Initializing help system before first use

gettypeid

Purpose
Get the type ID of an entity.
Synopsis
function gettypeid(e: ?):integer
Argument
e 
An entity (must be a scalar)
Return value
A type ID, 0 if the information is not available or -1 if the entity is a union that is not defined.
Example 
declarations
 MYSET=set of integer
 s: MYSET
 u1,u2,u3,u4: any
end-declarations
  ...
u1:=s
u2:={1,2,3}
u4:=13.3
writeln("ElType of u1: ", u1.typeid,            ! = MYSET.id
        "\nElType of u4: ", u4.typeid,          ! = real.id=2
        "\nElType of u2: ", u2.typeid,          ! = 0
        "\nElType of u3: ", u3.typeid)          ! = -1
Further information
1. This function retrieves the type ID of a variable. If this variable is a union, it returns the type ID of the value stored in this 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 that is 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 via getstruct and geteltype.
Related topics
getstruct, geteltype.

Parent Topic Predefined functions and procedures

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