# Part VI — Forward expand() and Reverse template_extract_text() / template_extract()
tpl  = "site=${site};env=${env};end";
line = expand(tpl, {site: "lmscript.io", env: "prod"});
println("Rendered  : " + line);

rev = template_extract_text(tpl, line);
require(rev.matched, "expected reverse template text match");
println("Extracted : " + json_stringify(rev.value));

rows = template_extract([{kind: "host", name: "$name"}], [
  {kind: "host", name: "lmaws"},
  {kind: "skip", name: "none"},
  {kind: "host", name: "lmcad"}
]);
println("Projected : " + json_stringify(rows.value));