60 lines
1.3 KiB
Java
60 lines
1.3 KiB
Java
package carpet.script;
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import carpet.script.value.Value;
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/** LazyNumber interface created for lazily evaluated functions */
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@FunctionalInterface
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public interface LazyValue
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{
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LazyValue FALSE = (c, t) -> Value.FALSE;
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LazyValue TRUE = (c, t) -> Value.TRUE;
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LazyValue NULL = (c, t) -> Value.NULL;
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LazyValue ZERO = (c, t) -> Value.ZERO;
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public static LazyValue ofConstant(Value val) {
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return new Constant(val);
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}
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Value evalValue(Context c, Context.Type type);
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default Value evalValue(Context c){
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return evalValue(c, Context.Type.NONE);
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}
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@FunctionalInterface
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interface ContextFreeLazyValue extends LazyValue
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{
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Value evalType(Context.Type type);
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@Override
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default Value evalValue(Context c, Context.Type type) {
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return evalType(type);
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}
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}
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class Constant implements ContextFreeLazyValue
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{
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Value result;
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public Constant(Value value)
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{
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result = value;
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}
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public Value get() {return result;}
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@Override
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public Value evalType(Context.Type type) {
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return result.fromConstant();
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}
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@Override
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public Value evalValue(Context c, Context.Type type) {
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return result.fromConstant();
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}
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}
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}
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