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.internal.codegen.utils.ValRefVisitor;
  19 import org.simantics.scl.compiler.types.TVar;
  20 import org.simantics.scl.compiler.types.Type;
  21 import org.simantics.scl.runtime.exceptions.MatchingException;
  22
  23 public class Throw extends SSAExit {
  24
  25     public static final TypeDesc RuntimeException =
  26             TypeDesc.forClass(RuntimeException.class);
  27     public static final TypeDesc MatchingException =
  28             TypeDesc.forClass(MatchingException.class);
  29
  30     TypeDesc exceptionClass;
  31     String description;
  32
  33     public Throw(TypeDesc exceptionClass, String description) {
  34         this.exceptionClass = exceptionClass;
  35         this.description = description;
  36     }
  37
  38     @Override
  39     public void toString(PrintingContext context) {
  40         context.append("throw\n");
  41         //context.append(exception);
  42     }
  43
  44     @Override
  45     public void generateCode(MethodBuilder mb) {
  46         //mb.push(exception.getBinding());
  47         //cb.mapLineNumber(location);
  48         mb.newObject(exceptionClass);
  49         mb.dup();
  50         if(description == null)
  51             mb.invokeConstructor(exceptionClass, Constants.EMPTY_TYPEDESC_ARRAY);
  52         else {
  53             mb.loadConstant(description);
  54             mb.invokeConstructor(exceptionClass, new TypeDesc[] {TypeDesc.STRING});
  55         }
  56         mb.throwObject();
  57     }
  58
  59     @Override
  60     public void validate(SSAValidationContext context) {
  61     }
  62
  63     @Override
  64     public void destroy() {
  65         // TODO
  66     }
  67
  68     @Override
  69     public SSAExit copy(CopyContext context) {
  70         return new Throw(exceptionClass, description);
  71     }
  72
  73     @Override
  74     public void replace(TVar[] vars, Type[] replacements) {
  75     }
  76
  77     @Override
  78     public void collectFreeVariables(SSAFunction function,
  79             ArrayList<ValRef> vars) {
  80     }
  81
  82     @Override
  83     public Cont addParametersInFrontOf(ContRef contRef, Val[] newParameters, Val[] oldParameters,
  84             Cont proxy) {
  85         return proxy;
  86     }
  87
  88     @Override
  89     public SSABlock[] getSuccessors() {
  90         return SSABlock.EMPTY_ARRAY;
  91     }
  92
  93     @Override
  94     public void forValRefs(ValRefVisitor visitor) {
  95     }
  96 }