com.sun.tools.javac.code.Types.lowerBound()方法的使用及代码示例

x33g5p2x  于2022-01-30 转载在 其他  
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本文整理了Java中com.sun.tools.javac.code.Types.lowerBound()方法的一些代码示例，展示了Types.lowerBound()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Types.lowerBound()方法的具体详情如下：
包路径：com.sun.tools.javac.code.Types
类名称：Types
方法名：lowerBound

Types.lowerBound介绍

[英]The "lvalue conversion".
The lower bound of most types is the type itself. Wildcards, on the other hand have upper and lower bounds.
[中]“左值转换”。
大多数类型的下限是类型本身。另一方面，通配符有上界和下界。

代码示例

代码示例来源：origin: org.jvnet.sorcerer/sorcerer-javac

public Type apply(Type t) {
    return lowerBound(t);
  }
};

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

public Type apply(Type t) {
    return lowerBound(t);
  }
};

代码示例来源：origin: sc.fiji/javac

public Type apply(Type t) {
    return lowerBound(t);
  }
};

代码示例来源：origin: sc.fiji/javac

public Type visitType(Type t, Void s) {
  return high ? upperBound(t) : lowerBound(t);
}

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

public Type visitType(Type t, Void s) {
  return high ? upperBound(t) : lowerBound(t);
}

代码示例来源：origin: org.jvnet.sorcerer/sorcerer-javac

void debugContainsType(WildcardType t, Type s) {
  System.err.println();
  System.err.format(" does %s contain %s?%n", t, s);
  System.err.format(" %s U(%s) <: U(%s) %s = %s%n",
           upperBound(s), s, t, U(t),
           t.isSuperBound()
           || isSubtypeNoCapture(upperBound(s), U(t)));
  System.err.format(" %s L(%s) <: L(%s) %s = %s%n",
           L(t), t, s, lowerBound(s),
           t.isExtendsBound()
           || isSubtypeNoCapture(L(t), lowerBound(s)));
  System.err.println();
}

代码示例来源：origin: sc.fiji/javac

void debugContainsType(WildcardType t, Type s) {
  System.err.println();
  System.err.format(" does %s contain %s?%n", t, s);
  System.err.format(" %s U(%s) <: U(%s) %s = %s%n",
           upperBound(s), s, t, U(t),
           t.isSuperBound()
           || isSubtypeNoCapture(upperBound(s), U(t)));
  System.err.format(" %s L(%s) <: L(%s) %s = %s%n",
           L(t), t, s, lowerBound(s),
           t.isExtendsBound()
           || isSubtypeNoCapture(L(t), lowerBound(s)));
  System.err.println();
}

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

@Override
public Void visitWildcardType(WildcardType source, Type target) throws AdaptFailure {
  if (source.isExtendsBound())
    adaptRecursive(upperBound(source), upperBound(target));
  else if (source.isSuperBound())
    adaptRecursive(lowerBound(source), lowerBound(target));
  return null;
}

代码示例来源：origin: org.jvnet.sorcerer/sorcerer-javac

public boolean isSubtype(Type t, Type s, boolean capture) {
  if (t == s)
    return true;
  if (s.tag >= firstPartialTag)
    return isSuperType(s, t);
  Type lower = lowerBound(s);
  if (s != lower)
    return isSubtype(capture ? capture(t) : t, lower, false);
  return isSubtype.visit(capture ? capture(t) : t, s);
}
// where

代码示例来源：origin: org.jvnet.sorcerer/sorcerer-javac

@Override
public Boolean visitClassType(ClassType t, Type s) {
  if (t == s)
    return true;
  if (s.tag >= firstPartialTag)
    return visit(s, t);
  if (s.isSuperBound() && !s.isExtendsBound())
    return visit(t, upperBound(s)) && visit(t, lowerBound(s));
  if (t.isCompound() && s.isCompound()) {
    if (!visit(supertype(t), supertype(s)))
      return false;
    HashSet<SingletonType> set = new HashSet<SingletonType>();
    for (Type x : interfaces(t))
      set.add(new SingletonType(x));
    for (Type x : interfaces(s)) {
      if (!set.remove(new SingletonType(x)))
        return false;
    }
    return (set.size() == 0);
  }
  return t.tsym == s.tsym
    && visit(t.getEnclosingType(), s.getEnclosingType())
    && containsTypeEquivalent(t.getTypeArguments(), s.getTypeArguments());
}

代码示例来源：origin: sc.fiji/javac

@Override
public Boolean visitWildcardType(WildcardType t, Type s) {
  if (s.tag >= firstPartialTag)
    return containedBy(s, t);
  else {
    // debugContainsType(t, s);
    return isSameWildcard(t, s)
      || isCaptureOf(s, t)
      || ((t.isExtendsBound() || isSubtypeNoCapture(L(t), lowerBound(s))) &&
        (t.isSuperBound() || isSubtypeNoCapture(upperBound(s), U(t))));
  }
}

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

void validateAnnotationType(DiagnosticPosition pos, Type type) {
  if (type.isPrimitive()) return;
  if (types.isSameType(type, syms.stringType)) return;
  if ((type.tsym.flags() & Flags.ENUM) != 0) return;
  if ((type.tsym.flags() & Flags.ANNOTATION) != 0) return;
  if (types.lowerBound(type).tsym == syms.classType.tsym) return;
  if (types.isArray(type) && !types.isArray(types.elemtype(type))) {
    validateAnnotationType(pos, types.elemtype(type));
    return;
  }
  log.error(pos, "invalid.annotation.member.type");
}

