lang/seed7: 05_20230709

20230709:
- Explanations about the initialization with 'is', the 'return'
  declaration construct and the meaning of dollar signs have been
  added or improved in the FAQ.
- A chapters about arrays has been added to the tutorial.
- In the manual, chapters about variants of for-each loops have been
  added or improved.
- A chapter about the exception GRAPHIC_ERROR has been added to the
  manual.
- The compiler (s7c.sd7) has been improved:
  - The generated code for array indexing that always raises
    INDEX_ERROR, has been improved to be accepted by clang. A cast to
    the desired type has been added.
  - The code generation for the hash set functions card() and rand()
    has been improved to support temporary sets.
  - Spezialized code is now generated, if the hash set function rand()
    is used with constant sets.
  - The functions strHeadAssign and strTailAssign are used now. They
    are always called like this: aString = strHeadAssign(aString, pos);
- In the library gzip.s7i the functions length() and tell() have been
  added for a gzipWriteFile.
- In the library tar.s7i the function putFile() has been improved to
  check for seekable() before aplying seek().
- The function pemObject() which creates a PEM object from 'pemType'
  and 'content' has been added to pem.s7i.
- Support for the generation of non-self-signed certificates has been
  added to the x509cert.s7i library.
- Support for X509 extensions has been added to the x509cert.s7i
  library.
- A function to create an x509Name has been added to x509cert.s7i.
- In x509cert.s7i several things have been renamed:
  - The types validityType and nameType have been renamed to
    x509Validity and x509Name respectively.
  - The function getName() has been renamed to getX509Name().
  - The parameter encryptionKey has been renamed to issuerKey.
- In x509cert.s7i the type x509cert is deprecated now. The type
  x509Cert should be used instead.
- In asn1.s7i and x509cert.s7i parameters and result variables have
  been renamed from 'stri' to 'asn1'.
- In pkcs1.s7i an additional function to generate a RSA key pair has
  been added.
- Now 'in varfunc' call-by-name parameters can be specified with 'in'
  and 'ref'. This is done in the library seed7_05.s7i by defining
  IN_PARAM_IS_REFERENCE(varfunc aType).
- In seed7_05.s7i the boolean condition parameters of loops have been
  changed to be defined with 'ref'. This corresponds to the fact that
  changing a condition variable in the loop body can terminate the
  loop.
- The test suite has been improved to increase the code coverage.
- A test program for enumerations (chkenum.sd7) has been added.
- Tests have been added to chkbig.sd7:
  - Tests for bigInteger comparisons (=, <>, <, <=, >=, > and compare).
  - Tests for the optimization of ord(a mod b).
  - Tests for the multiplication of a constant with a bigInteger.
  - Tests for the divRem operator and for the rand and gcd functions.
  - Tests for the modulus of a bigInteger by a power of two.
- Tests have been added to chkbin.sd7:
  - Tests for the bin64 &, | and >< operators.
  - Tests for the optimization of bin64(a mod b).
  - Tests for bin64 shift operator have been improved.
- Tests have been added to chkbst.sd7:
  - Tests for bstring length.
  - Improve tests for bstring assignments.
- Tests have been added to chkchr.sd7:
  - Tests for char literals and conversions
  - Tests for the char functions succ(), pred(), lower() and upper().
- Tests in chkhsh.sd7 have been improved:
  - Tests for hash tables with enumeration type keys and values have
    been added.
  - Tests for hash tables with bstring keys and values have been added.
  - Tests for hash tables with bitset keys and values have been added.
  - Tests for hash keys() and values() function have been added.
- Tests in chkstr.sd7 have been improved:
  - Tests for c_literal() have been added.
  - Tests for string head (stri[.. stop]) have been added.
  - Tests for string tail (stri[start ..]) have been added.
  - Tests for the string pos(), rpos() and replace() functions have
    been added. These tests trigger a Boyer-Moore string search.
  - Tests for fromUtf8() have been added.
  - Tests for lower() and upper() have been added.
  - Tests for string assignment have been added.
- Tests for the expression A * B ** C have been added to chkint.sd7
  and chkovf.sd7.
- Tests for string head (stri[.. n]) and string tail (stri[n ..]) have
  been added to chkidx.sd7.
- In chkset.sd7 tests for the hash set functions card(), rand() and
  toArray() have been added. Tests for the operators 'in' and 'not in'
  have been added as well.
- In chkprc.sd7 tests for for-until loops have been added.
- Tests for the type clib_file and for the functions seekable(),
  tell(), bigTell() and seek() have been added to chkfil.sd7.
- The handling of the version level (the last number in the version
  string) has been improved:
  - The file src/level_rl.h which contains the release level has been
    introduced.
  - The files src/level.h and src/level_bk.h have been removed from the
    release.
  - In the makefiles the target distclean has been improved to remove
    src/level.h and src/level_bk.h.
  - The program levelup.c has been improved to maintain the file
    level.h. If level_rl.h has changed it will be copied to level.h. If
    there is no change in level_rl.h every compilation of s7 will
    increment the level.
  - The program wrdepend.c has been improved to check if level.h is
    missing. In this case, level_rl.h is copied to level.h.
  - The minor version number of s7 and s7c has been incremented.
- In seed7_05.s7i, forloop.s7i, chkarr.sd7, chkbig.sd7, chkbin.sd7,
  chkbst.sd7, chkfil.sd7, chkflt.sd7, chkidx.sd7, chkint.sd7,
  chkovf.sd7, chkset.sd7 and chkstr.sd7 'ref func' parameters have been
  replaced with 'in func' parameters.
- In chk_all.sd7, chkarr.sd7, chkfil.sd7, chkidx.sd7, chkovf.sd7 and
  chkstr.sd7 'ref proc' parameters have been replaced with 'in proc'
  parameters.
- In str_rtl.c the functions strHeadAssign and strTailAssign have been
  introduced. These functions leave the string parameter intact in case
  of an error.
- In str_rtl.c the function strHeadTemp has been refactored to assume
  that the string parameter is always tempory and can be freed in case
  of an error.
- Documentation comments have been improved in pem.s7i and
  x509cert.s7i.

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