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method Codec.decode

Reads a value of T from the decoder r with calls of readStr, readI64, ...

Example:

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

data Shift {}

impl Codec<i64> for Shift {
  static fn encode(x: &i64, w: &var Encoder) -> () | EncodeError { w.writeI64(x + 1) }
  static fn decode(r: &var Decoder) -> i64 | DecodeError { r.readI64()? - 1 }
  static fn schema() -> Schema => Schema.of("int64")
}

data Subject {
  @codec(Shift) n: i64
}

fn main() io {
  let b = encode(&Subject{ n: 41 })!
  print("{decode<Subject>(&b)!.n}")
}
Output
41
static fn decode(r: &var Decoder) -> T | DecodeError

Since. 1.0.0-beta

Parameters

NameType
r&var Decoder

Returns

T

Errors

  • DecodeError @error
  • `DecodeError` when the input is not a valid representation.

Effects

none declared (pure unless the body says otherwise)

Defined in: std/ser/ser.oxl:307

See also