GTL supports standard arithmetic and logical operators along with some advanced template operators.
The following standard arithmetical and logical operators are supported, where x and y can be numbers or templates resolving to numbers:
|
Operator |
Description |
|---|---|
| = | Assignment operator. |
| == and != | Equal to and not equal to operators. |
| > and < | Greater than and less than operators. |
| >= and <= | Greater than or equal to and less than or equal to operators. |
| && and || | Logical AND and logical OR operators. |
|
%+(x,y)% |
Addition operator. |
%-(x,y)% |
Subtraction operator. |
%*(x,y)% |
Multiplication operator. |
%/(x,y)% |
Division operator. |
%&(x,y)% |
Logical bitfield and operator |
In this example, the template in the left column produces the output on the right:
| Template | Results |
|---|---|
Base number= %Number% Number+1= %+(Number,1)% Number-1= %-(Number,1)% Number*2= %*(Number,2)% Number/2= %/(Number,2)% Number&1= %&(Number,1)% |
Base number= 4 Number+1= 5 Number-1= 3 Number*2= 8 Number/2= 2 Number&1= 0 |
The following advanced template operators are also supported:
|
Operator |
Description |
|---|---|
|
* |
Dereferencing operator - Corresponds to a double
evaluation, returning a template instead of text, using the
syntax:
%*template [(P1,P2...)]%For information about template parameters, see Passing Parameters to a Template. In the following example, a local variable is
returned normally and in a dereferenced
form:
.set_value(C, Code) %C% %*C%Result: Code %Code% |
|
! |
Power evaluation operator - Evaluates the results of the evaluation of the variable as a template. In the following example, a local variable is returned normally
and in a power-evaluated
form:
.set_value(C, %%MyAttribute%%) %C% %!C%Result: %MyAttribute% Red The ! operator may be applied any number of times. For example: %!!t% This outputs the results of the evaluation of the evaluation of the evaluation of template t. |
|
? |
Existence operator - Tests whether a template, local variable, or property is present, and returns false if it is not. For example: .set_value (myVariable, 20, new) %myVariable?% .unset (myVariable) %myVariable?% Result: true false |
|
+ |
Visibility operator - Tests whether an object property is visible in the interface, and returns false if it is not. For example, to test if the
Type field is displayed in the
General tab of a database property
sheet in a DMM (meaning that a Replication Server extension file
is attached to the model), enter the
following:
%Database.Type+% |