Initializing help system before first use

# getuntypeid

Purpose
Get the type ID of the value stored in a union.
Synopsis
`int getuntypeid(XPRMunion un);`
Argument

un | Reference to a union entity

Return value
A type ID, 0 if the information is not available or -1 if the union is undefined.
Further information
1. This function retrieves the type ID of the value stored in a union. This information is always defined if the value is a scalar ( i.e. a constant or a reference) but it will be available for a structured type only if the value comes from an entity defined as an instance of a defined user type.
2. When the function returns 0, the properties of the value stored in the union can still be obtained from getuntype.
Related topics
getunvalue, getuntype, getuntypeself.
Parent Topic Union access

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