25 lines
461 B
Go
25 lines
461 B
Go
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package underline
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import (
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"fmt"
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"regexp"
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"strings"
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)
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type export string
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var Export = export("underline")
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func (syn export) Regex() *regexp.Regexp {
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return regexp.MustCompile(`(?m)_([^_]+)_`)
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}
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func (syn export) Transform(args ...string) (string, error) {
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// no arg, empty -> ignore
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if len(args) < 1 || len(args[0]) < 1 {
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return "", nil
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}
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return fmt.Sprintf("\x1b[4m%s\x1b[24m", strings.Replace(args[0], "\x1b[0m", "\x1b[0m\x1b[4m", -1)), nil
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}
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