Function findallVariables

hrp/parser.go:522–568

(raw string)

}

func findallVariables(raw string) variableSet {
	matchStartPosition := 0
	remainedString := raw
	varSet := make(variableSet)

	for matchStartPosition < len(raw) {
		// locate $ char position
		startPosition := strings.Index(remainedString, "$")
		if startPosition == -1 { // no $ found
			return varSet
		}

		// found $, check if variable or function
		matchStartPosition += startPosition
		remainedString = remainedString[startPosition:]

		// Notice: notation priority
		// $$ > $var

		// search $$, use $$ to escape $ notation
		if strings.HasPrefix(remainedString, "$$") { // found $$
			matchStartPosition += 2
			remainedString = remainedString[2:]
			continue
		}

		// search variable like ${var} or $var
		varMatched := regexCompileVariable.FindStringSubmatch(remainedString)
		if len(varMatched) == 3 {
			var varName string
			if varMatched[1] != "" {
				varName = varMatched[1] // match ${var}
			} else {
				varName = varMatched[2] // match $var
			}
			varSet[varName] = struct{}{}

			matchStartPosition += len(varMatched[0])
			remainedString = raw[matchStartPosition:]
			continue
		}

		break
	}

	return varSet
}