Seed7 is a general purpose programming language designed by Thomas Mertes. Seed7 project is a higher level language compared to Ada, C/C and Java.

The Seed7 interpreter and the example programs are open-source software. An open-source Seed7 compiler is also under development.

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 as a direct descendant of any other programming language.


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Here are some key features of "Seed7":

· 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
· Strong typing
· exception handling
· overloading of procedures/functions/operators/statements
· Various predefined types like resizable arrays, hashes, bitsets, structs, color, time, duration, etc.
· Runs under linux and various unix versions. A windows version is under developent
· The interpreter and the example programs use the GPL license, while the runtime library uses the LGPL license.

What's New in This Release: [ read full changelog ]

· FAQ answers, explaining call-by-name and how it is implemented in Seed7, were added.
· The "ftpserv.sd7" program was improved to work with various FTP client programs.
· The speed of 'socLineRead' (getln() for sockets) in "soc_rtl.c" was improved.
· The Unicode support of "ftp.s7i" and "ftp7.sd7" was improved.
· The compiler was improved to generate optimized code for the the @:= operator.
· Test cases for the @:= operator were added to "chkstr.sd7".
· The program "chkccomp.c" was changed to include "version.h" and to define OS_OFF_T_SIZE.
· The function 'str' for 'fileMode' was improved.