Module error 

R error types, control flow signals, and condition constructors.

Enums

ConditionKind

The kind of R condition (error, warning, or message).

RError

R runtime error — wraps any module error with an R-facing category and preserves the full error chain via Arc<dyn Error>.

RErrorKind

The R-facing error category — determines how R’s condition system classifies the error.

RFlow

Combined error/signal type for the evaluator. Builtins return Result<RValue, RError>, the evaluator returns Result<RValue, RFlow>.

RSignal

Control flow signals — not errors, but propagated via Result for convenience

Functions

get_class

Get the class vector from an RValue (if it has a class attribute).

make_condition

Create an R condition object (a list with message, call, and class attributes).

make_condition_with_call

Create an R condition object with an explicit call value.