Release calc version 2.12.0.4

This commit is contained in:
Landon Curt Noll
2006-06-20 03:31:22 -07:00
parent bd3086138b
commit afe37ec851
25 changed files with 437 additions and 202 deletions

76
CHANGES
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@@ -260,6 +260,78 @@ The following are the changes from calc version 2.12.0 to date:
Updated the "help variable" text to reflect the current calc
use of ` (backquote), * (star), and & (ampersand).
Removal of some restrictions on the use of the same identifier
for more than one of parameter, local, static or global variable.
For example, at command level, one could use:
for (local x = 0; x < 10; x++) print sqrt(x);
At the beginning of a statement, "(global A)" is a way of
indicating a reference to the variable A, whereas "global A"
would be taken as a declaration. Parentheses are not required in
"++global A" or "global A++" when "global" is used in this way.
The patch extends this "specifier" (or "qualifier") feature
to static variables, but such that "static A" refers only
to a static variable at the current file and function scope
levels. (If there is already a static variable A at the current
file and function levels, a declaration statement "static A"
would end the scope of that variable and define a new static
variable with identifier A. A "global A" declaration is more
drastic in that it ends the scope of any static variable A at
the same or higher scope levels.)
Unlike a static declaration in which an "initialization" occurs at
most once, in the specifier case, "static A = expr" is simply an
assignment which may be repeated any number of times. An example
of its use is:
define np() = static a = nextprime(a);
For n not too large, the n-th call to this function will
return the n-th prime. The variable a here will be private to
the function.
Because one can use "global", "local" or "static" to specify a
type of variable, there seems little point in restricting the
ways identifiers that can be used in more than one of these
or as parameters. Obviously, introducing A as a local variable
when it is being used as a parameter can lead to confusion and a
warning is appropriate, but if it is to be used only occasionally,
it might be convenient to be able to refer to it as "local A"
rather than introducing another identifier. While it may be
silly to use the same identifier for both a parameter and local
variable, it should not be illegal.
The provision of warnings for possibly questionable programming in
function definitions.
Added config("redecl_warn", boolean) to control if calc issues
warnings about variables being declared. The config("redecl_warn")
value is TRUE by default.
Added config("dupvar_warn", boolean) to control if calc issues
warnings about when variable names collide. Examples of variable name
collisions include when:
* both local and static variables have the same name
* both local and global variables have the same name
* both function parameter and local variables have the same name
* both function parameter and global variables have the same name
The config("dupvar_warn") value is TRUE by default.
Fix of a bug which causes some static variables not to be correctly
unscoped when their identifiers are used in a global declaration.
Change of "undefine" from a command-level keyword to statement level and
introduction of an "undefine static A" statement to end the scope of a
static variable A at the current file/function levels.
Change/restored the syntax rules for "for" and "while" loops to
recognize an unescaped newline in top-level command-level statements.
The following are the changes from calc version 2.11.10.1 to 2.11.11:
@@ -6077,8 +6149,8 @@ Following is a list of visible changes to calc from version 1.24.7 to 1.26.1:
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
##
## @(#) $Revision: 29.80 $
## @(#) $Id: CHANGES,v 29.80 2006/06/11 07:52:58 chongo Exp $
## @(#) $Revision: 29.82 $
## @(#) $Id: CHANGES,v 29.82 2006/06/20 10:26:41 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/RCS/CHANGES,v $
##
## Under source code control: 1993/06/02 18:12:57