34 lines
970 B
Rust
34 lines
970 B
Rust
use crate::{Result, ScalarType, Value};
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use async_graphql_derive::Scalar;
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macro_rules! impl_float_scalars {
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($($ty:ty),*) => {
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$(
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#[Scalar(internal)]
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impl ScalarType for $ty {
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fn type_name() -> &'static str {
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"Float"
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}
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fn description() -> Option<&'static str> {
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Some("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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}
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fn parse(value: &Value) -> Option<Self> {
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match value {
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Value::Int(n) => Some(*n as Self),
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Value::Float(n) => Some(*n as Self),
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_ => None
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}
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}
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fn to_json(&self) -> Result<serde_json::Value> {
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Ok((*self).into())
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}
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}
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)*
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};
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}
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impl_float_scalars!(f32, f64);
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