Seed7 05.20090607

Seed7 is a general purpose programming language designed by Thomas Mertes. The Seed7 interpreter and the example programs are open-source software. There is also an open-source Seed7 compiler. The compiler compiles Seed7 programs to C programs which are subsequently compiled to machine code.
In Seed7 new statements and operators can be declared easily. Functions with type results and type parameters are more elegant than a template or generics concept.
Object orientation is used where it brings advantages and not in places where other solutions are more obvious. Although Seed7 contains several concepts of other programming languages it is generally not considered to be a direct descendant of any other a

Main features:
- User defined statements and operators.
- Types are first class objects (Templates and generics can be defined easily without special syntax).
- Predefined constructs like arrays or for-loops are declared in the language itself.
- Object orientation with interfaces and multiple dispatch.
- Static type checking and no automatic casts.
- Support for bigInteger and bigRational numbers which have unlimited size.
- exception handling
- overloading of procedures/functions/operators/statements
- Various predefined types like resizable arrays, hashes, bitsets, structs, color, time, duration, etc.
- Runs under linux, various unix versions and windows.
- The interpreter and the example programs use the GPL license, while the runtime library uses the LGPL license.

Enhancements
- The chkint.sd7 program was improved with additional
- checks for the binomial coefficient (for values of k greater
- than n and for negative values of n) and bitLength.
- The chkstr.sd7 program was improved with additional
- checks for string subranges ([ A .. B ] and [ A len B ]).
- An error concerning array subranges was fixed in the
- function arr_range (arrlib.c).
- Several changes in the interpreter and the runtime library
- were done to reduce the number of warnings generated by
- the C compiler.
- Occurrences of float in the compiler (comp.sd7) were
- replaced with floattype.
- Functions to compute the most and least significant bit of
- unsigned integers with a width of 8, 16, 32 and 64 bits were
- added to the file int_rtl.c.
- The new functions ***MostSignificantBit and
***LeastSignificantBit were used in the following functions:
- intBitLength, intLog2, bigBitLength, bigDiv, bigLog2,
- bigLowestSetBit, bigMDiv, bigMod, bigRand, bigRem,
- setCmp, setMax, setMin and setRand.