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Diffstat (limited to 'gcc/fortran/gfortran.texi')
| -rw-r--r-- | gcc/fortran/gfortran.texi | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/fortran/gfortran.texi b/gcc/fortran/gfortran.texi index e65c2decad2..6de6c9bfeeb 100644 --- a/gcc/fortran/gfortran.texi +++ b/gcc/fortran/gfortran.texi @@ -1471,6 +1471,8 @@ compatibility extensions along with those enabled by @option{-std=legacy}. * .XOR. operator:: * Bitwise logical operators:: * Extended I/O specifiers:: +* Legacy PARAMETER statements:: +* Default exponents:: @end menu @node Old-style kind specifications @@ -2696,6 +2698,31 @@ supported on other systems. @end table +@node Legacy PARAMETER statements +@subsection Legacy PARAMETER statements +@cindex PARAMETER + +For compatibility, GNU Fortran supports legacy PARAMETER statements without +parentheses with @option{-std=legacy}. A warning is emitted if used with +@option{-std=gnu}, and an error is acknowledged with a real Fortran standard +flag (@option{-std=f95}, etc...). These statements take the following form: + +@smallexample +implicit real (E) +parameter e = 2.718282 +real c +parameter c = 3.0e8 +@end smallexample + +@node Default exponents +@subsection Default exponents +@cindex exponent + +For compatibility, GNU Fortran supports a default exponent of zero in real +constants with @option{-fdec}. For example, @code{9e} would be +interpreted as @code{9e0}, rather than an error. + + @node Extensions not implemented in GNU Fortran @section Extensions not implemented in GNU Fortran @cindex extensions, not implemented |