JSON-Fortran kind definitions.
-DUSE_UCS4 is an optional preprocessor flag.
When present, Unicode support is enabled. Note that this
is currently only supported with the gfortran compiler.
Example: gfortran -DUSE_UCS4 ...
The documentation given here assumes USE_UCS4 is not defined.
CK and CDK are the JSON-Fortran character kind and JSON-Fortran default
character kind respectively. Client code MUST ensure characters of kind=CK
are used for all character variables and strings passed to the JSON-Fortran
library EXCEPT for file names which must be of 'DEFAULT' character kind,
provided here as CDK. In particular, any variable that is a: json path, string
value or object name passed to the JSON-Fortran library MUST be of type CK.
Most string literal constants of default kind are fine to pass as arguments to
JSON-Fortran procedures since they have been overloaded to accept intent(in)
character arguments of the default (CDK) kind. If you find a procedure which does
not accept an intent(in) literal string argument of default kind, please
file an issue on GitHub.
The default real kind (RK) and the default integer kind (IK) can be
changed using optional preprocessor flags. This library was built with kinds:
real(kind=real64) [8 bytes]
and
integer(kind=int32) [4 bytes]
.
| Type | Visibility | Attributes | Name | Initial | |||
|---|---|---|---|---|---|---|---|
| integer, | public, | parameter | :: | CDK | = | selected_char_kind('DEFAULT') | Processor dependendant ‘DEFAULT’ character kind. This is 1 byte for the Intel and Gfortran compilers. |
| integer, | public, | parameter | :: | CK | = | selected_char_kind(json_fortran_string_kind) | Default character kind used by JSON-Fortran. If ISO 10646 (UCS4) support is available, use that, otherwise, gracefully fall back on ‘DEFAULT’ characters. Currently only gfortran >= 4.9.2 will correctly support UCS4 which is stored in 4 bytes. (and perhaps others). |
| integer, | public, | parameter | :: | IK | = | int32 | Default integer kind if not specified [4 bytes] |
| integer, | public, | parameter | :: | LK | = | logical_kinds(min(3, size(logical_kinds))) | Default logical kind. This is 4 bytes for the Intel and Gfortran compilers (and perhaps others). The declaration ensures a valid kind if the compiler doesn’t have a logical_kinds(3). |
| integer, | public, | parameter | :: | RK | = | real64 | Default real kind if not specified [8 bytes] |
| character(kind=CDK,len=*), | private, | parameter | :: | json_fortran_string_kind | = | 'DEFAULT' | String kind preprocessor macro. this is the string kind to use unless compiling with GFortran AND UCS4/ISO 10646 support is requested |