01-01-read-file-line-by-line/

[giscus[bot]]

01-01-read-file-line-by-line/

https://cookbook.ziglang.cc/01-01-read-file-line-by-line/

[ItalicIntegral]

I copied this into a new project and created the file in the specified path. For some reason it enters into an infinite loop and just keeps incrementing and printing line_no.

[jiacai2050]

Do you have a reproducible demo?

[ItalicIntegral]

Not a programmer. Not sure what a demo is.
Zig Version: 0.16.0-dev.699+529aa9f27
Running Pop!-Os 24.04 LTS x86_64 COSMIC Wayland
Execute from COSMIC Terminal

It just keeps listing line numbers infinitely.

`
pub fn main() !void {
const file = try fs.cwd().openFile("tests/some-text.txt", .{});
defer file.close();

var file_buffer: [4096]u8 = undefined;
var reader = file.reader(&file_buffer);
var line_no: usize = 0;
while (reader.interface.takeDelimiterExclusive('\n')) |line| {
    line_no += 1;
    print("{d}--{s}\n", .{ line_no, line });
} else |err| switch (err) {
    error.EndOfStream => {}, // Normal termination
    else => return err, // Propagate error
}

print("Total lines: {d}\n", .{line_no});

}
`

[jiacai2050]

Hi, that's already fixed in #117. It's a breaking changes introduced in Zig 0.15.2.

[rlewicki]

Hi, it seems that version 0.16 has changed the API as the file.reader takes two parameters rather than one.

See the documentation here: https://ziglang.org/documentation/master/std/#std.fs.File.reader

It expected the Io as the first parameter.

[jiacai2050]

We are currently tracking the 0.15.x branch. Once version 0.16 is officially tagged, we plan to adopt it.