Examples of com.sun.tools.javac.code.Types

com.sun.tools.javac.code.Types
Utility class containing various operations on types.
Unless other names are more illustrative, the following naming conventions should be observed in this file:

t

If the first argument to an operation is a type, it should be named t.

s

Similarly, if the second argument to an operation is a type, it should be named s.

ts

If an operations takes a list of types, the first should be named ts.

ss

A second list of types should be named ss.

This is NOT part of any supported API. If you write code that depends on this, you do so at your own risk. This code and its internal interfaces are subject to change or deletion without notice.

    super(typeToCompare);
  }


  @Override
  public boolean matches(T tree, VisitorState state) {
    Types types = state.getTypes();
    Type typeToCompare = typeToCompareSupplier.get(state);
    return (typeToCompare != null &&
        types.isSubtype(((JCTree) tree).type, types.erasure(typeToCompare)));
  }

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    super(typeToCompare);
  }


  @Override
  public boolean matches(T tree, VisitorState state) {
    Types types = state.getTypes();
    Type typeToCompare = typeToCompareSupplier.get(state);
    return (typeToCompare != null &&
        types.isCastable(((JCTree) tree).type, types.erasure(typeToCompare)));
  }

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    Fix fix = null;


    ExpressionTree leftOperand = tree.getLeftOperand();
    ExpressionTree rightOperand = tree.getRightOperand();
    Type leftType = ((JCTree) leftOperand).type;
    Types types = state.getTypes();
    Symtab symtab = state.getSymtab();


    /**
     * Try to figure out what they were trying to do.
     * Cases:
     * 1) (foo == foo) ==> (foo == other.foo)
     * 2) (foo == this.foo) ==> (other.foo == this.foo)
     * 3) (this.foo == foo) ==> (this.foo == other.foo)
     * 4) (this.foo == this.foo) ==> (this.foo == other.foo)
     */


    // Choose argument to replace.
    ExpressionTree toReplace;
    if (rightOperand.getKind() == Kind.IDENTIFIER) {
      toReplace = rightOperand;
    } else if (leftOperand.getKind() == Kind.IDENTIFIER) {
      toReplace = leftOperand;
    } else {
      // If we don't have a good reason to replace one or the other, replace the second.
      toReplace = rightOperand;
    }


    // Find containing block
    TreePath path = state.getPath();
    while (path.getLeaf() != null && path.getLeaf().getKind() != Kind.CLASS
        && path.getLeaf().getKind() != Kind.BLOCK) {
      path = path.getParentPath();
    }
    if (path.getLeaf() != null) {
      List<? extends JCTree> members;
      // Must be block or class
      if (path.getLeaf().getKind() == Kind.CLASS) {
        members = ((JCClassDecl) path.getLeaf()).getMembers();
      } else {
        members = ((JCBlock) path.getLeaf()).getStatements();
      }
      for (JCTree jcTree : members) {
        if (jcTree.getKind() == Kind.VARIABLE) {
          JCVariableDecl declaration = (JCVariableDecl) jcTree;
          TypeSymbol variableTypeSymbol = declaration.getType().type.tsym;


          if (ASTHelpers.getSymbol(toReplace).isMemberOf(variableTypeSymbol, state.getTypes())) {
            if (toReplace.getKind() == Kind.IDENTIFIER) {
              fix = SuggestedFix.prefixWith(toReplace, declaration.getName() + ".");
            } else {
              fix = SuggestedFix.replace(
                  ((JCFieldAccess) toReplace).getExpression(), declaration.getName().toString());
            }
          }
        }
      }
    }


    if (fix == null) {
      // No good replacement, let's try something else!


      // For floats or doubles, y!=y -> isNaN(y)
      if (tree.getKind() == Tree.Kind.EQUAL_TO) {
        fixedExpression.append("!");
      }
      if (types.isSameType(leftType, symtab.floatType)) {
        fixedExpression.append("Float.isNaN(" + leftOperand + ")");
        fix = SuggestedFix.replace(tree, fixedExpression.toString());
      } else if (types.isSameType(leftType, symtab.doubleType)) {
        fixedExpression.append("Double.isNaN(" + leftOperand + ")");
        fix = SuggestedFix.replace(tree, fixedExpression.toString());
      } else {


        // last resort, just replace with true or false

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    super(typeToCompare);
  }


  @Override
  public boolean matches(T tree, VisitorState state) {
    Types types = state.getTypes();
    Type typeToCompare = typeToCompareSupplier.get(state);
    return (typeToCompare != null &&
        types.isSameType(((JCTree) tree).type, typeToCompare));
  }

