1 files changed, 28 insertions, 0 deletions
diff --git a/src/string_immutable.zig b/src/string_immutable.zig
new file mode 100644
index 000000000..7613509c0
--- /dev/null
+++ b/src/string_immutable.zig
@@ -0,0 +1,28 @@
+const std = @import("std");
+const expect = std.testing.expect;
+
+usingnamespace @import("string_types.zig");
+
+pub fn containsChar(self: string, char: u8) bool {
+    return std.mem(char) != null;
+}
+
+pub fn indexOfChar(self: string, char: u8) ?usize {
+    return std.mem.indexOfScalar(@TypeOf(char), self, char);
+}
+
+pub fn lastIndexOfChar(self: string, char: u8) ?usize {
+    return std.mem.lastIndexOfScalar(u8, self, char);
+}
+
+pub fn lastIndexOf(self: string, str: u8) ?usize {
+    return std.mem.lastIndexOf(u8, self, str);
+}
+
+pub fn indexOf(self: string, str: u8) ?usize {
+    return std.mem.indexOf(u8, self, str);
+}
+
+pub fn eql(self: string, other: anytype) bool {
+    return std.mem.eql(u8, self, other);
+}