_AT_CHECK_CALC_ERROR([$1], [1//2], [15],
[1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
_AT_CHECK_CALC_ERROR([$1], [error], [4],
_AT_CHECK_CALC_ERROR([$1], [1//2], [15],
[1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
_AT_CHECK_CALC_ERROR([$1], [error], [4],