operator <= method
Returns true if this precedence represents a looser, or equal, binding
than other; that is, parsing ambiguities will be resolved in favor of
nesting the pattern having precedence other within the pattern
having precedence this, or, if the precedences are equal, parsing
ambiguities will be resolved according to the associativity of the
pattern precedence.
Implementation
bool operator <=(PatternPrecedence other) => _index <= other._index;