref{Math Functions}.
 204 @end table
 205
 206 @ignore
 207    arch-tag: 717c6048-5d9d-4c7d-9a62-df57390b6f19
 208 @end ignore