Scan chain corresponds to all adjacent spaces when a sequence of scanning to match an exact string ends in a space

Recently, I wrote code to parse a string using the string function analysis.  The string contains a descriptive text as well as some of the settings I want to recover the chain.  My approach has been using a format string that match an exact string (descriptive text), that deletes or ignores the exact string and then corresponds to a parameter in the input string.  The remaining string contains more data which are analysed later.

The problem I encountered is that corresponding to an exact string doesn't seem to work as I expect if the exact string ends with a space.  In this case, the exact string is offset, and other white space characters that immediately follow the exact string.  Let me illustrate by examples (------codes are displayed).

Case 1: input string = "Line\s1\s\s\nLine\s2".

string format = "Line\s%d".

remaining string = "\s\s\nLine\s2".

Note that spaces and the supply line after that '1' are moved to the remaining string in this case.

Case 2: input string = "Line\s1\s\s\nLine\s2".

string format = "Line\s%d\s".

remaining string = "Line\s2".

Note that all the spaces and line power immediately after that '1' are deleted and are NOT passed to the remaining string in this case.

Behavior in case 2, it's not what I was expecting.  Can someone comment on that?  I can probably work around this problem, but would like to understand how the channel Scan function is supposed to work.  Is this a bug?

Citing the detailed help:

A space in the format string matches any amount of white space, such as spaces, tabs, line breaks and forms RSS.

Tags: NI Software

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