main.zig

const std = @import("std");
const testing = std.testing;

const Reader = struct {
    reader: anytype,
    seekableStream: anytype,
};

const Node = struct {
    value: isize,
};

const Parser = struct {
    run: fn(src: *Reader) ?Node,
};

fn literal(s: []const u8) Parser {
    return struct {
        pub const parser = Parser{.run = run};

        fn run(src: *Reader) !?Node {
            const b = try src.reader.readByte();
            std.debug.print("efg{s}\n", b);
            return Node{.value = 2};
        }
    }.parser;
}

test "basic" {
    const x = literal("foobar");
}

zig build test

Assertion failed at /Users/runner/work/1/s/src/stage1/analyze.cpp:618 in get_pointer_to_type_extra2. This is a bug in the Zig compiler.The following command terminated unexpectedly:
/usr/local/bin/zig test /Users/slimsag/Desktop/hexops/zorex/src/main.zig --cache-dir /Users/slimsag/Desktop/hexops/zorex/zig-cache --global-cache-dir /Users/slimsag/.cache/zig --name test 
error: the following build command failed with exit code 1:
/Users/slimsag/Desktop/hexops/zorex/zig-cache/o/4c9b225345d60ec9a2b8330ba28221e7/build /usr/local/bin/zig /Users/slimsag/Desktop/hexops/zorex /Users/slimsag/Desktop/hexops/zorex/zig-cache /Users/slimsag/.cache/zig test

zig version

0.8.0-dev.1146+a448210fc