Struct ParseErrorContext 

pub struct ParseErrorContext {
    pub token_range: Range<usize>,
    pub end_affinity: TokenAffinity,
    pub ty: ContextType,
}

Context attached to a ParseError.

This is generally attached to an error when the parser knows the context of what it is parsing with confidence.

Example

In this code, the parser knows that it is parsing the RHS of an expression when the error occurs.

1 + function
    ^ error

So it will attach a context to the error with an Expression context.

Fields

token_range: Range<usize>

The range of tokens that this context applies.

For example, if the context is a FunctionDefinitionStatement, the range will include the entire function.

In some cases this will end at the token where the error is encountered, however in many cases the parser can match delimiters like { and } to provide more context.

end_affinity: TokenAffinity

Affinity of the last token in the range.

ty: ContextType

The type of context.

Trait Implementations

impl Clone for ParseErrorContext

fn clone(&self) -> ParseErrorContext

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ParseErrorContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.