make Lexer peekable without a wrapper

1 files changed, 0 insertions, 51 deletions

diff --git a/src/peek.zig b/src/peek.zig
deleted file mode 100644
index 58911e9..0000000
--- a/src/peek.zig
+++ /dev/null
@@ -1,51 +0,0 @@
-pub fn peekable(iterator: anytype) Peekable(@TypeOf(iterator)) {
-    return .{ .iterator = iterator };
-}
-
-pub fn Peekable(Iterator: type) type {
-    const ActualIterator = switch (@typeInfo(Iterator)) {
-        .pointer => |p| p.child,
-        else => Iterator,
-    };
-    const Next = @typeInfo(@TypeOf(ActualIterator.next)).@"fn";
-    const Item = switch (@typeInfo(Next.return_type.?)) {
-        .optional => |o| o.child,
-        else => |i| i,
-    };
-    return struct {
-        iterator: Iterator,
-        peeked: ?Item = null,
-
-        pub fn peek(self: *Self) ?Item {
-            if (self.peeked) |peeked| return peeked;
-            const item = self.iterator.next();
-            self.peeked = item;
-            return item;
-        }
-
-        pub fn next(self: *Self) ?Item {
-            const item = if (self.peeked) |peeked| peeked else self.iterator.next();
-            self.peeked = null;
-            return item;
-        }
-
-        const Self = @This();
-    };
-}
-
-test peekable {
-    const expect = std.testing.expect;
-    // std.meta.de
-
-    var it = std.mem.window(u8, &[_]u8{ 1, 2, 3 }, 1, 1);
-    var peek = peekable(&it);
-    try expect(peek.next().?[0] == 1);
-    try expect(peek.peek().?[0] == 2);
-    try expect(peek.peek().?[0] == 2);
-    try expect(peek.next().?[0] == 2);
-    try expect(peek.next().?[0] == 3);
-    try expect(peek.peek() == null);
-    try expect(peek.next() == null);
-}
-
-const std = @import("std");