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test(examples): add examples
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29
examples/basic.rs
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29
examples/basic.rs
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use serde::Deserialize;
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use serde_inline_default::serde_inline_default;
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use serde_json::json;
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#[serde_inline_default]
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#[derive(Deserialize)]
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struct Basic {
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// if using `String` you have to call `.to_string()`
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#[serde_inline_default("0.0.0.0".to_string())]
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host: String,
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// works without specifying the integer type at the end of the value (8080u16)
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#[serde_inline_default(8080)]
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port: u16,
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// expressions are working too
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#[serde_inline_default(serde_json::json!({}))]
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random_third_party_type: serde_json::Value,
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}
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fn main() -> Result<(), serde_json::Error> {
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// creating a empty json object to use the default value of all fields
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let json_object = json!({});
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let basic: Basic = serde_json::from_value(json_object)?;
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assert_eq!(basic.host, "0.0.0.0".to_string());
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assert_eq!(basic.port, 8080);
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assert_eq!(basic.random_third_party_type, json!({}));
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Ok(())
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}
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39
examples/macro_rules.rs
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39
examples/macro_rules.rs
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use serde_json::json;
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macro_rules! simple_macro {
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(struct $name:ident { $($field:ident: $type:ty $(= $default:expr)?),*$(,)? }) => {
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#[serde_inline_default::serde_inline_default]
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#[derive(serde::Deserialize)]
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struct $name {
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$(
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$(
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#[serde_inline_default($default)]
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)?
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$field: $type
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),*
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}
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}
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}
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fn main() -> Result<(), serde_json::Error> {
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// `username` and `password` must be set when deserializing as no default value is defined for
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// them. `secret` not as we're defining a default value for it
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simple_macro! {
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struct Example {
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username: String,
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password: String,
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secret: String = "verysecretsecret".to_string()
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}
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}
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let json_object = json!({
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"username": "testuser",
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"password": "testpassword"
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});
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let example: Example = serde_json::from_value(json_object)?;
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assert_eq!(example.username, "testuser");
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assert_eq!(example.password, "testpassword");
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assert_eq!(example.secret, "verysecretsecret");
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Ok(())
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}
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