one of the atomic type specifiers
short-float
,
single-float
,
double-float
,
or long-float
,
or else some other type specifier defined
by the implementation to be acceptable.
The symbol single-float
.
Controls the floating-point format that is to be used when reading a
floating-point number that has no exponent marker or that has
e
or E
for an exponent marker. Other exponent markers
explicitly prescribe the floating-point format to be used.
The printer uses *read-default-float-format*
to guide the
choice of exponent markers when printing floating-point numbers.
(let ((*read-default-float-format* 'double-float)) (read-from-string "(1.0 1.0e0 1.0s0 1.0f0 1.0d0 1.0L0)")) → (1.0 1.0 1.0 1.0 1.0 1.0) ;Implementation has float format F. → (1.0 1.0 1.0s0 1.0 1.0 1.0) ;Implementation has float formats S and F. → (1.0d0 1.0d0 1.0 1.0 1.0d0 1.0d0) ;Implementation has float formats F and D. → (1.0d0 1.0d0 1.0s0 1.0 1.0d0 1.0d0) ;Implementation has float formats S, F, D. → (1.0d0 1.0d0 1.0 1.0 1.0d0 1.0L0) ;Implementation has float formats F, D, L. → (1.0d0 1.0d0 1.0s0 1.0 1.0d0 1.0L0) ;Implementation has formats S, F, D, L.