const go/token.LowestPrec

4 uses

	go/token (current package)
		token.go#L258: 	LowestPrec  = 0 // non-operators
		token.go#L279: 	return LowestPrec

	go/parser
		parser.go#L1916: 	return p.parseBinaryExpr(nil, token.LowestPrec+1)
		parser.go#L2652: 				x = p.parseBinaryExpr(lhs, token.LowestPrec+1)