Module method_return_builder 

Shared utilities for handling method return values in R wrapper generation.

This module provides helpers for generating consistent return value handling across all class systems (Env, R6, S7, S3, S4).

Structs

MethodReturnBuilder

Builder for generating R method body lines with appropriate return handling.

ReturnTails 🔒

Class-specific tail closures, one per ReturnStrategy variant.

Enums

ReturnStrategy

Return handling strategy for class methods.

Functions

condition_check_inline_block

Generate an inline R error-check block for single-expression contexts (S7, S4).

condition_check_lines

Generate the R guard that re-raises a tagged Rust error/condition value.

condition_check_lines_with_default

condition_check_lines with an explicit raise fallback (CallAttribution::raise_default): environment() for an S3 method, whose frame the raise helper turns into the generic’s call (#1851).

standalone_body

Generate a standalone-function R wrapper body.

standalone_body_with_call_default

standalone_body with an explicit raise fallback: sys.call() for the wrapper’s own frame, .mx_call for call = caller wrappers, NULL under call = none and environment() for an S3 method (see crate::r_wrapper_builder::CallAttribution::raise_default).