Module registry 

Function registry — manages lookup and registration of all built-in functions.

Three categories:

• Scalar functions (1-to-1 mapping of inputs to outputs)
• Aggregate functions (N-to-1 reduction)
• Table functions (produce a table of rows)

Structs

FunctionRegistry

Registry of all built-in functions (scalar, aggregate, table).

Enums

AggregateFunction

All built-in aggregate functions.

ArithmeticOp

ArrayOp

Array math functions — element-wise operations on numeric lists.

BlobOp

Blob functions — ported from C++ function/blob/.

BooleanOp

CastTarget

ComparisonOp

DateOp

HashOp

Hash functions — ported from C++ function/hash/.

IntervalOp

Interval constructor functions — ported from C++ function/interval/.

ListOp

MapOp

PathOp

Path functions — operate on recursive rel / path values (NODES, RELS, LENGTH).

ResolvedFunction

A resolved function with its variant.

ScalarFunction

All built-in scalar function variants.

SchemaOp

Schema functions — access metadata about nodes, relationships, and values.

StringOp

StructOp

TableFunction

All built-in table functions.

UnionOp

Union functions — ported from C++ function/union/.

UtilityOp

Utility functions.