Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/EnumTemplate.kt b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/EnumTemplate.kt
new file mode 100644
index 0000000000..d4c4a1684a
--- /dev/null
+++ b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/EnumTemplate.kt
@@ -0,0 +1,110 @@
+{#
+// 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() %}
+
+enum class {{ type_name }} {
+    {% for variant in e.variants() -%}
+    {{ variant|variant_name }}{% if loop.last %};{% else %},{% endif %}
+    {%- endfor %}
+    companion object
+}
+
+public object {{ e|ffi_converter_name }}: FfiConverterRustBuffer<{{ type_name }}> {
+    override fun read(buf: ByteBuffer) = try {
+        {{ type_name }}.values()[buf.getInt() - 1]
+    } catch (e: IndexOutOfBoundsException) {
+        throw RuntimeException("invalid enum value, something is very wrong!!", e)
+    }
+
+    override fun allocationSize(value: {{ type_name }}) = 4
+
+    override fun write(value: {{ type_name }}, buf: ByteBuffer) {
+        buf.putInt(value.ordinal + 1)
+    }
+}
+
+{% else %}
+
+sealed class {{ type_name }}{% if contains_object_references %}: Disposable {% endif %} {
+    {% for variant in e.variants() -%}
+    {% if !variant.has_fields() -%}
+    object {{ variant|type_name(ci) }} : {{ type_name }}()
+    {% else -%}
+    data class {{ variant|type_name(ci) }}(
+        {% for field in variant.fields() -%}
+        val {{ field.name()|var_name }}: {{ 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
+}
+
+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
+            (
+                4
+                {%- for field in variant.fields() %}
+                + {{ field|allocation_size_fn }}(value.{{ field.name()|var_name }})
+                {%- 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.{{ field.name()|var_name }}, buf)
+                {%- endfor %}
+                Unit
+            }
+            {%- endfor %}
+        }.let { /* this makes the `when` an expression, which ensures it is exhaustive */ }
+    }
+}
+
+{% endif %}