diff options
Diffstat (limited to 'tcl8.6/doc/object.n')
-rw-r--r-- | tcl8.6/doc/object.n | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/tcl8.6/doc/object.n b/tcl8.6/doc/object.n deleted file mode 100644 index df657a9..0000000 --- a/tcl8.6/doc/object.n +++ /dev/null @@ -1,128 +0,0 @@ -'\" -'\" Copyright (c) 2007-2008 Donal K. Fellows -'\" -'\" See the file "license.terms" for information on usage and redistribution -'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. -'\" -.TH object n 0.1 TclOO "TclOO Commands" -.so man.macros -.BS -'\" Note: do not modify the .SH NAME line immediately below! -.SH NAME -oo::object \- root class of the class hierarchy -.SH SYNOPSIS -.nf -package require TclOO - -\fBoo::object\fI method \fR?\fIarg ...\fR? -.fi -.SH "CLASS HIERARCHY" -.nf -\fBoo::object\fR -.fi -.BE -.SH DESCRIPTION -.PP -The \fBoo::object\fR class is the root class of the object hierarchy; every -object is an instance of this class. Since classes are themselves objects, -they are instances of this class too. Objects are always referred to by their -name, and may be \fBrename\fRd while maintaining their identity. -.PP -Instances of objects may be made with either the \fBcreate\fR or \fBnew\fR -methods of the \fBoo::object\fR object itself, or by invoking those methods on -any of the subclass objects; see \fBoo::class\fR for more details. The -configuration of individual objects (i.e., instance-specific methods, mixed-in -classes, etc.) may be controlled with the \fBoo::objdefine\fR command. -.PP -Each object has a unique namespace associated with it, the instance namespace. -This namespace holds all the instance variables of the object, and will be the -current namespace whenever a method of the object is invoked (including a -method of the class of the object). When the object is destroyed, its instance -namespace is deleted. The instance namespace contains the object's \fBmy\fR -command, which may be used to invoke non-exported methods of the object or to -create a reference to the object for the purpose of invocation which persists -across renamings of the object. -.SS CONSTRUCTOR -The \fBoo::object\fR class does not define an explicit constructor. -.SS DESTRUCTOR -The \fBoo::object\fR class does not define an explicit destructor. -.SS "EXPORTED METHODS" -The \fBoo::object\fR class supports the following exported methods: -.TP -\fIobj \fBdestroy\fR -. -This method destroys the object, \fIobj\fR, that it is invoked upon, invoking -any destructors on the object's class in the process. It is equivalent to -using \fBrename\fR to delete the object command. The result of this method is -always the empty string. -.SS "NON-EXPORTED METHODS" -.PP -The \fBoo::object\fR class supports the following non-exported methods: -.TP -\fIobj \fBeval\fR ?\fIarg ...\fR? -. -This method concatenates the arguments, \fIarg\fR, as if with \fBconcat\fR, -and then evaluates the resulting script in the namespace that is uniquely -associated with \fIobj\fR, returning the result of the evaluation. -.TP -\fIobj \fBunknown ?\fImethodName\fR? ?\fIarg ...\fR? -. -This method is called when an attempt to invoke the method \fImethodName\fR on -object \fIobj\fR fails. The arguments that the user supplied to the method are -given as \fIarg\fR arguments. -.VS -If \fImethodName\fR is absent, the object was invoked with no method name at -all (or any other arguments). -.VE -The default implementation (i.e., the one defined by the \fBoo::object\fR -class) generates a suitable error, detailing what methods the object supports -given whether the object was invoked by its public name or through the -\fBmy\fR command. -.TP -\fIobj \fBvariable \fR?\fIvarName ...\fR? -. -This method arranges for each variable called \fIvarName\fR to be linked from -the object \fIobj\fR's unique namespace into the caller's context. Thus, if it -is invoked from inside a procedure then the namespace variable in the object -is linked to the local variable in the procedure. Each \fIvarName\fR argument -must not have any namespace separators in it. The result is the empty string. -.TP -\fIobj \fBvarname \fIvarName\fR -. -This method returns the globally qualified name of the variable \fIvarName\fR -in the unique namespace for the object \fIobj\fR. -.TP -\fIobj \fB<cloned> \fIsourceObjectName\fR -.VS -This method is used by the \fBoo::object\fR command to copy the state of one -object to another. It is responsible for copying the procedures and variables -of the namespace of the source object (\fIsourceObjectName\fR) to the current -object. It does not copy any other types of commands or any traces on the -variables; that can be added if desired by overriding this method in a -subclass. -.VE -.SH EXAMPLES -.PP -This example demonstrates basic use of an object. -.PP -.CS -set obj [\fBoo::object\fR new] -$obj foo \fI\(-> error "unknown method foo"\fR -oo::objdefine $obj method foo {} { - my \fBvariable\fR count - puts "bar[incr count]" -} -$obj foo \fI\(-> prints "bar1"\fR -$obj foo \fI\(-> prints "bar2"\fR -$obj variable count \fI\(-> error "unknown method variable"\fR -$obj \fBdestroy\fR -$obj foo \fI\(-> error "unknown command obj"\fR -.CE -.SH "SEE ALSO" -my(n), oo::class(n) -.SH KEYWORDS -base class, class, object, root class -.\" Local variables: -.\" mode: nroff -.\" fill-column: 78 -.\" End: |