returnstmt.java

来自「JDK1.4编译器前端」· Java 代码 · 共 362 行 · 第 1/2 页

package AST;
import java.util.HashSet;import java.util.LinkedHashSet;import java.io.FileNotFoundException;import java.io.File;import java.util.*;import beaver.*;import java.util.ArrayList;import java.util.zip.*;import java.io.*;


public class ReturnStmt extends Stmt implements Cloneable {
    public void flushCache() {
        super.flushCache();
        finallyList_visited = -1;
        finallyList_computed = false;
        finallyList_value = null;
        isDAafter_Variable_visited = new java.util.HashMap(4);
        isDAafter_Variable_values = null;
        isDUafterReachedFinallyBlocks_Variable_visited = new java.util.HashMap(4);
        isDUafterReachedFinallyBlocks_Variable_values = null;
        isDAafterReachedFinallyBlocks_Variable_visited = new java.util.HashMap(4);
        isDAafterReachedFinallyBlocks_Variable_values = null;
        isDUafter_Variable_visited = new java.util.HashMap(4);
        isDUafter_Variable_values = null;
        canCompleteNormally_visited = -1;
        canCompleteNormally_computed = false;
        returnType_visited = -1;
    }
     @SuppressWarnings({"unchecked", "cast"})  public ReturnStmt clone() throws CloneNotSupportedException {
        ReturnStmt node = (ReturnStmt)super.clone();
        node.finallyList_visited = -1;
        node.finallyList_computed = false;
        node.finallyList_value = null;
        node.isDAafter_Variable_visited = new java.util.HashMap(4);
        node.isDAafter_Variable_values = null;
        node.isDUafterReachedFinallyBlocks_Variable_visited = new java.util.HashMap(4);
        node.isDUafterReachedFinallyBlocks_Variable_values = null;
        node.isDAafterReachedFinallyBlocks_Variable_visited = new java.util.HashMap(4);
        node.isDAafterReachedFinallyBlocks_Variable_values = null;
        node.isDUafter_Variable_visited = new java.util.HashMap(4);
        node.isDUafter_Variable_values = null;
        node.canCompleteNormally_visited = -1;
        node.canCompleteNormally_computed = false;
        node.returnType_visited = -1;
        node.in$Circle(false);
        node.is$Final(false);
    return node;
    }
     @SuppressWarnings({"unchecked", "cast"})  public ReturnStmt copy() {
      try {
          ReturnStmt node = (ReturnStmt)clone();
          if(children != null) node.children = (ASTNode[])children.clone();
          return node;
      } catch (CloneNotSupportedException e) {
      }
      System.err.println("Error: Could not clone node of type " + getClass().getName() + "!");
      return null;
    }
     @SuppressWarnings({"unchecked", "cast"})  public ReturnStmt fullCopy() {
        ReturnStmt res = (ReturnStmt)copy();
        for(int i = 0; i < getNumChildNoTransform(); i++) {
          ASTNode node = getChildNoTransform(i);
          if(node != null) node = node.fullCopy();
          res.setChild(node, i);
        }
        return res;
    }
    // Declared in BranchTarget.jrag at line 55

  public void collectBranches(Collection c) {
    c.add(this);
  }

    // Declared in NodeConstructors.jrag at line 62


  public ReturnStmt(Expr expr) {
    this(new Opt(expr));
  }

    // Declared in PrettyPrint.jadd at line 691


  public void toString(StringBuffer s) {
    s.append("return ");
    if(hasResult()) {
      getResult().toString(s);
    }
    s.append(";\n");
  }

    // Declared in java.ast at line 3
    // Declared in java.ast line 217

    public ReturnStmt() {
        super();

        setChild(new Opt(), 0);

    }

    // Declared in java.ast at line 11


    // Declared in java.ast line 217
    public ReturnStmt(Opt<Expr> p0) {
        setChild(p0, 0);
    }

    // Declared in java.ast at line 15


  protected int numChildren() {
    return 1;
  }

    // Declared in java.ast at line 18

  public boolean mayHaveRewrite() { return false; }

    // Declared in java.ast at line 2
    // Declared in java.ast line 217
    public void setResultOpt(Opt<Expr> opt) {
        setChild(opt, 0);
    }

    // Declared in java.ast at line 6


    public boolean hasResult() {
        return getResultOpt().getNumChild() != 0;
    }

    // Declared in java.ast at line 10


     @SuppressWarnings({"unchecked", "cast"})  public Expr getResult() {
        return (Expr)getResultOpt().getChild(0);
    }

    // Declared in java.ast at line 14


    public void setResult(Expr node) {
        getResultOpt().setChild(node, 0);
    }

    // Declared in java.ast at line 17

     @SuppressWarnings({"unchecked", "cast"})  public Opt<Expr> getResultOpt() {
        return (Opt<Expr>)getChild(0);
    }

    // Declared in java.ast at line 21


     @SuppressWarnings({"unchecked", "cast"})  public Opt<Expr> getResultOptNoTransform() {
        return (Opt<Expr>)getChildNoTransform(0);
    }

    // Declared in GOP.jrag at line 197

     public void typeCheck() {
    if(hasResult() && !returnType().isVoid()) {
      if(!getResult().type().assignConversionTo(returnType(), getResult()))
        error("return value must be an instance of " + returnType().typeName() + " which " + getResult().type().typeName() + " is not");
    }
    if(enclosingBodyDecl() instanceof GranuleBody && !getResult().type().isBoolean())
       error("GranuleBody must retuan type boolean!");
    // 8.4.5 8.8.5
    if(returnType().isVoid() && hasResult())
      error("return stmt may not have an expression in void methods");
    // 8.4.5
    if(!returnType().isVoid() && !hasResult())
      error("return stmt must have an expression in non void methods");
    if(enclosingBodyDecl() instanceof InstanceInitializer || enclosingBodyDecl() instanceof StaticInitializer)
      error("Initializers may not return");

  }

    protected int finallyList_visited = -1;
    protected boolean finallyList_computed = false;
    protected ArrayList finallyList_value;
    // Declared in BranchTarget.jrag at line 186
 @SuppressWarnings({"unchecked", "cast"})     public ArrayList finallyList() {
        if(finallyList_computed)