bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/constraints/ConstraintEnvironment.java

   1 package org.simantics.scl.compiler.internal.elaboration.constraints;
   2
   3 import org.cojen.classfile.TypeDesc;
   4 import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
   5 import org.simantics.scl.compiler.constants.ClassConstant;
   6 import org.simantics.scl.compiler.constants.JavaConstructor;
   7 import org.simantics.scl.compiler.constants.JavaStaticField;
   8 import org.simantics.scl.compiler.constants.JavaStaticMethod;
   9 import org.simantics.scl.compiler.constants.StringConstant;
  10 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  11 import org.simantics.scl.compiler.elaboration.expressions.EConstant;
  12 import org.simantics.scl.compiler.elaboration.expressions.ELiteral;
  13 import org.simantics.scl.compiler.elaboration.java.Builtins;
  14 import org.simantics.scl.compiler.elaboration.modules.TypeClass;
  15 import org.simantics.scl.compiler.elaboration.modules.TypeClassInstance;
  16 import org.simantics.scl.compiler.environment.Environment;
  17 import org.simantics.scl.compiler.errors.Locations;
  18 import org.simantics.scl.compiler.types.TApply;
  19 import org.simantics.scl.compiler.types.TCon;
  20 import org.simantics.scl.compiler.types.TFun;
  21 import org.simantics.scl.compiler.types.TPred;
  22 import org.simantics.scl.compiler.types.TUnion;
  23 import org.simantics.scl.compiler.types.TVar;
  24 import org.simantics.scl.compiler.types.Type;
  25 import org.simantics.scl.compiler.types.Types;
  26
  27 import gnu.trove.map.hash.THashMap;
  28
  29 public class ConstraintEnvironment {
  30     Environment environment;
  31
  32     public ConstraintEnvironment(Environment environment) {
  33         this.environment = environment;
  34     }
  35
  36     public Superconstraint[] getSuperconstraints(TPred constraint) {
  37         TypeClass tc = environment.getTypeClass(constraint.typeClass);
  38         if(tc == null) {
  39             throw new InternalCompilerError("Didn't find constraint " + constraint + ". Maybe Prelude is not loaded?");
  40         }
  41         if(tc.context.length == 0)
  42             return Superconstraint.EMPTY_ARRAY;
  43         Superconstraint[] result = new Superconstraint[tc.context.length];
  44         for(int i=0;i<result.length;++i) {
  45             result[i] = new Superconstraint(
  46                     (TPred)tc.context[i].replace(tc.parameters, constraint.parameters),
  47                     tc.superGenerators[i]
  48                     );
  49         }
  50         return result;
  51     }
  52
  53     private static final Type SERIALIZABLE_BOOLEAN = Types.pred(Types.SERIALIZABLE, Types.BOOLEAN);
  54     private static final Type SERIALIZABLE_BYTE = Types.pred(Types.SERIALIZABLE, Types.BYTE);
  55     private static final Type SERIALIZABLE_SHORT = Types.pred(Types.SERIALIZABLE, Types.SHORT);
  56     private static final Type SERIALIZABLE_INTEGER = Types.pred(Types.SERIALIZABLE, Types.INTEGER);
  57     private static final Type SERIALIZABLE_LONG = Types.pred(Types.SERIALIZABLE, Types.LONG);
  58     private static final Type SERIALIZABLE_FLOAT = Types.pred(Types.SERIALIZABLE, Types.FLOAT);
  59     private static final Type SERIALIZABLE_DOUBLE = Types.pred(Types.SERIALIZABLE, Types.DOUBLE);
  60     private static final Type SERIALIZABLE_STRING = Types.pred(Types.SERIALIZABLE, Types.STRING);
  61
  62     private static final Type SERIALIZABLE_BOOLEAN_ARRAY = Types.pred(Types.SERIALIZABLE, Types.BOOLEAN_ARRAY);
  63     private static final Type SERIALIZABLE_BYTE_ARRAY = Types.pred(Types.SERIALIZABLE, Types.BYTE_ARRAY);
  64     private static final Type SERIALIZABLE_SHORT_ARRAY = Types.pred(Types.SERIALIZABLE, Types.SHORT_ARRAY);
  65     private static final Type SERIALIZABLE_INTEGER_ARRAY = Types.pred(Types.SERIALIZABLE, Types.INTEGER_ARRAY);
  66     private static final Type SERIALIZABLE_LONG_ARRAY = Types.pred(Types.SERIALIZABLE, Types.LONG_ARRAY);
  67     private static final Type SERIALIZABLE_FLOAT_ARRAY = Types.pred(Types.SERIALIZABLE, Types.FLOAT_ARRAY);
  68     private static final Type SERIALIZABLE_DOUBLE_ARRAY = Types.pred(Types.SERIALIZABLE, Types.DOUBLE_ARRAY);
  69
  70     private static final Type SERIALIZABLE_BOOLEAN_VECTOR = Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, Types.BOOLEAN));
  71     private static final Type SERIALIZABLE_BYTE_VECTOR = Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, Types.BYTE));
  72     private static final Type SERIALIZABLE_SHORT_VECTOR = Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, Types.SHORT));
  73     private static final Type SERIALIZABLE_INTEGER_VECTOR = Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, Types.INTEGER));
  74     private static final Type SERIALIZABLE_LONG_VECTOR = Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, Types.LONG));
  75     private static final Type SERIALIZABLE_FLOAT_VECTOR = Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, Types.FLOAT));
  76     private static final Type SERIALIZABLE_DOUBLE_VECTOR = Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, Types.DOUBLE));
  77
  78     private static final Type SERIALIZABLE_TUPLE0 = Types.pred(Types.SERIALIZABLE, Types.tuple());
