parser

const (
	LOWEST_PRECEDENCE = 0
	LOWEST            = 1
	WALRUS_EXPR       = 2 // := binds looser than everything except another :=
	CONDITIONAL       = 3 // for conditional expressions (x if cond else y)
	OR                = 4
	AND               = 5
	NOT_EXPR          = 6 // prefix `not`: tighter than and/or, looser than comparisons
	// Comparisons share one level, as in Python (==, !=, <, >, <=, >=, in,
	// is): mixed chains like a < b == c are built by parseInfixExpression.
	EQUALS      = 7
	LESSGREATER = 7
	BIT_OR      = 8
	BIT_XOR     = 9
	BIT_AND     = 10
	BIT_SHIFT   = 11
	SUM         = 12
	PRODUCT     = 13
	POWER       = 14
	PREFIX      = 15
	CALL        = 16
)