bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/singletons/ListLength.java

   1 package org.simantics.scl.compiler.constants.singletons;\r
   2 \r
   3 import org.cojen.classfile.TypeDesc;\r
   4 import org.simantics.scl.compiler.constants.FunctionValue;\r
   5 import org.simantics.scl.compiler.internal.codegen.references.Val;\r
   6 import org.simantics.scl.compiler.internal.codegen.utils.Constants;\r
   7 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;\r
   8 import org.simantics.scl.compiler.types.TVar;\r
   9 import org.simantics.scl.compiler.types.Type;\r
  10 import org.simantics.scl.compiler.types.Types;\r
  11 import org.simantics.scl.compiler.types.kinds.Kinds;\r
  12 \r
  13 public class ListLength extends FunctionValue {    \r
  14     private static TVar A = Types.var(Kinds.STAR);\r
  15     public static final ListLength INSTANCE = new ListLength();\r
  16     \r
  17     private ListLength() {\r
  18         super(new TVar[] {A}, Types.NO_EFFECTS, Types.INTEGER, Types.list(A));\r
  19     }\r
  20     \r
  21     @Override\r
  22     public Type applyExact(MethodBuilder mb, Val[] parameters) {\r
  23         parameters[0].push(mb);\r
  24         mb.invokeInterface("java/util/List", "size", TypeDesc.INT, Constants.EMPTY_TYPEDESC_ARRAY);\r
  25         return getReturnType();\r
  26     }\r
  27 \r
  28     @Override\r
  29     public String toString() {\r
  30         return "length";\r
  31     }\r
  32 }\r