Tag Archives: __mvRelease()

Variable Management Functions

Posted on by vivaclipper

Variable Management

FieldBlock Return a code block that sets/gets a value for a given field
FieldWBlock Return a sets/gets code block for field in a given work area
HB_AParams Returns an array containing values of all parameters passed to a function, method or procedure
HB_ArgC Returns the number of command line arguments
HB_ArgCheck Checks existence of an internal switch on the command line
HB_ArgShift Updates HB_Arg* parameter list removing the 1-st one and replacing it by others
HB_ArgString Retrieves the vale of an internal switch set on the command line.
HB_ArgV Retrieves the value of a command line argument
HB_PIsByRef Determine if a parameter is passed by reference.
HB_PValue Retrieves the value of an argument.
HB_ValToStr Converts any scalar type to a string.
MemVarBlock Returns a codeblock that sets/gets a value of memvar variable
PCount Retrieves the number of arguments passed to a function.
Type Retrieves the type of an expression
ValType Retrieves the data type of an expression

__mvRelease()

Posted on by vivaclipper

Template

Function

Name

__mvRelease()

Category

API

Subcategory

Variable management

Oneliner

This function releases PRIVATE variables

Syntax

      __mvRelease( <skeleton>, <include_exclude_flag> )

Arguments

<skeleton> = string that contains the wildcard mask for variables’ names that will be released. Supported wildcards: ‘*’ and ‘?’ <include_exclude_flag> = logical value that specifies if variables that match passed skeleton should be either included in deletion (if .T.) or excluded from deletion (if .F.)

Returns

Nothing

Description

This function releases values stored in memory variables. It shouldn’t be called directly, it should be placed into RELEASE ALL command. If the released variable is a PRIVATE variable then previously hidden variable with the same name becomes visible after exit from the procedure where released variable was created. If you access the released variable in the same function/procedure where it was created the the NIL value is returned. You can however assign a new value to released variable without any side effects. PUBLIC variables are not changed by this function.

Examples

      None Avaliable

Compliance

Harbour

Files

Library is core