From 5c25984ea01677eb759501a5cff3fa63d2d460d8 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Tue, 14 Apr 2015 21:45:37 +0900
Subject: Fix Unicode case handling (#186)

---
 src/pattern.go | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'src/pattern.go')

diff --git a/src/pattern.go b/src/pattern.go
index fbb70c5f..e6bda5f3 100644
--- a/src/pattern.go
+++ b/src/pattern.go
@@ -4,12 +4,11 @@ import (
 	"regexp"
 	"sort"
 	"strings"
+	"unicode"
 
 	"github.com/junegunn/fzf/src/algo"
 )
 
-const uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-
 // fuzzy
 // 'exact
 // ^exact-prefix
@@ -91,7 +90,14 @@ func BuildPattern(mode Mode, caseMode Case,
 
 	switch caseMode {
 	case CaseSmart:
-		if !strings.ContainsAny(asString, uppercaseLetters) {
+		hasUppercase := false
+		for _, r := range runes {
+			if unicode.IsUpper(r) {
+				hasUppercase = true
+				break
+			}
+		}
+		if !hasUppercase {
 			runes, caseSensitive = []rune(strings.ToLower(asString)), false
 		}
 	case CaseIgnore:
-- 
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