8ad9357a7d
Some new features in version 3.1:
1. Block structure of the program is now kept track of, and proper
nesting of blocks is checked.
2. New check for modification of a DO index-variable within the
range of the loop.
3. New option -style to allow extra-picky warnings about obsolescent
or old-fashioned programming constructions.
4. Limited support for attribute-based type declarations (using ::).
See the manual for limitations on the accepted syntax. Note that
this new feature should be seen as a first step toward full
support for Fortran 90 type declarations, but it is not there
yet. The level of support may be sufficient for novice
programmers, but it is not yet ready for serious use.
5. Some implementation changes were made for faster execution. The
improvement in speed is greatest for small and medium-sized
programs, which are now processed about 2 times faster.
Bugs fixed in patch 1:
1. Erroneously reported "Block not closed when END statement
encountered" at end of an unnamed block data subprogram.
2. Under -pretty=embedded-space, warned of embedded space between
slashes in
COMMON / / X, Y, Z
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