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{#
// Kotlin's `enum class` construct doesn't support variants with associated data,
// but is a little nicer for consumers than its `sealed class` enum pattern.
// So, we switch here, using `enum class` for enums with no associated data
// and `sealed class` for the general case.
#}
{%- if e.is_flat() %}
{%- call kt::docstring(e, 0) %}
{% match e.variant_discr_type() %}
{% when None %}
enum class {{ type_name }} {
{% for variant in e.variants() -%}
{%- call kt::docstring(variant, 4) %}
{{ variant|variant_name }}{% if loop.last %};{% else %},{% endif %}
{%- endfor %}
companion object
}
{% when Some with (variant_discr_type) %}
enum class {{ type_name }}(val value: {{ variant_discr_type|type_name(ci) }}) {
{% for variant in e.variants() -%}
{%- call kt::docstring(variant, 4) %}
{{ variant|variant_name }}({{ e|variant_discr_literal(loop.index0) }}){% if loop.last %};{% else %},{% endif %}
{%- endfor %}
companion object
}
{% endmatch %}
/**
* @suppress
*/
public object {{ e|ffi_converter_name }}: FfiConverterRustBuffer<{{ type_name }}> {
override fun read(buf: ByteBuffer) = try {
{% if config.use_enum_entries() %}
{{ type_name }}.entries[buf.getInt() - 1]
{% else -%}
{{ type_name }}.values()[buf.getInt() - 1]
{%- endif %}
} catch (e: IndexOutOfBoundsException) {
throw RuntimeException("invalid enum value, something is very wrong!!", e)
}
override fun allocationSize(value: {{ type_name }}) = 4UL
override fun write(value: {{ type_name }}, buf: ByteBuffer) {
buf.putInt(value.ordinal + 1)
}
}
{% else %}
{%- call kt::docstring(e, 0) %}
sealed class {{ type_name }}{% if contains_object_references %}: Disposable {% endif %} {
{% for variant in e.variants() -%}
{%- call kt::docstring(variant, 4) %}
{% if !variant.has_fields() -%}
object {{ variant|type_name(ci) }} : {{ type_name }}()
{% else -%}
data class {{ variant|type_name(ci) }}(
{%- for field in variant.fields() -%}
{%- call kt::docstring(field, 8) %}
val {% call kt::field_name(field, loop.index) %}: {{ field|type_name(ci) }}{% if loop.last %}{% else %}, {% endif %}
{%- endfor -%}
) : {{ type_name }}() {
companion object
}
{%- endif %}
{% endfor %}
{% if contains_object_references %}
@Suppress("UNNECESSARY_SAFE_CALL") // codegen is much simpler if we unconditionally emit safe calls here
override fun destroy() {
when(this) {
{%- for variant in e.variants() %}
is {{ type_name }}.{{ variant|type_name(ci) }} -> {
{%- if variant.has_fields() %}
{% call kt::destroy_fields(variant) %}
{% else -%}
// Nothing to destroy
{%- endif %}
}
{%- endfor %}
}.let { /* this makes the `when` an expression, which ensures it is exhaustive */ }
}
{% endif %}
companion object
}
/**
* @suppress
*/
public object {{ e|ffi_converter_name }} : FfiConverterRustBuffer<{{ type_name }}>{
override fun read(buf: ByteBuffer): {{ type_name }} {
return when(buf.getInt()) {
{%- for variant in e.variants() %}
{{ loop.index }} -> {{ type_name }}.{{ variant|type_name(ci) }}{% if variant.has_fields() %}(
{% for field in variant.fields() -%}
{{ field|read_fn }}(buf),
{% endfor -%}
){%- endif -%}
{%- endfor %}
else -> throw RuntimeException("invalid enum value, something is very wrong!!")
}
}
override fun allocationSize(value: {{ type_name }}) = when(value) {
{%- for variant in e.variants() %}
is {{ type_name }}.{{ variant|type_name(ci) }} -> {
// Add the size for the Int that specifies the variant plus the size needed for all fields
(
4UL
{%- for field in variant.fields() %}
+ {{ field|allocation_size_fn }}(value.{%- call kt::field_name(field, loop.index) -%})
{%- endfor %}
)
}
{%- endfor %}
}
override fun write(value: {{ type_name }}, buf: ByteBuffer) {
when(value) {
{%- for variant in e.variants() %}
is {{ type_name }}.{{ variant|type_name(ci) }} -> {
buf.putInt({{ loop.index }})
{%- for field in variant.fields() %}
{{ field|write_fn }}(value.{%- call kt::field_name(field, loop.index) -%}, buf)
{%- endfor %}
Unit
}
{%- endfor %}
}.let { /* this makes the `when` an expression, which ensures it is exhaustive */ }
}
}
{% endif %}