Language Elements
55
NetLinx Programming Language Reference Guide
Structures
A
structure
provides the ability to create a new data type composed of other data types arranged in a
specified order.
Here's an example:
DEFINE_TYPE
STRUCTURE NEWSTRUCT
{
INTEGER Number
CHAR Text[20]
}
In the example above, a structure named
NEWSTRUCT
is declared to contain two data types, a 16-bit
number and a 20-character array. Once declared, a structure may be used in the same way as any other
data type. Here is a syntax sample:
DEFINE_VARIABLE
NEWSTRUCT MyNewStruct
NEWSTRUCT MyNewStructArray[3]
Structures can be initialized using set notation as in the two examples below. Notice that the members of
each structure, as well as, the entire array are enclosed in braces.
MyNewStruct.Number = 0
MyNewStruct.Text= 'Copyright by Company X'
MyNewStructArray[1].Number = 1
MyNewStructArray[1].Text = 'Line 1'
MyNewStructArray[2].Number = 2
MyNewStructArray[2].Text = 'Line 2'
MyNewStructArray[3].Number = 3
MyNewStructArray[3].Text = 'Line 3'
Structure members are referenced using dot-operator syntax as shown below:
MyNewStruct.Number = 0
MyNewStructArray[1].Number = 20
SET_LENGTH_STRING (MyNewStruct.Text, 16)
A syntax sample for a structure definition is shown below:
STRUCTURE <name>
{
[<type>] <Data1>
[<type>] <Data2>
[<type>] <DataN>
}
The attributes
VOLATILE
,
PERSISTENT
, and
CONSTANT
do not apply to the individual members of a
structure.
A structure is declared in the DEFINE_TYPE section of the program.
Summary of Contents for NETLINX PROGRAMMING LANGUAGE
Page 15: ...Table of Contents xiii NetLinx Programming Language Reference Guide...
Page 16: ...xiv NetLinx Programming Language Reference Guide Table of Contents...
Page 18: ...Introduction 2 NetLinx Programming Language Reference Guide...
Page 76: ...Language Elements 60 NetLinx Programming Language Reference Guide...
Page 106: ...Combining Devices Levels and Channels 90 NetLinx Programming Language Reference Guide...
Page 112: ...Master To Master M2M 96 NetLinx Programming Language Reference Guide...
Page 182: ...Reserved Identifiers 166 NetLinx Programming Language Reference Guide...
Page 204: ...NetLinx UniCode Functions 188 NetLinx Programming Language Reference Guide...
Page 244: ...Appendix B Glossary 228 NetLinx Programming Language Reference Guide...
Page 245: ...Appendix B Glossary 229 NetLinx Programming Language Reference Guide...