  79         private static final Type SERIALIZABLE_VARIANT = Types.pred(Types.SERIALIZABLE, Types.VARIANT);
  80
  81     public Reduction reduce(TPred constraint) {
  82         // VecComp
  83         if(constraint.typeClass == Types.VEC_COMP) {
  84             Type parameter = Types.canonical(constraint.parameters[0]);
  85             if(parameter.isGround())
  86                 return new Reduction(new ELiteral(new ClassConstant(Types.pred(Types.VEC_COMP, parameter), parameter)),
  87                         Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
  88         }
  89         // Serializable
  90         if(constraint.typeClass == Types.SERIALIZABLE) {
  91             Type parameter = Types.canonical(constraint.parameters[0]);
  92             if(parameter instanceof TCon) {
  93                 TCon con = (TCon)parameter;
  94                 if(con == Types.DOUBLE)
  95                     return new Reduction(
  96                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "DOUBLE", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/DoubleBinding"), SERIALIZABLE_DOUBLE, -1)),
  97                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
  98                 else if(con == Types.STRING)
  99                     return new Reduction(
 100                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "STRING", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/StringBinding"), SERIALIZABLE_STRING, -1)),
 101                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 102                 else if(con == Types.INTEGER)
 103                     return new Reduction(
 104                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "INTEGER", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/IntegerBinding"), SERIALIZABLE_INTEGER, -1)),
 105                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 106                 else if(con == Types.BOOLEAN)
 107                     return new Reduction(
 108                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "BOOLEAN", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/BooleanBinding"), SERIALIZABLE_BOOLEAN, -1)),
 109                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 110                 else if(con == Types.BYTE)
 111                     return new Reduction(
 112                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "BYTE", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ByteBinding"), SERIALIZABLE_BYTE, -1)),
 113                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 114                 else if(con == Types.FLOAT)
 115                     return new Reduction(
 116                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "FLOAT", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/FloatBinding"), SERIALIZABLE_FLOAT, -1)),
 117                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 118                 else if(con == Types.LONG)
 119                     return new Reduction(
 120                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "LONG", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/LongBinding"), SERIALIZABLE_LONG, -1)),
 121                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 122                 else if(con == Types.tupleConstructor(0))
 123                     return new Reduction(
 124                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "VOID", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/Binding"), SERIALIZABLE_TUPLE0, -1)),
 125                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 126                 else if(con == Types.VARIANT)
 127                     return new Reduction(
 128                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "VARIANT", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/VariantBinding"), SERIALIZABLE_VARIANT, -1)),
 129                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 130                 else if(con == Types.DOUBLE_ARRAY)
 131                     return new Reduction(
 132                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "DOUBLE_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_DOUBLE_ARRAY, -1)),
 133                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 134                 else if(con == Types.INTEGER_ARRAY)
 135                     return new Reduction(
 136                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "INTEGER_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_INTEGER_ARRAY, -1)),
 137                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 138                 else if(con == Types.BOOLEAN_ARRAY)
 139                     return new Reduction(
 140                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "BOOLEAN_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_BOOLEAN_ARRAY, -1)),
 141                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 142                 else if(con == Types.BYTE_ARRAY)
 143                     return new Reduction(
 144                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "BYTE_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_BYTE_ARRAY, -1)),