代码示例来源：origin: org.jvnet.sorcerer/sorcerer-javac

@Override
public Boolean visitWildcardType(WildcardType t, Type s) {
  if (s.tag >= firstPartialTag)
    return containedBy(s, t);
  else {
    // debugContainsType(t, s);
    return isSameWildcard(t, s)
      || isCaptureOf(s, t)
      || ((t.isExtendsBound() || isSubtypeNoCapture(L(t), lowerBound(s))) &&
        (t.isSuperBound() || isSubtypeNoCapture(upperBound(s), U(t))));
  }
}

代码示例来源：origin: org.jvnet.sorcerer/sorcerer-javac

void validateAnnotationType(DiagnosticPosition pos, Type type) {
if (type.isPrimitive()) return;
if (types.isSameType(type, syms.stringType)) return;
  if ((type.tsym.flags() & Flags.ENUM) != 0) return;
if ((type.tsym.flags() & Flags.ANNOTATION) != 0) return;
if (types.lowerBound(type).tsym == syms.classType.tsym) return;
if (types.isArray(type) && !types.isArray(types.elemtype(type))) {
  validateAnnotationType(pos, types.elemtype(type));
  return;
}
log.error(pos, "invalid.annotation.member.type");
}

代码示例来源：origin: sc.fiji/javac

void validateAnnotationType(DiagnosticPosition pos, Type type) {
  if (type.isPrimitive()) return;
  if (types.isSameType(type, syms.stringType)) return;
  if ((type.tsym.flags() & Flags.ENUM) != 0) return;
  if ((type.tsym.flags() & Flags.ANNOTATION) != 0) return;
  if (types.lowerBound(type).tsym == syms.classType.tsym) return;
  if (types.isArray(type) && !types.isArray(types.elemtype(type))) {
    validateAnnotationType(pos, types.elemtype(type));
    return;
  }
  log.error(pos, "invalid.annotation.member.type");
}

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

@Override
      public Boolean visitWildcardType(WildcardType t, Type s) {
        if (s.isPartial())
          return containedBy(s, t);
        else {
//                    debugContainsType(t, s);
          return isSameWildcard(t, s)
            || isCaptureOf(s, t)
            || ((t.isExtendsBound() || isSubtypeNoCapture(L(t), lowerBound(s))) &&
              (t.isSuperBound() || isSubtypeNoCapture(upperBound(s), U(t))));
        }
      }

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

@Override
public Boolean visitClassType(ClassType t, Type s) {
  if (t == s)
    return true;
  if (s.isPartial())
    return visit(s, t);
  if (s.isSuperBound() && !s.isExtendsBound())
    return visit(t, upperBound(s)) && visit(t, lowerBound(s));
  if (t.isCompound() && s.isCompound()) {
    if (!visit(supertype(t), supertype(s)))
      return false;
    HashSet<UniqueType> set = new HashSet<UniqueType>();
    for (Type x : interfaces(t))
      set.add(new UniqueType(x.unannotatedType(), Types.this));
    for (Type x : interfaces(s)) {
      if (!set.remove(new UniqueType(x.unannotatedType(), Types.this)))
        return false;
    }
    return (set.isEmpty());
  }
  return t.tsym == s.tsym
    && visit(t.getEnclosingType(), s.getEnclosingType())
    && containsTypes(t.getTypeArguments(), s.getTypeArguments());
}

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

/** Check that a type is within some bounds.
 *
 *  Used in TypeApply to verify that, e.g., X in {@code V<X>} is a valid
 *  type argument.
 *  @param a             The type that should be bounded by bs.
 *  @param bound         The bound.
 */
private boolean checkExtends(Type a, Type bound) {
   if (a.isUnbound()) {
     return true;
   } else if (!a.hasTag(WILDCARD)) {
     a = types.upperBound(a);
     return types.isSubtype(a, bound);
   } else if (a.isExtendsBound()) {
     return types.isCastable(bound, types.upperBound(a), types.noWarnings);
   } else if (a.isSuperBound()) {
     return !types.notSoftSubtype(types.lowerBound(a), bound);
   }
   return true;
 }

代码示例来源：origin: sc.fiji/javac

public boolean isSubtype(Type t, Type s, boolean capture) {
  if (t == s)
    return true;
  if (s.tag >= firstPartialTag)
    return isSuperType(s, t);
  if (s.isCompound()) {
    for (Type s2 : interfaces(s).prepend(supertype(s))) {
      if (!isSubtype(t, s2, capture))
        return false;
    }
    return true;
  }
  Type lower = lowerBound(s);
  if (s != lower)
    return isSubtype(capture ? capture(t) : t, lower, false);
  return isSubtype.visit(capture ? capture(t) : t, s);
}
// where

代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac

@Override
  public Boolean visitWildcardType(WildcardType t, Type s) {
    if (t.isUnbound())
      return false;
    if (!s.hasTag(WILDCARD)) {
      if (t.isExtendsBound())
        return notSoftSubtypeRecursive(s, t.type);
      else
        return notSoftSubtypeRecursive(t.type, s);
    }
    if (s.isUnbound())
      return false;
    if (t.isExtendsBound()) {
      if (s.isExtendsBound())
        return !isCastableRecursive(t.type, upperBound(s));
      else if (s.isSuperBound())
        return notSoftSubtypeRecursive(lowerBound(s), t.type);
    } else if (t.isSuperBound()) {
      if (s.isExtendsBound())
        return notSoftSubtypeRecursive(t.type, upperBound(s));
    }
    return false;
  }
};

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