Function trackTrigger

packages/compiler/src/render3/r3_deferred_triggers.ts:473–484

Adds a trigger to a map of triggers.

(
  name: Name,
  allTriggers: t.DeferredBlockTriggers,
  errors: ParseError[],
  trigger: NonNullable<t.DeferredBlockTriggers[Name]>,
)

/** Adds a trigger to a map of triggers. */
function trackTrigger<Name extends keyof t.DeferredBlockTriggers>(
  name: Name,
  allTriggers: t.DeferredBlockTriggers,
  errors: ParseError[],
  trigger: NonNullable<t.DeferredBlockTriggers[Name]>,
) {
  if (allTriggers[name]) {
    errors.push(new ParseError(trigger.sourceSpan, `Duplicate "${name}" trigger is not allowed`));
  } else {
    allTriggers[name] = trigger;
  }
}

function createIdleTrigger(
  parameters: ParsedParameter[],