英文:
What is the difference between a regular expression quoted by ` and "?
问题
为什么 C:\\（由 ` 引用）[tag:regexp] 不能匹配 "C:\\" 和 "C:\\\\"？
r, err := regexp.Compile(`C:\\\\`) // 不匹配
r, err := regexp.Compile("C:\\\\") // 匹配
if r.MatchString("Working on drive C:\\") == true {
fmt.Printf("匹配。")
} else {
fmt.Printf("不匹配。")
}
英文:
Why the C:\\\\ (quoted by `) [tag:regexp] does not match "C:\\" and "C:\\\\" do ?
r, err := regexp.Compile(`C:\\\\`) // Not match
r, err := regexp.Compile("C:\\\\") // Matches
if r.MatchString("Working on drive C:\\") == true {
fmt.Printf("Matches.")
} else {
fmt.Printf("No match.")
}
答案1
得分: 8
原始字符串字面值中的转义序列（由引号引起来）不会被解释。
`C:\\\\`
等同于：
"C:\\\\\\\\"
英文:
Escape sequences in raw string literal (quoted by quotes) are not interpreted.
`C:\\\\`
is equivalent to:
"C:\\\\\\\\"
See The Go Programming Language Specification - String literals.
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