Struct Reader 

pub struct Reader { /* private fields */ }

Parses CSV data from a byte slice or a std::io::Read source.

Create an iterator over rows with Reader::rows:

let data = b"name,age\nAlice,30\nBob,25\n";
for row in Reader::new(data).rows() {
    let row = row?;
    // ...
}

Implementations

impl Reader

pub fn new(data: &[u8]) -> Self

Create a reader from a byte slice. The data is copied into an internal buffer. This constructor is available with or without the std feature.

pub fn set_delimiter(&mut self, byte: u8) -> &mut Self

Set the field delimiter byte (default is ,).

pub fn set_flexible(&mut self, yes: bool) -> &mut Self

Allow variable numbers of fields per row (default false).

pub fn rows(self) -> Rows

Read all rows from this CSV source.

Consumes the reader and returns an iterator yielding Result<Row, ReadError>.

Example

let data = b"a,b,c\n1,2,3\n";
let mut total = 0usize;
for row in Reader::new(data).rows() {
    total += row?.len();
}
assert_eq!(total, 6);

impl Reader

pub fn from_reader(reader: impl Read + 'static) -> Self

Create a reader from any std::io::Read source. Data is streamed in chunks as rows are read, without loading the entire input.

Example

let file = File::open("data.csv").unwrap();
for row in Reader::from_reader(file).rows() {
    let row = row?;
    // ...
}