TAG_NAMES Function

Returns a string array containing the names of the tags in a structure expression.

result = TAG_NAMES(expr)

expr The expression for which the tag names will be returned. Must be of structure type.

result The string array containing the names of the tags. If expr is a structure containing nested structures, only the names of tags in the outermost structure are returned (as TAG_NAMES does not search for tags recursively).

None.

This example uses TAG_NAMES to display the tag names of a structure and one of its fields, which is also a structure.

a = {struc1, t1: 0.0D, t2: {struct2, $
    t2_t1: INTARR(3), t2_t2: 0.0, t2_t3: 0L},$
    t3: FLTARR(12), t4: 0L}

; Create a structure containing four fields, the second of which is also a structure.

PRINT, TAG_NAMES(a)

T1 T2 T3 T4

; Display tag names of a.

PRINT, TAG_NAMES(a.t2)

T2_T1 T2_T2 T2_T3

; Display tag names of the structure in the second field of a.

DELSTRUCT, N_TAGS, STRUCTREF