45. 实现 PercentageParser

中等0

实现类型 PercentageParser<T extends string> 。根据规则 /^(\+|\-)?(\d*)?(\%)?$/ 匹配类型 T

匹配的结果由三部分组成,分别是:[正负号, 数字, 单位],如果没有匹配到,则默认是空字符串。

例如:

type PString1 = ''
type PString2 = '+85%'
type PString3 = '-85%'
type PString4 = '85%'
type PString5 = '85'

type R1 = PercentageParser<PString1> // expected to be ['', '', '']
type R2 = PercentageParser<PString2> // expected to be ["+", "85", "%"]
type R3 = PercentageParser<PString3> // expected to be ["-", "85", "%"]
type R4 = PercentageParser<PString4> // expected to be ["", "85", "%"]
type R5 = PercentageParser<PString5> // expected to be ["", "85", ""]
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