macros.py - mozsearch

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{#

// Template to call into rust. Used in several places.

// Variable names in `arg_list_decl` should match up with arg lists

// passed to rust via `arg_list_lowered`

#}

{%- macro to_ffi_call(func) -%}

{%- call _to_ffi_call_with_prefix_arg("", func) %}

{%- endmacro -%}

{%- macro to_ffi_call_with_prefix(prefix, func) -%}

{%- call _to_ffi_call_with_prefix_arg(format!("{},", prefix), func) %}

{%- endmacro -%}

{%- macro _to_ffi_call_with_prefix_arg(prefix, func) -%}

{%- match func.throws_type() -%}

{%-     when Some with (e) -%}

{%-         match e -%}

{%-             when Type::Enum { .. } -%}

_uniffi_rust_call_with_error({{ e|ffi_converter_name }},

{%-             when Type::Object { .. } -%}

_uniffi_rust_call_with_error({{ e|ffi_converter_name }}__as_error,

{%-             else %}

# unsupported error type!

{%-         endmatch %}

{%- else -%}

_uniffi_rust_call(

{%- endmatch -%}

    _UniffiLib.{{ func.ffi_func().name() }},

    {{- prefix }}

    {%- call arg_list_lowered(func) -%}

{%- endmacro -%}

{%- macro arg_list_lowered(func) %}

    {%- for arg in func.arguments() %}

        {{ arg|lower_fn }}({{ arg.name() }})

        {%- if !loop.last %},{% endif %}

    {%- endfor %}

{%- endmacro -%}

{%- macro docstring_value(maybe_docstring, indent_spaces) %}

{%- if let Some(docstring) = maybe_docstring %}

{{ docstring|docstring(indent_spaces) }}

{{ "" }}

{%- endif %}

{%- endmacro %}

{%- macro docstring(defn, indent_spaces) %}

{%- call docstring_value(defn.docstring(), indent_spaces) %}

{%- endmacro %}

{#-

// Arglist as used in Python declarations of methods, functions and constructors.

// Note the type_name filters.

-#}

{% macro arg_list_decl(func) %}

    {%- for arg in func.arguments() -%}

        {{ arg.name() }}

        {%- match arg.default_value() %}

        {%- when Some with(literal) %}: "typing.Union[object, {{ arg|type_name -}}]" = _DEFAULT

        {%- else %}: "{{ arg|type_name -}}"

        {%- endmatch %}

        {%- if !loop.last %},{% endif -%}

    {%- endfor %}

{%- endmacro %}

{#-

// Arglist as used in the _UniffiLib function declarations.

// Note unfiltered name but ffi_type_name filters.

-#}

{%- macro arg_list_ffi_decl(func) %}

    {%- for arg in func.arguments() %}

    {{ arg.type_().borrow()|ffi_type_name(ci) }},

    {%- endfor %}

    {%- if func.has_rust_call_status_arg() %}

    ctypes.POINTER(_UniffiRustCallStatus),{% endif %}

{% endmacro -%}

{#

 # Setup function arguments by initializing default values.

#}

{%- macro setup_args(func) %}

    {%- for arg in func.arguments() %}

    {%- if let Some(literal) = arg.default_value() %}

    if {{ arg.name() }} is _DEFAULT:

        {{ arg.name() }} = {{ literal|literal_py(arg.as_type().borrow()) }}

    {%- endif %}

    {{ arg|check_lower_fn }}({{ arg.name() }})

    {% endfor -%}

{%- endmacro -%}

{#

 # Exactly the same thing as `setup_args()` but with an extra 4 spaces of

 # indent so that it works with object methods.

#}

{%- macro setup_args_extra_indent(func) %}

        {%- for arg in func.arguments() %}

        {%- if let Some(literal) = arg.default_value() %}

        if {{ arg.name() }} is _DEFAULT:

            {{ arg.name() }} = {{ literal|literal_py(arg.as_type().borrow()) }}

        {%- endif %}

        {{ arg|check_lower_fn }}({{ arg.name() }})

        {% endfor -%}

{%- endmacro -%}

{#

 # Macro to call methods

#}

{%- macro method_decl(py_method_name, meth) %}

{%  if meth.is_async() %}

{%-     match meth.return_type() %}

{%-         when Some(return_type) %}

    async def {{ py_method_name }}(self, {% call arg_list_decl(meth) %}) -> "{{ return_type|type_name }}":

{%-         when None %}

    async def {{ py_method_name }}(self, {% call arg_list_decl(meth) %}) -> None:

{%      endmatch %}

        {%- call docstring(meth, 8) %}

        {%- call setup_args_extra_indent(meth) %}

        return await _uniffi_rust_call_async(

            _UniffiLib.{{ meth.ffi_func().name() }}(

                self._uniffi_clone_pointer(), {% call arg_list_lowered(meth) %}

),

            _UniffiLib.{{ meth.ffi_rust_future_poll(ci) }},

            _UniffiLib.{{ meth.ffi_rust_future_complete(ci) }},

            _UniffiLib.{{ meth.ffi_rust_future_free(ci) }},

            # lift function

            {%- match meth.return_type() %}

            {%- when Some(return_type) %}

            {{ return_type|lift_fn }},

            {%- when None %}

            lambda val: None,

            {% endmatch %}

            {% call error_ffi_converter(meth) %}

{%- else -%}

{%-     match meth.return_type() %}

{%-         when Some(return_type) %}

    def {{ py_method_name }}(self, {% call arg_list_decl(meth) %}) -> "{{ return_type|type_name }}":

        {%- call docstring(meth, 8) %}

        {%- call setup_args_extra_indent(meth) %}

        return {{ return_type|lift_fn }}(

            {% call to_ffi_call_with_prefix("self._uniffi_clone_pointer()", meth) %}

{%-         when None %}

    def {{ py_method_name }}(self, {% call arg_list_decl(meth) %}) -> None:

        {%- call docstring(meth, 8) %}

        {%- call setup_args_extra_indent(meth) %}

        {% call to_ffi_call_with_prefix("self._uniffi_clone_pointer()", meth) %}

{%      endmatch %}

{%  endif %}

{% endmacro %}

{%- macro error_ffi_converter(func) %}

    # Error FFI converter

{%  match func.throws_type() %}

{%-     when Some(e) %}

{%-         match e -%}

{%-             when Type::Enum { .. } -%}

    {{ e|ffi_converter_name }},

{%-             when Type::Object { .. } -%}

    {{ e|ffi_converter_name }}__as_error,

{%-             else %}

    # unsupported error type!

{%-         endmatch %}

{%-     when None %}

    None,

{%-  endmatch %}

{% endmacro %}