Are template literals supported by The Graph?

[PaulRBerg]

I scoured through the historical questions asked in The Graph's Discord server (channel #subgraph-development), but it is still not clear to me if we can use template literals in our mappings.

For example:

export function getActionId(event: ethereum.Event): string {
  const hash = event.transaction.hash.toHexString();
  const index = event.logIndex.toString();
  return `${hash}-${index}`;
}

Can we write it like that? Or do we have to use concat instead?

It looks like AssemblyScript supports template literal since v0.18.17

[PaulRBerg]

Relevant conversation from The Graph's Discord server:

[PaulRBerg]

It looks like they are supported!