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method Decoder.readF64

Reads a floating point number.

Example:

oxl✓ checked in CI
use std.ser { Codec, Encoder, Decoder, Schema, encode, decode, hex, EncodeError, DecodeError }

data Real {}

impl Codec<f64> for Real {
  static fn encode(x: &f64, w: &var Encoder) -> () | EncodeError { w.writeF64(x) }
  static fn decode(r: &var Decoder) -> f64 | DecodeError { r.readF64() }
  static fn schema() -> Schema => Schema.of("double")
}

data Wrap {
  @codec(Real) n: f64
}

fn main() io {
  let b = encode(&Wrap{ n: 2.5 })!
  print("{decode<Wrap>(&b)!.n}")
}
Output
2.5
var fn readF64() -> f64 | DecodeError

Since. 1.0.0-beta

Returns

f64

Errors

  • DecodeError @error
  • `DecodeError.Malformed` when the next value is not a number.

Effects

none declared (pure unless the body says otherwise)

Defined in: std/ser/ser.oxl:1577

See also