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package eval
import "strings"
// SplitSigil splits any leading sigil from a qualified variable name.
func SplitSigil(ref string) (sigil string, qname string) {
if ref == "" {
return "", ""
}
// TODO: Support % (and other sigils?) if https://b.elv.sh/584 is implemented for map explosion.
switch ref[0] {
case '@':
return ref[:1], ref[1:]
default:
return "", ref
}
}
// SplitQName splits a qualified name into the first namespace segment and the
// rest.
func SplitQName(qname string) (first, rest string) {
colon := strings.IndexByte(qname, ':')
if colon == -1 {
return qname, ""
}
return qname[:colon+1], qname[colon+1:]
}
// SplitQNameSegs splits a qualified name into namespace segments.
func SplitQNameSegs(qname string) []string {
segs := strings.SplitAfter(qname, ":")
if len(segs) > 0 && segs[len(segs)-1] == "" {
segs = segs[:len(segs)-1]
}
return segs
}
// SplitIncompleteQNameNs splits an incomplete qualified variable name into the
// namespace part and the name part.
func SplitIncompleteQNameNs(qname string) (ns, name string) {
colon := strings.LastIndexByte(qname, ':')
// If colon is -1, colon+1 will be 0, rendering an empty ns.
return qname[:colon+1], qname[colon+1:]
}
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