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by Parent and Childset Accessible Syntax Tree Language Interpreter change log
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v3.5   2018-03-31

The license is now LGPL instead of GPL.
32-bit and 64-bit Windows builds are now available separately.

v3.4   2016-04-09

Minimized the number of internal calls to exit.
Added internal function "copystring", "freestring" and "fgets".
Added parameter for context access in pcastli.ini.
Now the internal function "clear" frees arrays, lists and objects, but no more 
   the strings.
Windows builds are now compiled for Windows 10 instead of 8.
Cleared FPU stack before assembly calls for 32-bit builds.
Fixed memory leaks in libraries calls, printf, scanf, fprintf, fscanf, sprintf 
   and sscanf for 64-bit builds.

v3.3   2016-01-31

Replaced member "nb_childs" by "nb_children" in the object retournd by "info".
Added internal functions "detachnode", "swapnodes" and "osfamily".
Now function "treetocode" places a semicolon at the end previous statement in 
   a statement list if next statements begins with * or (.
The output of "codetotree" is now garbage collected.
Fixed issue of priority indirection not placed in parenthesis in "treetocode"
   function output.

v3.2.1   2016-01-21

Fixed the assign with indirection issue. 
Fixed the use of indirection arguments issue with internal functions 
   "fillobject", "setlength", "insert", "replace", "undefine", "fread", 
   "fgetpos", "remove" and "memtovar".
Fixed the use of ++ or -- operators on an indirection issue.

v3.2   2016-01-16

It's now possible to apply to an indirection the subscript operator, function 
   call and object member selection.
Added multiline comments: /* */.
Improved grammar: reduced number of shift/reduce conflicts.
Improved lexer: now there can't be anymore two consecutive calls to ungetc.
Fixed multiple indirection assign issue.

v3.1.1   2016-01-08

Fixed the built trees garbage collection issue.

v3.1   2016-01-05

Added modulo (%) operator.
Added internal functions "pushfront", "pushback", "popfront" and "popback".
Added an installer for Windows.
Fixed the element allocation size issue in "concat" function for a list.

v3.0   2015-12-24

In the current context, the variables of preceding contexts are now only visible 
   to the context of the current function.  The only other visible variable are 
   those of the global context.
The number of nested calls is now limited by the size of the stack.
A semicolon can now be placed at the end of any expression.
The "fgetc" function now returns an integer instead of a string.
A string type variable with a subscript for an assign can now receive a 
   character.
The fpos_t type content is now freed by the garbage collector only, instead of 
   being freed at the same time as the context.
Fixed the problem occurring when applying subseq to an array.
Fixed the heap corruption issue with "info" applied to a function definition
   node.

v2.7   2015-12-17

Added internal functions "codetotree", "exist", "createnode", "appendnode", 
   "insertnode" and "replacenode".
The second parameter of the internal function "treetocode" is now optional and 
   has "   " as default value.
Internal function "info" now returns an object.
Internal function "rmnode" now accepts a parent node of non-list type.
The subscript operator can now be applied to a string and the resulting value
   will be of "char" type.  Idem for a variable containing a string.
Improved identifier validation in "atovar" internal function.
The number of children nodes is now verified before the execution of a node.
Code with syntax error is no more executed after being parsed.

v2.6   2015-12-04

Added internal function "treetocode".
The internal function "gettype" now returns "node pointer" instead of 
   "reference" for a pointer to a node.
Made explicit the priority of the structure reference operator (.).
Fixed stack corruption issue with printf, scanf, fprintf, fscanf, sprintf 
   and sscanf.

v2.5   2014-11-23

Calls to dynamic-link library or a shared object library now return possible
   called function return values by type.
Cast operands can now be of non fundamental type.
Right hand side result before assign is no more duplicated.
Fixed the non display of library handles for 32-bit builds.
Fixed fillobject internal function node type / data type confusion.
Fixed 32-bit math operators with float operand data type error.
Fixed statements inside a source file not added for garbage collection.

v2.4   2012-11-11

Readded float variable type for library access.
Fixed allocated data double deletion conflicts in garbage collection.
Fixed floating point and double parameter passing to 64-bit Windows dlls.
Added even or lower than five parameters functions stack alignment in 64-bit 
   Windows dlls calls for speed optimized builds.

v2.3   2012-10-21

The interpreter can now be built for 64-bit Windows, 64-bit Linux and Mac OS X 
   Mountain Lion.  The code still compile for 32-bit Windows and 32-bit Linux.
The call of a function with only a return statement within another function does 
   not cause the top function to return anymore.
The reference operator "&" applied to a subscript inside a function does not
   cause the script to abort anymore.
The "vartomem" and "memtovar" internal functions can now receive results of the 
   reference operator.
Fixed "source" internal function calls in another function.
Added size_t variable type.
Removed float variable type.

