52 lines
1.6 KiB
Rust
52 lines
1.6 KiB
Rust
use crate::{InputValueError, InputValueResult, Number, Scalar, ScalarType, Value};
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/// The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](https://en.wikipedia.org/wiki/IEEE_floating_point).
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#[Scalar(internal, name = "Float")]
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impl ScalarType for f32 {
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fn parse(value: Value) -> InputValueResult<Self> {
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match value {
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Value::Number(n) => Ok(n
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.as_f64()
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.ok_or_else(|| InputValueError::from("Invalid number"))?
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as Self),
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_ => Err(InputValueError::expected_type(value)),
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}
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}
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fn is_valid(value: &Value) -> bool {
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matches!(value, Value::Number(_))
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}
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fn to_value(&self) -> Value {
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match Number::from_f64(*self as f64) {
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Some(n) => Value::Number(n),
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None => Value::Null,
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}
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}
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}
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/// The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](https://en.wikipedia.org/wiki/IEEE_floating_point).
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#[Scalar(internal, name = "Float")]
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impl ScalarType for f64 {
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fn parse(value: Value) -> InputValueResult<Self> {
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match value {
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Value::Number(n) => Ok(n
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.as_f64()
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.ok_or_else(|| InputValueError::from("Invalid number"))?
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as Self),
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_ => Err(InputValueError::expected_type(value)),
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}
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}
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fn is_valid(value: &Value) -> bool {
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matches!(value, Value::Number(_))
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}
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fn to_value(&self) -> Value {
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match Number::from_f64(*self as f64) {
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Some(n) => Value::Number(n),
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None => Value::Null,
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}
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}
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}
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