DelimitersCounter Class

Brief: a basic facility to count matching delimiters

Detailed description

The DelimitersCounter class can be used to verify proper nesting of delimiters that comes in pair; i.e. {}, () and [].

Members documentation

void reset()

Brief: resets all counters to zero

void feed(const Token& tok)

Brief: updates the counters

Parameters:

• input token

bool balanced() const

Brief: returns whether delimiters are properly balanced

bool invalid() const

Brief: returns whether the counters are in a state that makes balancing impossible

This state is reached when a closing delimiter is encountered before its matching opening delimiter; e.g. “)[])”