Accessing structure member in Note operation

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The compiler doesn't like 

Note/NOCR w, sHeader.sHeader

Where sHeader.sHeader references a string structure member.  The compiler reports "expected a keyword or an object name" pointing to the "." in the structure reference.  A very quick look through the manual turned up nothing on this syntax.  I can work around this by first assigning the member to a string and using the string in the operation.  Am I missing something in using a structure reference in the Note operation or is this a limitation of structures?

I feel as though I've encountered this before, but can't recall the details.

Thanks,

Jeff

In order to investigate I had to create a minimal self-contained example:

Structure MyStruct
    String sHeader
EndStructure

Function Test()
    Make/O wave0 = p
    STRUCT MyStruct s
    Note/NOCR wave0, s.sHeader
End

Having done that, I can verify the compile error that you report.

The solution is to use ""+s.sHeader. The leading empty string helps Igor's compiler understand that the parameter is a string.

The fact that the compiler needs this help seems like a flaw but there is probably a technical reason for it.

 

June 17, 2020 at 04:51 pm - Permalink