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Description:
This function
clears the values of a specified set of attributes for an
Object. Clearing an
attribute cancels any value that has previously been explicitly set for it, so that
the standard default attribute value will subsequently be used instead. This
also causes the
astTest function to return the value zero for the attribute,
indicating that no value has been set.
Synopsis
void astClear( AstObject
∗this, const
char ∗attrib
)
Parameters:
this
Pointer to the Object.
attrib
Pointer to a null-terminated
character string containing a comma-separated list of the names of the attributes to be
cleared.
Applicability
Object
This function applies to all Objects.
Notes:
-
Attribute names are not case sensitive and may be surrounded by white space.
-
It does no harm to clear an attribute whose value has not been set.
-
An error will result if an attempt is made to clear the value of a read-only attribute.
Copyright (C) 2021 East Asian Observatory
- ←Prev
- AST
A Library for Handling
World
Coordinate Systems
in Astronomy - Next→
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