 145                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 146                 else if(con == Types.FLOAT_ARRAY)
 147                     return new Reduction(
 148                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "FLOAT_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_FLOAT_ARRAY, -1)),
 149                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 150                 else if(con == Types.LONG_ARRAY)
 151                     return new Reduction(
 152                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "LONG_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_LONG_ARRAY, -1)),
 153                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 154             }
 155             else if(parameter instanceof TApply) {
 156                 TApply apply1 = (TApply)parameter;
 157                 Type f1 = Types.canonical(apply1.function);
 158                 Type p1 = Types.canonical(apply1.parameter);
 159                 if(f1 instanceof TCon) {
 160                     TCon con = (TCon)f1;
 161                     if(con == Types.LIST)
 162                         return new Reduction(
 163                             new ELiteral(new JavaConstructor("org/simantics/databoard/binding/impl/ArrayListBinding", Types.NO_EFFECTS,
 164                                     Types.pred(Types.SERIALIZABLE, Types.list(p1)), Types.pred(Types.SERIALIZABLE, p1))),
 165                             Type.EMPTY_ARRAY, new TPred[] { Types.pred(Types.SERIALIZABLE, p1) });
 166                     else if(con == Types.MAYBE)
 167                         return new Reduction(
 168                             new ELiteral(new JavaConstructor("org/simantics/databoard/binding/impl/OptionalBindingDefault", Types.NO_EFFECTS,
 169                                     Types.pred(Types.SERIALIZABLE, Types.apply(Types.MAYBE, p1)), Types.pred(Types.SERIALIZABLE, p1))),
 170                             Type.EMPTY_ARRAY, new TPred[] { Types.pred(Types.SERIALIZABLE, p1) });
 171                     else if(con == Types.VECTOR) {
 172                         if (p1 == Types.DOUBLE)
 173                                     return new Reduction(
 174                                             new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "DOUBLE_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_DOUBLE_VECTOR, -1)),
 175                                                     Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 176                         else if(p1 == Types.INTEGER)
 177                             return new Reduction(
 178                                     new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "INTEGER_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_INTEGER_VECTOR, -1)),
 179                                             Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 180                         else if(p1 == Types.BOOLEAN)
 181                             return new Reduction(
 182                                     new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "BOOLEAN_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_BOOLEAN_VECTOR, -1)),
 183                                             Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 184                         else if(p1 == Types.BYTE)
 185                             return new Reduction(
 186                                     new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "BYTE_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_BYTE_VECTOR, -1)),
 187                                             Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 188                         else if(p1 == Types.FLOAT)
 189                             return new Reduction(
 190                                     new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "FLOAT_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_FLOAT_VECTOR, -1)),
 191                                             Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 192                         else if(p1 == Types.LONG)
 193                             return new Reduction(
 194                                     new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "LONG_ARRAY", Types.NO_EFFECTS, TypeDesc.forClass("org/simantics/databoard/binding/ArrayBinding"), SERIALIZABLE_LONG_VECTOR, -1)),
 195                                             Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 196                         else
 197                                 return new Reduction(
 198                                                 new ELiteral(new JavaStaticMethod("org/simantics/databoard/Bindings", "getArrayBinding", Types.NO_EFFECTS,
 199                                     Types.pred(Types.SERIALIZABLE, Types.pred(Types.VECTOR, p1)), Types.pred(Types.SERIALIZABLE, p1))),
 200                             Type.EMPTY_ARRAY, new TPred[] { Types.pred(Types.SERIALIZABLE, p1) });
 201                     }
 202                 }
 203                 else if(f1 instanceof TApply) {
 204                     TApply apply2 = (TApply)parameter;
 205                     Type f2 = Types.canonical(apply2.function);
