ysjj-system/node_modules/mathjs/lib/esm/function/algebra/simplify/wildcards.js

import { isConstantNode, isFunctionNode, isOperatorNode, isParenthesisNode } from '../../../utils/is.js';
export { isConstantNode, isSymbolNode as isVariableNode } from '../../../utils/is.js';
export function isNumericNode(x) {
  return isConstantNode(x) || isOperatorNode(x) && x.isUnary() && isConstantNode(x.args[0]);
}
export function isConstantExpression(x) {
  if (isConstantNode(x)) {
    // Basic Constant types
    return true;
  }
  if ((isFunctionNode(x) || isOperatorNode(x)) && x.args.every(isConstantExpression)) {
    // Can be constant depending on arguments
    return true;
  }
  if (isParenthesisNode(x) && isConstantExpression(x.content)) {
    // Parenthesis are transparent
    return true;
  }
  return false; // Probably missing some edge cases
}