v2.2   2012-03-06

Added internal functions "repeat", "vartomem", "memtovar", "memcpy", "memset", 
  "memclone" and "memory".
Added variable types "raw memory", "byte" and "memory address".
Calls to a dynamic-link library or a shared object library can now receive a raw
  memory argument.
Reference operator "&" can now be used in combination with subscript operator 
  for string and raw memory.
Indirection operator "*" applied on the left side operand of an assignation now 
  get the right value assigned to the variable referenced.
Fixed garbage collector pointer following issue.

v2.1.1   2012-02-03

Statements in a "return" call argument get now fully executed.

v2.1   2012-01-27

Added internal functions "alloc_copy" and "free".
"source" internal function can now read Windows text files (CR LF) on Linux.
"source" internal function can now be used inside a file read by this function.

v2.0.1   2012-01-08

Statements on the command line are no more deleted immediately after execution.
  They are deleted by the garbage collector when not referenced.
Fixed the "!=" operator issue.

v2.0   2011-12-26

Added C fundamental types: char, signed char, unsigned char, short, unsigned short,
  int, unsigned int, long, unsigned long, long long, unsigned long long, float and
  long double.
Added cast operator.
Added reference "&", indirection "*" and dereference "->" C operators.
Added pointer type to all PCASTL base types.  Also, pointer to pointer and so on.
Object, array and list member can now be used with ++ and -- operators.
Assignments of functions and code segments do now copy the command syntax tree, so
  statements on the command line are now deleted immediately after execution.
Added internal function "freetree".
Garbage collection does now manage strings, objects, arrays and lists.
String assignation from a variable to another now does not allocate and copy.
Added internal functions "strclone" and "strcpy".
Arguments for "scanf", "fscanf" and "sscanf" must now be passed as in C language.
Added internal functions "openlib", "getfuncpt" and "closelib" to allow calls to
  a dynamic-link library or a shared object library.
Removed internal functions "catlist", "listsize" and "sublist".

v1.10   2011-11-18

Internal function name search improved.
Added internal functions "atovar" and "vartoa".
"for" and "while" loops can now have blank control fields.

v1.9   2009-09-18

Added file pointer data type.
Added i/o internal functions "printf", "scanf", "fopen", "fclose", "fprintf", 
  "fscanf", "feof", "fread", "fwrite", "clearerr", "fgetpos", "fsetpos", 
  "ferror", "fgetc", "ungetc", "fflush", "fputc", "fseek", "ftell", "freopen",
  "rewind", "tmpfile", "sprintf" and "sscanf". 
Fixed multiple lines paste issue with Linux.
Added internal function "cls".
Strings now accept ASCII characters in octal and hex notation in escapes 
  sequences.
Logical operators AND, OR and NOT can now have node pointer and file pointer 
  operands.
Numbers can now be entered in hexadecimal format and those are taken as signed 
  integers.

v1.8   2009-04-04

Added object, array and chained list data types.  They are respectively 
  created by internal functions "names", "array" and "list".
Replaced internal function "catlist" by more flexible function "concat".
Replaced internal function "sublist" by more polyvalent function "subseq".
Replaced internal function "listsize" by more polyvalent function "length".
Added internal functions "setlength", "insert", "replace", "source", "strlen",
  "as_array", "as_list", "as_statements", "gettype", "undefine" and "abort".
Enabled string variable subscripting.
Lowered exponentiation operator precedence.
Fixed "for" initialization scope error.
Fixed string node type skipping in tree copy.
Fixed genealogical dotted list on non reference symbols.

v1.7   2009-02-20

Added internal functions "execute" and "prompt".
Parameter file is now created if does not exist.

v1.6.1   2008-11-02

Fixed string variable reading issue.
Improved memory management in relational and logical operations.

v1.6   2008-06-23

Improved memory management.
Added parameter file pcastli.ini.
Added internal function "clear".

v1.5   2008-04-12

Extended the "Type error." messages for operators.
Statements in a statement list can now be separated by a ';'.
Improved "Symbol not found." messages with symbol name.

v1.4   2008-03-16

Added the unary operator '*'.
Added internal function "copytree".

v1.3.1   2008-03-15

Identifiers can now include the character '_'.

v1.3   2008-03-15

Added internal function "return".

v1.2   2008-03-05

Added ++ and -- operators.
Fixed the "for" incrementation issue.

v1.1   2008-02-24

Added i/o internal functions "scan", "read" and "write".
Added internal functions "getwd", "setwd", "tonode", "sublist", "catlist", 
  "ntoa" and "aton".
Fixed the '\\' issue and the "" issue in string reading.

v1.0   2008-02-16