qubit_value/value/
value_getter.rs

1/*******************************************************************************
2 *
3 *    Copyright (c) 2025 - 2026 Haixing Hu.
4 *
5 *    SPDX-License-Identifier: Apache-2.0
6 *
7 *    Licensed under the Apache License, Version 2.0.
8 *
9 ******************************************************************************/
10
11//! `TryFrom<&Value>` implementations for strict typed reads.
12
13use std::collections::HashMap;
14use std::time::Duration;
15
16use bigdecimal::BigDecimal;
17use chrono::{
18    DateTime,
19    NaiveDate,
20    NaiveDateTime,
21    NaiveTime,
22    Utc,
23};
24use num_bigint::BigInt;
25use url::Url;
26
27use super::value::Value;
28use crate::value_error::{
29    ValueError,
30    ValueResult,
31};
32
33macro_rules! impl_value_try_from_ref {
34    ($type:ty, $method:ident) => {
35        impl TryFrom<&Value> for $type {
36            type Error = ValueError;
37
38            #[inline]
39            fn try_from(value: &Value) -> ValueResult<$type> {
40                value.$method()
41            }
42        }
43    };
44}
45
46// Primitive and common value types
47impl_value_try_from_ref!(bool, get_bool);
48impl_value_try_from_ref!(char, get_char);
49impl_value_try_from_ref!(i8, get_int8);
50impl_value_try_from_ref!(i16, get_int16);
51impl_value_try_from_ref!(i32, get_int32);
52impl_value_try_from_ref!(i64, get_int64);
53impl_value_try_from_ref!(i128, get_int128);
54impl_value_try_from_ref!(u8, get_uint8);
55impl_value_try_from_ref!(u16, get_uint16);
56impl_value_try_from_ref!(u32, get_uint32);
57impl_value_try_from_ref!(u64, get_uint64);
58impl_value_try_from_ref!(u128, get_uint128);
59impl_value_try_from_ref!(f32, get_float32);
60impl_value_try_from_ref!(f64, get_float64);
61impl_value_try_from_ref!(NaiveDate, get_date);
62impl_value_try_from_ref!(NaiveTime, get_time);
63impl_value_try_from_ref!(NaiveDateTime, get_datetime);
64impl_value_try_from_ref!(DateTime<Utc>, get_instant);
65impl_value_try_from_ref!(BigInt, get_biginteger);
66impl_value_try_from_ref!(BigDecimal, get_bigdecimal);
67impl_value_try_from_ref!(isize, get_intsize);
68impl_value_try_from_ref!(usize, get_uintsize);
69impl_value_try_from_ref!(Duration, get_duration);
70impl_value_try_from_ref!(Url, get_url);
71impl_value_try_from_ref!(HashMap<String, String>, get_string_map);
72impl_value_try_from_ref!(serde_json::Value, get_json);
73
74/// String specialization because `Value::get_string()` returns `&str`.
75impl TryFrom<&Value> for String {
76    type Error = ValueError;
77
78    #[inline]
79    fn try_from(value: &Value) -> ValueResult<String> {
80        value.get_string().map(|s| s.to_string())
81    }
82}
qubit_value/value/value_getter.rs

qubit_value/value/
value_getter.rs
