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lits

template <typename C = char, typename T = C> struct lits;

lits represents a sequence of literals to match an input to satisfy a part of a production rule.

lits has the same API as std::vector<lit<C, T>>. As an addition it has a Boolean neg attribute.

attribute

bool neg;

neg states if the sequence is negated or not.

Negated literal sequence satisfies a part of a production rule if it does not match the input.

constructors

Use std::vector constructor.

lits empty,
    hello = { lit('h'), lit('e'), lit('l'), lit('l'), lit('o') },
    hello_copy1(hello.begin(), hello.end()),
    hello_copy2(hello),
    etc(3, lit('.'));

methods

Use std::vector methods.

Additionally there is a negation operator.

lits<C, T> operator~(const lits<C, T>& x);

Negates the literal sequence.

lits nl = { lit('\n') },
    not_nl = ~nl;