Method

GLibVariantTypefirst

Declaration 

const GVariantType*
g_variant_type_first (
  const GVariantType* type
)

Description

Determines the first item type of a tuple or dictionary entry type.

This function may only be used with tuple or dictionary entry types, but must not be used with the generic tuple type G_VARIANT_TYPE_TUPLE.

In the case of a dictionary entry type, this returns the type of the key.

NULL is returned in case of type being G_VARIANT_TYPE_UNIT.

This call, together with g_variant_type_next() provides an iterator interface over tuple and dictionary entry types.

Return value

Type: GVariantType

The first item type of type, or NULL

Since 2.24

The data is owned by the instance.