Module result 

Error and result types for the python-ast crate.

This module re-exports anyhow_tracing::Error / anyhow_tracing::Result as the crate-wide Error / Result types so that errors carry structured fields (location, feature, expected, found, …) instead of pre-formatted Strings, which allows tracing/logging consumers — and downstream code that wants to recover the typed payload via anyhow_tracing::Error::downcast_ref — to inspect the original data without having to re-parse a stringified message.

The concrete error kinds (e.g. ParseError, UnsupportedFeature, BinOpNotYetImplemented) are exposed as small thiserror-derived structs that implement std::error::Error. They are wrapped into anyhow_tracing::Error at the construction site (see the helper constructors on this module’s Error-shim re-exports below: parsing_error, codegen_error, unsupported_feature, type_error, syntax_error). The wrapping carries named fields so structured tracing subscribers see fields rather than a stringified blob, while downcasts still recover the typed payload.

Macros

anyhow

Creates an Error from a format string and arguments, optionally with named fields.

bail

Returns early with an Error.

ensure

Returns early with an Error if a condition is not satisfied.

Structs

BinOpNotYetImplemented

A binary operator the transpiler does not yet handle. Carries the original BinOp AST node so callers can inspect it without having to re-parse a stringified message.

BoolOpNotYetImplemented

CodeGenError

Code generation failed.

CompareNotYetImplemented

Error

An error type that extends anyhow::Error with named fields.

ExprNotYetImplemented

ExprTypeNotYetImplemented

ParseError

Python parsing failed.

SourceLocation

Location information for error reporting.

StatementNotYetImplemented

SyntaxError

The Python source contained invalid syntax.

TypeError

A type mismatch was detected during code generation.

UnaryOpNotYetImplemented

UnknownType

UnsupportedFeature

A Python feature is not yet implemented in the transpiler.

Traits

Context

Extension trait for adding context and fields to errors.

IntoErr

Converts foreign error results into the crate’s structured Result type.

Functions

codegen_error

Create a code generation error with location and helpful guidance.

err_from

Convert any std::error::Error into the crate-wide Error.

error_to_pyerr

Convert a crate Error into a PyErr suitable for returning across the PyO3 boundary. Performs structural downcasting so e.g. SyntaxError becomes PySyntaxError and UnsupportedFeature becomes PyNotImplementedError.

format_error_chain

Render an error and its full source() chain as a single string, so the complete causal context survives type-erased Box<dyn Error> boundaries (whose Display only shows the outermost message).

parsing_error

Create a parsing error with location and helpful guidance.

syntax_error

Create a syntax error with location and helpful guidance.

type_error

Create a type error with location and helpful guidance.

unsupported_feature

Create an unsupported-feature error with location and helpful guidance.

Type Aliases

Result

A type alias for Result<T, Error>.