fork of https://github.com/sourcegraph/zoekt
Add lowerRegexp function.
author
Han-Wen Nienhuys
date
(Apr 26, 2016, 2:15 PM +0200)
commit
e8c0157a
e8c0157ab79d5dd52a8a4d09ccb04997e451a811
parent
bb699687
bb699687cfde94d3b9a6396d0b1e9dc65f55a6b1
+28
+18
regexp.go
+18
regexp.go
···
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"regexp/syntax"
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)
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+
func lowerRegexp(r *syntax.Regexp) *syntax.Regexp {
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newRE := *r
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switch r.Op {
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case syntax.OpLiteral, syntax.OpCharClass:
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for i, r := range newRE.Rune {
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if r >= 'A' && r <= 'Z' {
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newRE.Rune[i] = r + 'a' - 'A'
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}
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}
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default:
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for i, s := range newRE.Sub {
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newRE.Sub[i] = lowerRegexp(s)
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}
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}
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return &newRE
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}
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// regexpToQuery tries to distill a substring search query that
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// matches a superset of the regexp.
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func regexpToQuery(r *syntax.Regexp) Query {