var pullRoot = function(tokens) {
var template = '';
if (lex.check(tokens[0], {token: 'space'})) {
template = tokens.shift().repr + template;
}
template += R.repeatN('#', tokens.length || 0).join('');
return astNode('expr', tokens, {template: template});
};
var astNode = function(nodeType, children, options) {
children = children || [];
options = options || {};
var template = options.template || R.repeatN('#', children.length).join('');
delete options.template;
return {
id: options.id || undefined,
type: 'ASTNode',
node: nodeType,
template: template,
children: children,
options: options
};
};