Variable assignment and use within an expression (SDL script)
SDL Script Extensions for TDK:
%localstring DestVar
%localstring SourceVar = "a string"
DestVar = SourceVar & " another string"
%extern AnotherVar $ Reference to a global defined elsewhere (e.g. another module)
$ Prevents Tdk from triggering a warning (no –w) or an error (-w)
In TDK it is easier to define, set and get variable values. As explained in the following example, %setlocalvar and %getlocalvar are no more needed. For assigning variable B to a variable A, just do as follows:
A = B
Similarly for expressions on the right side:
A = B + 1
NOTE: %setvar, %setlocalvar, %getvar and %getlocalvar can still be used.
Declaring variables can be with or without surrounding quotes:
%localstring MyVar $ Without quotes
%localstring "Another" $ With quotes
Expressions can be used for assigning a variable directly on declaration:
%string A = "a string"
Global variables declared in module X can be referenced from within module Y by specifying them as %extern:
Module X:
%string VarOne
Module Y:
%extern VarOne
VarOne = "my value"
Declaring extern variables as %extern is optional when the TDK translator is invoked without the -w option (= warnings as errors). In this case TDK prints a warning. When the –w option is specified, declaring extern variables as %extern is mandatory, otherwise TDK generates an error and the build process is stopped.