is_literal_source
@rotorsoft/act-root / act/src / is_literal_source
Function: is_literal_source()
is_literal_source(
source):boolean
Defined in: libs/act/src/utils.ts:115
True when source is a literal stream name — it carries no regex
metacharacter, so every adapter treats it as an exact match. This is the
fast, index-friendly path and covers every autoclose/dynamic-resolver
source (bare stream names). A false return means the source is a
pattern (contains ^ $ . * + ? ( ) [ ] { } | \) and must be compiled
as a RegExp before matching — the shape the calculator's static
source: "^(A|B)$" reaction relies on.
The single source of truth for literal-vs-pattern classification across the InMemory has-work probe, the drain fetch path, and the SQL adapters, so all three agree on which sources take the exact path.
Parameters
source
string
Returns
boolean
Example
is_literal_source("Board"); // → true (exact lookup)
is_literal_source("^(A|B)$"); // → false (compile as RegExp)