 206                     Type p2 = Types.canonical(apply2.parameter);
 207                     if(f2 instanceof TCon) {
 208                         TCon con = (TCon)f2;
 209                         /*if(con == Types.tupleConstructor(2)) {
 210                             return new Reduction(
 211                                     new EConstant(Builtins.TUPLE_CONSTRUCTORS[2]new JavaConstructor("org/simantics/databoard/binding/impl/ArrayListBinding", Types.NO_EFFECTS,
 212                                             Types.pred(Types.SERIALIZABLE, p1), Types.pred(Types.SERIALIZABLE, Types.list(p1)))),
 213                                     Type.EMPTY_ARRAY,
 214                                     new TPred[] { Types.pred(Types.SERIALIZABLE, p2), Types.pred(Types.SERIALIZABLE, p1) });
 215                         }*/
 216                     }
 217                 }
 218             }
 219
 220                 // Default to a binding as an ObjectVariantBinding
 221             // This can be applied only if the type is ground type (i.e. does not contain type variables),
 222             // because otherwise the Serializable instance could be provided as a parameter to the function
 223             if(parameter.isGround())
 224                 return new Reduction(
 225                         new ELiteral(new JavaStaticField("org/simantics/databoard/Bindings", "OBJECT", Types.NO_EFFECTS,
 226                                 TypeDesc.forClass("org/simantics/databoard/binding/VariantBinding"), Types.pred(Types.SERIALIZABLE, parameter), -1)),
 227                                 Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 228         }
 229
 230         // Typeable
 231         else if(constraint.typeClass == Types.TYPEABLE) {
 232             Type parameter = Types.canonical(constraint.parameters[0]);
 233             if(parameter instanceof TCon) {
 234                 TCon con = (TCon)parameter;
 235                 return new Reduction(
 236                         new EApply(Locations.NO_LOCATION,
 237                                 new EConstant(Builtins.INSTANCE.getValue("TCon")),
 238                                 new ELiteral(new StringConstant(con.module)),
 239                                 new ELiteral(new StringConstant(con.name))),
 240                                 Type.EMPTY_ARRAY, TPred.EMPTY_ARRAY);
 241             }
 242             else if(parameter instanceof TApply) {
 243                 TApply apply = (TApply)parameter;
 244                 return new Reduction(
 245                         new EConstant(Builtins.INSTANCE.getValue("TApply")),
 246                         Type.EMPTY_ARRAY, new TPred[] {
 247                             Types.pred(Types.TYPEABLE, apply.function),
 248                             Types.pred(Types.TYPEABLE, apply.parameter),
 249                         });
 250             }
 251             else if(parameter instanceof TFun) {
 252                 TFun fun = (TFun)parameter;
 253                 return new Reduction(
 254                         new EConstant(Builtins.INSTANCE.getValue("TFun")),
 255                         Type.EMPTY_ARRAY, new TPred[] {
 256                             Types.pred(Types.TYPEABLE, fun.domain),
 257                             Types.pred(Types.TYPEABLE, fun.effect),
 258                             Types.pred(Types.TYPEABLE, fun.range)
 259                         });
 260             }
 261             else if(parameter instanceof TUnion) {
 262                 TUnion union = (TUnion)parameter;
 263
 264                 /*TPred[] demands = new TPred[union.effects.length];
 265                 for(int i=0;i<union.effects.length;++i)
 266                     demands[i] = Types.pred(Types.TYPEABLE, union.effects[i]);*/
 267                 if(union.effects.length == 0)
 268                 return new Reduction(
 269                             new EConstant(Builtins.INSTANCE.getValue("TPure")),
 270                             Type.EMPTY_ARRAY,
 271                             TPred.EMPTY_ARRAY);
 272             }
 273         }
 274
 275         // Standard case
 276         THashMap<TVar, Type> substitution = new THashMap<TVar, Type>();
 277         for(TypeClassInstance inst : environment.getInstances(constraint.typeClass)) {
 278             if(Types.match(inst.instance, constraint, substitution)) {
 279                 TPred[] demands = new TPred[inst.context.length];
 280                 for(int i=0;i<demands.length;++i) {
 281                     demands[i] = (TPred)inst.context[i].replace(substitution);
 282                 }
 283                 Type[] parameters = new Type[inst.generatorParameters.length];
 284                 for(int i=0;i<parameters.length;++i) {
 285                     Type parameter = substitution.get(inst.generatorParameters[i]);
 286                     if(parameter == null)
 287                         parameter = inst.generatorParameters[i]; // TODO Is this correct?
 288                     parameters[i] = parameter;
 289                 }
 290                 return new Reduction(new ELiteral(inst.generator), parameters, demands);
 291             }
 292             else
 293                 substitution.clear();
 294         }
 295         return null;
 296     }
 297 }