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hydra.lib.strings.ToLower Maven / Gradle / Ivy
package hydra.lib.strings;
import hydra.Flows;
import hydra.compute.Flow;
import hydra.core.Name;
import hydra.core.Term;
import hydra.core.TypeScheme;
import hydra.dsl.Expect;
import hydra.dsl.Terms;
import hydra.graph.Graph;
import hydra.tools.PrimitiveFunction;
import java.util.List;
import java.util.function.Function;
import static hydra.dsl.Types.function;
import static hydra.dsl.Types.scheme;
import static hydra.dsl.Types.string;
public class ToLower extends PrimitiveFunction {
public Name name() {
return new Name("hydra/lib/strings.toLower");
}
@Override
public TypeScheme type() {
return scheme(function(string(), string()));
}
@Override
protected Function, Flow> implementation() {
return args -> Flows.map(Expect.string(args.get(0)), s -> Terms.string(apply(s)));
}
public static String apply(String upper) {
// TODO: Java's built-in behavior may not agree with that of Haskell or other host languages
return upper.toLowerCase();
}
}
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