AliasDec.ceylon
"An alias reference expression, that is,
the [[name]] of an alias, optionally qualified by a [[qualifier]] (separated from it by a member operator ‘`.`’),
prefixed by the type keyword `alias` and surrounded by backticks.
Examples:
`alias TypeName`
`alias A.B.C"
shared class AliasDec(name, qualifier = null)
extends TypeDec() {
shared actual UIdentifier name;
shared actual DecQualifier? qualifier;
keyword = "alias";
shared actual <DecQualifier|Identifier>[] children = concatenate(emptyOrSingleton(qualifier), [name]);
shared actual Result transform<out Result>(Transformer<Result> transformer)
=> transformer.transformAliasDec(this);
shared actual Boolean equals(Object that) {
if (is AliasDec that) {
if (exists qualifier) {
if (exists qualifier_ = that.qualifier) {
return qualifier == qualifier_ && name == that.name;
} else {
return false;
}
} else {
if (!(that.qualifier exists)) {
return name == that.name;
} else {
return false;
}
}
} else {
return false;
}
}
shared actual Integer hash
=> 31 * (name.hash + 31 * (qualifier?.hash else 0));
shared AliasDec copy(UIdentifier name = this.name, DecQualifier? qualifier = this.qualifier) {
value ret = AliasDec(name, qualifier);
copyExtraInfoTo(ret);
return ret;
}
}