ALPHA-VISION® Compare Operations: IsRefEqual

IsRefEqual

SUMMARY

IsRefEqual - compares two variables resp. reference variables

SYNTAX

IsRefEqual(<node1, node2>);

ARGUMENTS

node1, node2 (type:any)

IsRefEqual compares two variables resp. reference variables

DESCRIPTION

1. Missing arguments are taken from the stack.(and removed from there).
2. The result is pushed onto the stack.

On a compare operation IsEqual with a Reference-Variable defined as an argument, the value of the referenced variable is compared, not the reference itself.
IsRefEqual compares two Reference-Variables, resp. one Reference-Variable with a (possibly) referenced Variable.

EXAMPLES

//Stack before: empty
SetRefOf(refvar, var);
IsRefEqual(refvar,var);
//Stack afterwards: (1 Element):
//true

//Stack before: empty
SetRefOf(refvar1, var1);
SetRefOf(refvar2, var2);
IsRefEqual(refvar1, refvar2);
//Stack afterwards: (1 Element):
//false

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Syntax Notation

[aaa]

aaa is optional (zero or one occurences)

(aaa|bbb)

aaa exclusive or bbb

(aaa)*

aaa may occur indefinitely often or may be omitted

(aaa)+

aaa may occur indefinitely often but at least once

(aaa)m..n

aaa may occur from m to n times