extractReadsAndWrites

function extractReadsAndWrites(tokens): {
  reads: string[];
  writes: string[];
};

Defined in: packages/engine/src/engine/ExpressionEngineSafety.ts:205

Extract variable reads and writes from a token stream.

Handles both IDENT and UNIT tokens as potential variable references. UNIT tokens occur when the variable name collides with a known unit (e.g., “b” for bits, “s” for seconds). The colon prefix unambiguously signals a variable definition context (handled by VariableParselet). A standalone UNIT token is only a real variable reference when it isn’t in unit-literal position (see isUnitLiteralContext) otherwise it’s a quantity/conversion unit name, never LOAD_VAR’d.

Also detects user-defined-function DEFINITIONS (name(params) = body) as a read+write of the function’s own name, mirroring :name = value’s existing convention of registering the defined name as both, and excludes the definition’s own PARAMETER names from reads/writes entirely (see collectFunctionParamNames). A function CALL (name(args), no trailing =) needs no special detection: the call’s own name falls through to the ordinary bare-identifier read-tracking below, the same as any other LOAD_VAR-producing identifier. This is already correct once calls compile successfully, no change needed.

Parameters

Parameter	Type
tokens	Token[]

Returns

{
  reads: string[];
  writes: string[];
}

reads

reads: string[];

writes

writes: string[];