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                    List.<Pair<Symbol.MethodSymbol, Attribute>>of(
                    new Pair<Symbol.MethodSymbol, Attribute>(profileValue, new Attribute.Constant(syms.intType, i))));
        }


        Type.moreInfo = true;
        Types types = Types.instance(task.getContext());
        Pool pool = new Pool(types);
        for (JavaFileObject file : fm.list(jarLocation, "", EnumSet.of(CLASS), true)) {
            String className = fm.inferBinaryName(jarLocation, file);
            int index = className.lastIndexOf('.');
            String pckName = index == -1 ? "" : className.substring(0, index);

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   */
  public static TypeMirror leastUpperBound(ProcessingEnvironment processingEnv, TypeMirror tm1, TypeMirror tm2) {
    Type t1 = (Type) tm1;
    Type t2 = (Type) tm2;
    JavacProcessingEnvironment javacEnv = (JavacProcessingEnvironment) processingEnv;
    Types types = Types.instance(javacEnv.getContext());
    if (types.isSameType(t1, t2)) {
      // Special case if the two types are equal.
      return t1;
    }
    // Handle the 'null' type manually (not done by types.lub).
    if (t1.getKind() == TypeKind.NULL) {
      return t2;
    }
    if (t2.getKind() == TypeKind.NULL) {
      return t1;
    }
    // Special case for primitives.
    if (TypesUtils.isPrimitive(t1) || TypesUtils.isPrimitive(t2)) {
      if (types.isAssignable(t1, t2)) {
        return t2;
      } else if (types.isAssignable(t2, t1)) {
        return t1;
      } else {
        return processingEnv.getTypeUtils().getNoType(TypeKind.NONE);
      }
    }
    if (t1.getKind() == TypeKind.WILDCARD) {
      WildcardType wc1 = (WildcardType) t1;
      Type bound = (Type) wc1.getExtendsBound();
      if (bound == null) {
        // Implicit upper bound of java.lang.Object
        Elements elements = processingEnv.getElementUtils();
        return elements.getTypeElement("java.lang.Object").asType();
      }
      t1 = bound;
    }
    if (t2.getKind() == TypeKind.WILDCARD) {
      WildcardType wc2 = (WildcardType) t2;
      Type bound = (Type) wc2.getExtendsBound();
      if (bound == null) {
        // Implicit upper bound of java.lang.Object
        Elements elements = processingEnv.getElementUtils();
        return elements.getTypeElement("java.lang.Object").asType();
      }
      t2 = bound;
    }
    return types.lub(t1, t2);
  }

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   */
  public static TypeMirror greatestLowerBound(ProcessingEnvironment processingEnv, TypeMirror tm1, TypeMirror tm2) {
    Type t1 = (Type) tm1;
    Type t2 = (Type) tm2;
    JavacProcessingEnvironment javacEnv = (JavacProcessingEnvironment) processingEnv;
    Types types = Types.instance(javacEnv.getContext());
    if (types.isSameType(t1, t2)) {
      // Special case if the two types are equal.
      return t1;
    }
    // Handle the 'null' type manually.
    if (t1.getKind() == TypeKind.NULL) {
      return t1;
    }
    if (t2.getKind() == TypeKind.NULL) {
      return t2;
    }
    // Special case for primitives.
    if (TypesUtils.isPrimitive(t1) || TypesUtils.isPrimitive(t2)) {
      if (types.isAssignable(t1, t2)) {
        return t1;
      } else if (types.isAssignable(t2, t1)) {
        return t2;
      } else {
        // Javac types.glb returns TypeKind.Error when the GLB does
        // not exist, but we can't create one. Use TypeKind.NONE
        // instead.
        return processingEnv.getTypeUtils().getNoType(TypeKind.NONE);
      }
    }
    if (t1.getKind() == TypeKind.WILDCARD) {
      return t2;
    }
    if (t2.getKind() == TypeKind.WILDCARD) {
      return t1;
    }
    return types.glb(t1, t2);
  }

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com.google.errorprone.bugpatterns.SelfEquality

com.google.errorprone.matchers.IsCastableTo

com.google.errorprone.matchers.IsSameType

com.google.errorprone.matchers.IsSubtypeOf

com.sun.tools.javac.code.Attribute.RetentionPolicy

com.sun.tools.javac.code.Scope

com.sun.tools.javac.code.Symbol

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