bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/codegen/ssa/exits/Throw.java

   1 package org.simantics.scl.compiler.internal.codegen.ssa.exits;
   2
   3 import java.util.ArrayList;
   4
   5 import org.cojen.classfile.TypeDesc;
   6 import org.simantics.scl.compiler.internal.codegen.continuations.Cont;
   7 import org.simantics.scl.compiler.internal.codegen.continuations.ContRef;
   8 import org.simantics.scl.compiler.internal.codegen.references.Val;
   9 import org.simantics.scl.compiler.internal.codegen.references.ValRef;
  10 import org.simantics.scl.compiler.internal.codegen.ssa.SSABlock;
  11 import org.simantics.scl.compiler.internal.codegen.ssa.SSAExit;
  12 import org.simantics.scl.compiler.internal.codegen.ssa.SSAFunction;
  13 import org.simantics.scl.compiler.internal.codegen.utils.Constants;
  14 import org.simantics.scl.compiler.internal.codegen.utils.CopyContext;
  15 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;
  16 import org.simantics.scl.compiler.internal.codegen.utils.PrintingContext;
  17 import org.simantics.scl.compiler.internal.codegen.utils.SSAValidationContext;
  18 import org.simantics.scl.compiler.types.TVar;
  19 import org.simantics.scl.compiler.types.Type;
  20 import org.simantics.scl.runtime.exceptions.MatchingException;
  21
  22 public class Throw extends SSAExit {
  23
  24     public static final TypeDesc RuntimeException =
  25             TypeDesc.forClass(RuntimeException.class);
  26     public static final TypeDesc MatchingException =
  27             TypeDesc.forClass(MatchingException.class);
  28
  29     TypeDesc exceptionClass;
  30     String description;
  31
  32     public Throw(TypeDesc exceptionClass, String description) {
  33         this.exceptionClass = exceptionClass;
  34         this.description = description;
  35     }
  36
  37     @Override
  38     public void toString(PrintingContext context) {
  39         context.append("throw\n");
  40         //context.append(exception);
  41     }
  42
  43     @Override
  44     public void generateCode(MethodBuilder mb) {
  45         //mb.push(exception.getBinding());
  46         //cb.mapLineNumber(location);
  47         mb.newObject(exceptionClass);
  48         mb.dup();
  49         if(description == null)
  50             mb.invokeConstructor(exceptionClass, Constants.EMPTY_TYPEDESC_ARRAY);
  51         else {
  52             mb.loadConstant(description);
  53             mb.invokeConstructor(exceptionClass, new TypeDesc[] {TypeDesc.STRING});
  54         }
  55         mb.throwObject();
  56     }
  57
  58     @Override
  59     public void validate(SSAValidationContext context) {
  60     }
  61
  62     @Override
  63     public void destroy() {
  64         // TODO
  65     }
  66
  67     @Override
  68     public SSAExit copy(CopyContext context) {
  69         return new Throw(exceptionClass, description);
  70     }
  71
  72     @Override
  73     public void replace(TVar[] vars, Type[] replacements) {
  74     }
  75
  76     @Override
  77     public void collectFreeVariables(SSAFunction function,
  78             ArrayList<ValRef> vars) {
  79     }
  80
  81     @Override
  82     public Cont addParametersInFrontOf(ContRef contRef, Val[] newParameters, Val[] oldParameters,
  83             Cont proxy) {
  84         return proxy;
  85     }
  86
  87     @Override
  88     public SSABlock[] getSuccessors() {
  89         return SSABlock.EMPTY_ARRAY;
  90     }
  91 }