C++ (Cpp) ASTNode::prependChild示例

/**
 * In MathML, &lt;plus/> and &lt;times/> are n-ary operators but the infix
 * FormulaParser represents them as binary operators.  To ensure a
 * consistent AST representation, this function is part of the n-ary to
 * binary reduction process.
 */
static void
reduceBinary (ASTNode& node)
{
  if (node.getNumChildren() == 2)
  {
    ASTNode* op = new ASTNode( node.getType() );
    node.swapChildren(op);
    node.prependChild(op);
  }
}

示例#2

显示文件

文件： MathML.cpp 项目： mgaldzic/copasi_api

/**
 * Ensures the given ASTNode has the appropriate number of arguments.  If
 * arguments are missing, appropriate defaults (per the MathML 2.0
 * specification) are added:
 *
 *   log (x) -> log (10, x)
 *   root(x) -> root( 2, x)
 */
static void
checkFunctionArgs (ASTNode& node)
{
  if (node.getNumChildren() == 1)
  {
    if (node.getType() == AST_FUNCTION_LOG)
    {
      ASTNode* child = new ASTNode;
      child->setValue(10);

      node.prependChild(child);
    }
    else if (node.getType() == AST_FUNCTION_ROOT)
    {
      ASTNode* child = new ASTNode;
      child->setValue(2);

      node.prependChild(child);
    }
  }
}