named_subtemplates.hb

gistfile1.html

<!--
  I'm sure there's a better syntax for naming subtemplates
-->

<h3>This is a list</h3>
<ul>
  {{#each items}}
  {{@cell}}
  <li>
     {{..}}
  </li>
  {{/cell}}
  {{/each}}
</ul>

<!--
var template = Handlebars.compile(...);
.
.
.
template(items);
template.cell(item);
-->

works_today.js

/*
<!--
  I'm sure there's a better syntax for naming subtemplates
-->

<h3>This is a list</h3>
<ul>
  {{#each items}}
  {{#named "cell"}}
  <li>
     {{..}}
  </li>
  {{/named}}
  {{/each}}
</ul>
*/

Handlebars.registerHelper('named', function(name, options) {
  options.data.named[name] = options.fn;
});

var template = Handlebars.compile(..., { data: true });

var named = {};
template(items, { data: { named: named } });
named.cell(item);