MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Manual de servicio descargar pdf (Pagina 65)

Compiler Directives

2-45

A function optionally returns a value with the %return directive. The returned

value can be any of the types defined in the Target Language Values table.

In this example, a function,

name, returns x, if x and y are equal, and returns

z, if x and y are not equal.

%function name(x,y,z) void

%if x == y

%return x

%else

%return z

%endif

%endfunction

Function calls can appear in any context where variables are allowed.

All

%with statements that are in effect when a function is called are available

to the function. Calls to other functions do not include the local scope of the

function, but do include any

%with statements appearing within the function.

Assignments to variables within a function always create new, local variables

and can not change the value of global variables unless you use the

:: scope

resolution operator.

By default, a function returns a value and does not produce any output. You

can override this behavior by specifying the

Output and void modifiers on the

function declaration line, as in:

%function foo() Output

…

%endfunction

In this case, the function continues to produce output to the currently open file,

if any, and is not required to return a value. You can use the

void modifier to

indicate that the function does not return a value, and should not produce any

output, as in:

%function foo() void

…

%endfunction

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MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Manual de servicio Pagina 65