Flexible search and listing tool for field names in a structure array

Searches for field names in a structure array and lists them

Call options:
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SearchFields(AStruct)
- Displays all fields in structure array AStruct with their complete ("long") names.

SearchFields(AStruct, SearchString)
- Displays all fields in structure array AStruct of which the name contains SearchString (default = case-insensitive).

SearchFields(AStruct, SearchString, SearchOption)
- The following options may be indicated by SearchOption:
'default' - Default (case-insensitive search, see above).
'case' - Case-sensitive search.
'exact' - Only those field names are listed which matches the SearchString exactly (case-insensitive search).
'exactcase' - The same as 'exact', but with case-sensitive search.
'begin' - Only those field names are listed of which the beginning matches the SearchString (case-insensitive search).
'begincase' - The same as 'begin', but with case-sensitive search.
'end' - Only those field names are listed of which the end matches the SearchString (case-insensitive search).
'endcase' - The same as 'end', but with case-sensitive search.
If no option is given, 'default' is assumed.

SearchFields(AStruct, SearchString, SearchOption, AStructName)
- Normally, the name of the structure array AStruct is resolved using the internal MatLab function "inputname". However, this does not work when the name of AStruct contains dots and/or brackets. As a workaround (as well as to enable recursive operation) the name of AStruct can be entered "manually" as a string in AStructName.

FoundFieldsList = SearchFields(AStruct, ...)
- A list of the found field names is stored as a cellular string array into the output variable FoundFieldsList.

If no output variable is indicated, the names are printed as a list on the screen.

Example of function call:
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SearchFields(ExampleStruct, 'afield')

Result (example):
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ExampleStruct.AField
ExampleStruct.AnotherField{2,3}.AField
ExampleStruct.AnotherField{2,3}.AField2