Function default_init

crates/codegen/src/csharp.rs:1290–1319

(ctx: &TypespaceForGenerate, ty: &AlgebraicTypeUse)

}

fn default_init(ctx: &TypespaceForGenerate, ty: &AlgebraicTypeUse) -> Option<&'static str> {
    match ty {
        // Options (`T?`) have a default value of null which is fine for us.
        AlgebraicTypeUse::Option(_) => None,
        AlgebraicTypeUse::Ref(r) => match &ctx[*r] {
            // TODO: generate some proper default here (what would it be for tagged enums?).
            AlgebraicTypeDef::Sum(_) => Some("null!"),
            // Simple enums have their own default (variant with value of zero).
            AlgebraicTypeDef::PlainEnum(_) => None,
            AlgebraicTypeDef::Product(_) => Some("new()"),
        },
        // See Sum(_) handling above.
        AlgebraicTypeUse::ScheduleAt => Some("null!"),
        AlgebraicTypeUse::Array(_) => Some("new()"),
        // Strings must have explicit default value of "".
        AlgebraicTypeUse::String => Some(r#""""#),
        // Primitives are initialized to zero automatically.
        AlgebraicTypeUse::Primitive(_) => None,
        // Result<,> must be explicitly initialized.
        AlgebraicTypeUse::Result { .. } => Some("default!"),
        // these are structs, they are initialized to zero-filled automatically
        AlgebraicTypeUse::Unit
        | AlgebraicTypeUse::Identity
        | AlgebraicTypeUse::ConnectionId
        | AlgebraicTypeUse::Timestamp
        | AlgebraicTypeUse::TimeDuration
        | AlgebraicTypeUse::Uuid => None,
        AlgebraicTypeUse::Never => unimplemented!("never types are not yet supported in C# output"),
    }
}

struct CsharpAutogen {
    output: CodeIndenter<String>,