Module nom::error

Error management

Parsers are generic over their error type, requiring that it implements the error::ParseError<Input> trait.

Structs

Error

default error type, only contains the error’ location and code

VerboseErroralloc

This error type accumulates errors and their position when backtracking through a parse tree. With some post processing (cf examples/json.rs), it can be used to display user friendly error messages

Enums

ErrorKind

Indicates which parser returned an error

VerboseErrorKindalloc

Error context for VerboseError

Traits

ContextError

This trait is required by the context combinator to add a static string to an existing error

FromExternalError

This trait is required by the map_res combinator to integrate error types from external functions, like std::str::FromStr

ParseError

This trait must be implemented by the error type of a nom parser.

Functions

append_error

Combines an existing error with a new one created from the input position and an ErrorKind. This is useful when backtracking through a parse tree, accumulating error context on the way

context

Create a new error from an input position, a static string and an existing error. This is used mainly in the context combinator, to add user friendly information to errors when backtracking through a parse tree

convert_erroralloc

Transforms a VerboseError into a trace with input position information

dbg_dmpstd

Prints a message and the input if the parser fails.

error_to_u32

Converts an ErrorKind to a number

make_error

Creates an error from the input position and an ErrorKind