syntax: support brace expansions with uppercase letters

They clearly work in Bash: $ echo test{A..C} testA testB testC Updates #1042.
mvdan · Nov 14, 2023 · 86a0bc9 · 86a0bc9
1 parent 8b67386
commit 86a0bc9
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/expand/braces_test.go b/expand/braces_test.go
@@ -101,6 +101,10 @@ var braceTests = []struct {
 		litWord("a{c..f}"),
 		litWords("ac", "ad", "ae", "af"),
 	},
+	{
+		litWord("a{H..K}"),
+		litWords("aH", "aI", "aJ", "aK"),
+	},
 	{
 		litWord("a{-..f}"),
 		litWords("a{-..f}"),

diff --git a/syntax/braces.go b/syntax/braces.go
@@ -110,7 +110,8 @@ func SplitBraces(word *Word) bool {
 					val := elem.Lit()
 					if _, err := strconv.Atoi(val); err == nil {
 					} else if len(val) == 1 &&
-						'a' <= val[0] && val[0] <= 'z' {
+						(('a' <= val[0] && val[0] <= 'z') ||
+							('A' <= val[0] && val[0] <= 'Z')) {
 						chars[i] = true
 					} else {
 						broken = true