Module token_role 

The role a node plays in an expression: operator, operand, or neither.

This is a syntactic classification, not a metric one. Whether a node is an operator or an operand is decided by the grammar — + and a call expression are operators, an identifier and a string literal are operands — and each language’s answer lives in its Getter::get_op_type table beside the rest of its classifiers.

Halstead is the metric that consumes it today, and until #1376 the type was named after that consumer. It is not Halstead-specific: anything that reasons about operator/operand structure can use it, which is why it sits in the parse layer rather than the metric. metrics::halstead re-exports it, and keeps the old HalsteadType spelling as a deprecated alias.

Enums

TokenRole

The role a node plays in an expression.