Enum gallop::GrammarError

pub enum GrammarError<'a> {
    EmptyGrammar,
    NoStartSymbol,
    ReservedNonTerminal(NonTerminal<'a>),
    UndefinedNonTerminal(NonTerminal<'a>),
    InvalidGrammar {
        non_terminal: NonTerminal<'a>,
        rule: Rule<'a>,
        rule_element: RuleElement<'a>,
    },
    Conflict {
        non_terminal: NonTerminal<'a>,
        rule: Rule<'a>,
        rule_element: RuleElement<'a>,
    },
}

Possible errors that could happen when creating a Parser

Variants

EmptyGrammar

The Grammar has no rules defined yet

NoStartSymbol

The START Rule is not defined yet (see “Reserved Non-terminals” section)

ReservedNonTerminal(NonTerminal<'a>)

The specified NonTerminal is actually reserved (see “Reserved Non-terminals” section)

UndefinedNonTerminal(NonTerminal<'a>)

The specified NonTerminal is used within a Rule but is not defined yet

InvalidGrammar

Fields

non_terminal: NonTerminal<'a>

The offending NonTerminal

rule: Rule<'a>

The offending Rule

rule_element: RuleElement<'a>

The offending RuleElement

The Grammar is invalid, as specified by:

Conflict

Fields

non_terminal: NonTerminal<'a>

The offending NonTerminal

rule: Rule<'a>

The offending Rule

rule_element: RuleElement<'a>

The offending RuleElement

The Grammar has a conflict, as specified by:

Trait Implementations

impl<'a> Clone for GrammarError<'a>

fn clone(&self) -> GrammarError<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for GrammarError<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq<GrammarError<'a>> for GrammarError<'a>

fn eq(&self, other: &GrammarError<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &GrammarError<'a>) -> bool

This method tests for !=.

impl<'a> StructuralPartialEq for GrammarError<'a>