Re: RFE String interpolation for RPG -- RPG400-L

Kevin, I tried your code - worked nicely, other than that I had to add ctl-opt dftactgrp(*no).

Scott had an example in these lists that I cited in another post - that one did fine with numbers - I think it did not have *String in the options. But I think it'd be easy enough to use %char() to make everything alpha - haven't tried, just assuming here.

Seems to me that developers from other worlds might be familiar with the syntax of [s]printf, so if this RFE goes through, I'd suggest it use that syntax - it's based not on variable names but on relative position of the replacement tags in the string, followed by the values to replace with. I might suggest that in the RFE.

So we shall see!

Vern

On 10/20/2021 3:02 PM, Kevin Bucknum wrote:

I had old tests where I was playing with sprintf. Looking through production I don't see where we used it. Might have been a conversion that has been archived. I have a note in the old source that numbers are too hard to do. Old was fixed from 15 years ago, this is it q&d converted to free.

https://code.midrange.com/a24a1a7289.html

1. **Free
2.
3. // Testing Sprintf
4.
5. Dcl-Pr Sprintf int(10) Extproc(*Cwiden:'sprintf');
6. ReturnValue Pointer Value Options(*String);
7. FormatString Pointer Value Options(*String);
8. Sub1 Pointer Value Options(*String:*Nopass);
9. Sub2 Pointer Value Options(*String:*Nopass);
10. Sub3 Pointer Value Options(*String:*Nopass);
11. Sub4 Pointer Value Options(*String:*Nopass);
12. End-Pr;
13.
14. Dcl-S Result Char(50);
15. Dcl-S Sample Char(50);
16. Dcl-S MyString Char(20);
17. Dcl-S Mystring2 Char(10);
18. Dcl-S Mystring3 Char(60);
19. Dcl-S Rc Int(10);
20.
21. Sample = '#1 is %s';
22. Mystring = '12';
23. Rc = Sprintf(%addr(Result):Sample:Mystring);
24. If Rc > 0;
25. Dsply Result;
26. Else;
27. Dsply 'Failed';
28. EndIf;
29.
30.
31. Sample = '#1 is %s and #2 is %s';
32. Mystring2 = ' 1 3 ';
33. Rc = Sprintf(%addr(Result)
34. :Sample
35. :%Trim(Mystring)
36. :%Trim(Mystring2));
37. If Rc > 0;
38. Dsply Result;
39. Else;
40. Dsply 'Failed';
41. EndIf;
42. Sample = '#1 is %s and #2 is %s and #3 is %s';
43. Mystring3 = 'Abcde';
44. Rc = Sprintf(%addr(Result)
45. :Sample
46. :%Trim(Mystring)
47. :%Trim(Mystring2)
48. :%Trim(Mystring3));
49. If Rc > 0;
50. Dsply Result;
51. Else;
52. Dsply 'Failed';
53. EndIf;
54.
55. *Inlr = *On;
56. Return;

On Wed, 2021-10-20 at 14:38 -0400, Jon Paris wrote:
printf works fine Vern. You have to decide how many parms you want to accommodate as RPG has no notion of a repeating parameter ...

sprintf too.

Jon Paris

On Oct 20, 2021, at 12:34 PM, Vern Hamberg <vhamberg@xxxxxxxxxxxxxxx<mailto:vhamberg@xxxxxxxxxxxxxxx>> wrote:

I don't remember whether the 3rd parameter of %scanrpl has to be a variable, or can it be an expression. If the latter, one can always nest the BIFs = not pretty but all in one, right?

But an interesting RFE, let's see how many votes and what the comments are. This looks kind of like C's printf function, conceptually, anyhow. Hey, you CAN maybe call that! Should see if I can put that in my presentation!

Vern

On 10/20/2021 11:00 AM, Peter Dow wrote:
Not exactly. This does it all in one statement; with %scanrpl you would have to do it once for each variable you want to replace, then print the resulting string.

myString = 'I have {apples} apples and {bananas} bananas';
myString = %scanrpl('{apples}' : %char(apples) : myString);
myString = %scanrpl('{bananas}' : %char(bananas) : myString);
print myString;

On 10/20/2021 8:53 AM, Alan Campin wrote:
Isn't that exactly what %ScanRpl does?

On Wed, Oct 20, 2021 at 8:27 AM Justin Taylor<jtaylor.0ab@xxxxxxxxx<mailto:jtaylor.0ab@xxxxxxxxx>> wrote:

Description:

Add string interpolation support so variables can be inserted into string
literals without having to use concatenation with + symbols and multiple
literals.

For example:

apples = 4

bananas = 3

print(f"I have {apples} apples and {bananas} bananas")

http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=152890
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