package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^@ heading2$[\s\S]*?^(?:field2: \"?((?<=\")[^"\\]*(?:\\.[^"\\]*)*(?=\"$)|(?<!\").*(?!\")$)\"?$|)?$[\s\S]*?(?=@ [^\s]*?|\Z)`)
var str = `@ heading1
field1: "single-line strings are quoted only sometimes."
field2: "strings that span
multiple lines
are always quoted."
field3: this single-line string is unquoted.
@ heading2
field1: field names can be repeated among headings.
field2: "Regex is harder when I add an
@ in a multi-line string, or if I add
backslash-escaped characters like \" and \'.
What happens if I have an empty line in a string?
Also,
[this line]
isn't actually a section."
field3: this field comes after field2
[sectionname]
field1: the same field name under a different section.
[anothersection]
field1: a second section under the same heading
field4: field number four
@ heading3
field1: value value value value value
field2: "quoted string
quoted string
quoted string"
unique: unique field name`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/