issue to have "if" inside function

[justsoso8]

Dear sir,

I'm now using your latest TCMD 13.00.27 x64 for evaluation.

The following command runs well, function is defined, and the function is executed
>>function test=`echo done` %+ function test %+ %@test[]
echo done
done

also following conditional command executed well
>>if 1==1 echo done
done

but if i combine them into one function:
>> function test=`if 1==1 echo done` %+ function test %+ %@test[]
if 1==1 echo done

It seems the function is defined as expected, but doesn't have expected result.

Any help from you?

 

[Charles Dye]

I'm not sure what you're trying to accomplish with that. The FUNCTION command is used to define, well... functions. Functions return values; they are generally used as arguments to commands. It's pretty rare to have a function return a command as a value.

If you want to create a new command, use ALIAS. If, on the other hand, you want the function to return different values depending on a condition, that's what @IF[] is for.

What are you trying to do?

 

[justsoso8]

I'm not sure what you're trying to accomplish with that. The FUNCTION command is used to define, well... functions. Functions return values; they are generally used as arguments to commands. It's pretty rare to have a function return a command as a value.

If you want to create a new command, use ALIAS. If, on the other hand, you want the function to return different values depending on a condition, that's what @IF[] is for.

What are you trying to do?

What I want do is to deine a function do sth depends on the condition, and finally return a result.
My issue is: if there's an "if" inside function defination, the function can not execuate any futher. here, "echo" is just an example, since it's easy to get the feedback.

I'm not sure if i expressed my idea clearly.

 

[vefatica]

On Tue, 25 Oct 2011 22:56:45 -0400, justsoso8 <> wrote:

|What I want do is to deine a function do sth and finally return a result.
|My issue is: if there's an "if" inside function defination, the function can not execuate any futher.

It is very difficult and often impossible to execute commands in a function.
Functions should, in general, test/evaluate things and create a string (not echo
it); the function will be replaced by this string when you use it. The best way
to make decisions in a function if with @IF[]. Here's an example.

v:\> function parity `%@if[%@eval[%1 MOD 2] == 1,odd,even]`

v:\> echo %@parity[3]
odd

v:\> echo %@parity[4]
even

Here's one a little like your original example

v:\> function test `%@if[%1 == 1,done,not done]`

v:\> echo %@test[1]
done

v:\> echo %@test[2]
not done