Seed7 Release 2020-05-02

Hello,


I have released a new version of Seed7: seed7_05_20200502.tgz
The download is here: https://sourceforge.net/projects/seed7/files
In the Seed7 programming language new statements and operators can
be declared easily. Types are first class objects and therefore
templates/generics need no special syntax. Object orientation is used
when it brings advantages and not in places when other solutions are
more obvious.


Seed7 is covered by the GPL (and LGPL for the Seed7 runtime library).


Changelog:
- As suggested by Zachary Menzies a detection of more modifier keys has
    been added. E.g.: KEY_SHIFT_LOCK and KEY_NUM_LOCK. These modifier
    keys have a state. The state of KEY_SHIFT_LOCK can be retrieved with
    buttonPressed(KEYBOARD, KEY_SHIFT_LOCK_ON).
- Several new keys and key combinations such as KEY_PRINT, KEY_PAUSE,
    KEY_ALT_LEFT and KEY_SFT_MENU have been added to keybd.s7i. Existing
    definitions in keybd.s7i have been refactored. Key names in
    keydescr.s7i have been updated.
- The program gkbd.sd7 has been improved to show the new capabilies of
    the keybord interface.
- The bas7.sd7 (basic interpreter) example program has been improved.
    Support for the predefined subprograms CHAR, CLEAR, COLOR, HCHAR,
    KEY, SCREEN and VCHAR and for the function SEG$ has been added.
- The bitmap font font8x8 has been added. This is a font with 8x8 pixel
    used by the TI-99/4A homecomputer.
- The functions line() and column() have been added to pixmap_file.s7i.
- The function replace1() has been added to string.s7i.
- In the manual the chapters about types and the keyboard have been
    improved.
- The compiler has been improved to link database libraries only if
    they are needed.
- The compiler has been improved to use builtin functions of the C
    compiler (if available) to do integer overflow checks. This reduces
    the runtime of the xz (lzma2) decompression by 4% (measured with gcc
    and valgrind, when decompressing a binary Seed7 package).
- The compiler has been improved to use a better approach to test for
    integer overflow of addition and subtraction, if no builtin functions
    are available. This reduces the runtime of the xz (lzma2)
    decompression by 0.8% (measured with gcc and valgrind, when
    decompressing a binary Seed7 package).
- The compiler has been improved to optionally suppress the generation
    of checks for integer division by zero with the option -sd.
- The simple function profiling of the Seed7 compiler has been improved
    to write the place and the name of the Seed7 function and to avoid
    a C compiler error about "too many initializers".
- The compiler has been improved to write a warning if there is a catch
    statement for an exception although the checks for this exception
    have been suppressed (with the option -s).
- The compiler has been improved to work correct for all corner cases
    of the string operations [, mult and @:=.
- Testcases for the operators [, mult and @:= and for the functions
    pos() and rpos() have been added to chkstr.sd7.
- Testcases for the exception RANGE_ERROR have been added to
    chkbig.sd7. The function bigInteger() and the operators radix, RADIX
    and parse are checked now, if they correctly raise RANGE_ERROR.
- Testcases for the exception RANGE_ERROR have been added to
    chkint.sd7. The functions bytes() and integer() and the operators
    radix, RADIX, sci and parse are checked now, if they correctly raise
    RANGE_ERROR.
- Testcases for the exception NUMERIC_ERROR have been added to
    chkint.sd7. The operators div, rem, mdiv, mod and ** are checked
    now, if they correctly raise NUMERIC_ERROR.
- A lot of testcases has been added to chkint.sd7 and chkovf.sd7 in
    the function check_reduced_overflow_checking_for_sums().
- In comp/big_act.s7i the function process_const_big_ipow has been
    improved to allow that the check for a negative exponent can be
    optionally omitted.
- In chkovf.sd7 the checks for the operators rem and mod have been
    improved to allow that the operators return the correct result
    instead of raising OVERFLOW_ERROR.
- Index access in comp/str_act.s7i and comp/bst_act.s7i has been
    improved to work also for the index integer.first (now the index is
    casted to (unsigned) and afterwards 1 is subtracted).
- In comp/intrange.s7i the function getIntRange has been improved to
    return better ranges for INT_ABS and INT_NEGATE.
- The keyboard driver gkb_x11.c has been improved to support new keys
    and key combinations. Additionally the modifier state is synched now
    with the keypresses. This allows reading a modifier key state (e.g.
    (control has been pressed) from the moment when the main key (e.g.
    the letter A) was pressed.
- The program chkccomp.c has been improved to determine the values
    CHECK_INT_DIV_ZERO_BY_ZERO, HAS_BUILTIN_OVERFLOW_OPERATIONS and
    SYSTEM_DATABASE_LIBS. The logic to determine the values
    CHECK_INT_DIV_BY_ZERO, CHECK_INT_REM_BY_ZERO and
    CHECK_INT_REM_ZERO_BY_ZERO has been improved.
- The configuration value CHECK_INT_DIV_ZERO_BY_ZERO,
    BUILTIN_ADD_OVERFLOW, BUILTIN_SUB_OVERFLOW, BUILTIN_MULT_OVERFLOW
    and SYSTEM_DATABASE_LIBS have been added to cc_conf.s7i, confval.sd7
    and cmd_rtl.c.
- Documentation comments have been added or improved in cc_conf.s7i,
    encoding.s7i, gzip.s7i, lzma.s7i, pixmap_file.s7i, scanfile.s7i,
    sql_base.s7i, string.s7i, xz.s7i, sigutl.c and striutl.c.


Regards,
Thomas Mertes


--
Seed7 Homepage: http://seed7.sourceforge.net
Seed7 - The extensible programming language: User defined statements
and operators, abstract data types, templates without special
syntax, OO with interfaces and multiple dispatch, statically typed,
interpreted or compiled, portable, runs under linux/unix/windows.

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