juniper_codegen/graphql_input_object/mod.rs
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
//! Code generation for [GraphQL input objects][0].
//!
//! [0]: https://spec.graphql.org/October2021#sec-Input-Objects
pub(crate) mod derive;
use proc_macro2::TokenStream;
use quote::{format_ident, quote, ToTokens};
use syn::{
ext::IdentExt as _,
parse::{Parse, ParseStream},
parse_quote,
spanned::Spanned,
token,
};
use crate::common::{
default, filter_attrs,
parse::{
attr::{err, OptionExt as _},
ParseBufferExt as _,
},
rename, scalar, Description, SpanContainer,
};
/// Available arguments behind `#[graphql]` attribute placed on a Rust struct
/// definition, when generating code for a [GraphQL input object][0].
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[derive(Debug, Default)]
struct ContainerAttr {
/// Explicitly specified name of this [GraphQL input object][0].
///
/// If [`None`], then Rust struct name will be used by default.
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
name: Option<SpanContainer<String>>,
/// Explicitly specified [description][2] of this [GraphQL input object][0].
///
/// If [`None`], then Rust doc comment will be used as the [description][2],
/// if any.
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
/// [2]: https://spec.graphql.org/October2021#sec-Descriptions
description: Option<SpanContainer<Description>>,
/// Explicitly specified type of [`Context`] to use for resolving this
/// [GraphQL input object][0] type with.
///
/// If [`None`], then unit type `()` is assumed as a type of [`Context`].
///
/// [`Context`]: juniper::Context
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
context: Option<SpanContainer<syn::Type>>,
/// Explicitly specified type (or type parameter with its bounds) of
/// [`ScalarValue`] to use for resolving this [GraphQL input object][0] type
/// with.
///
/// If [`None`], then generated code will be generic over any
/// [`ScalarValue`] type.
///
/// [`GraphQLType`]: juniper::GraphQLType
/// [`ScalarValue`]: juniper::ScalarValue
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
scalar: Option<SpanContainer<scalar::AttrValue>>,
/// Explicitly specified [`rename::Policy`] for all fields of this
/// [GraphQL input object][0].
///
/// If [`None`], then the [`rename::Policy::CamelCase`] will be applied by
/// default.
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
rename_fields: Option<SpanContainer<rename::Policy>>,
/// Indicator whether the generated code is intended to be used only inside
/// the [`juniper`] library.
is_internal: bool,
}
impl Parse for ContainerAttr {
fn parse(input: ParseStream<'_>) -> syn::Result<Self> {
let mut out = Self::default();
while !input.is_empty() {
let ident = input.parse_any_ident()?;
match ident.to_string().as_str() {
"name" => {
input.parse::<token::Eq>()?;
let name = input.parse::<syn::LitStr>()?;
out.name
.replace(SpanContainer::new(
ident.span(),
Some(name.span()),
name.value(),
))
.none_or_else(|_| err::dup_arg(&ident))?
}
"desc" | "description" => {
input.parse::<token::Eq>()?;
let desc = input.parse::<Description>()?;
out.description
.replace(SpanContainer::new(ident.span(), Some(desc.span()), desc))
.none_or_else(|_| err::dup_arg(&ident))?
}
"ctx" | "context" | "Context" => {
input.parse::<token::Eq>()?;
let ctx = input.parse::<syn::Type>()?;
out.context
.replace(SpanContainer::new(ident.span(), Some(ctx.span()), ctx))
.none_or_else(|_| err::dup_arg(&ident))?
}
"scalar" | "Scalar" | "ScalarValue" => {
input.parse::<token::Eq>()?;
let scl = input.parse::<scalar::AttrValue>()?;
out.scalar
.replace(SpanContainer::new(ident.span(), Some(scl.span()), scl))
.none_or_else(|_| err::dup_arg(&ident))?
}
"rename_all" => {
input.parse::<token::Eq>()?;
let val = input.parse::<syn::LitStr>()?;
out.rename_fields
.replace(SpanContainer::new(
ident.span(),
Some(val.span()),
val.try_into()?,
))
.none_or_else(|_| err::dup_arg(&ident))?;
}
"internal" => {
out.is_internal = true;
}
name => {
return Err(err::unknown_arg(&ident, name));
}
}
input.try_parse::<token::Comma>()?;
}
Ok(out)
}
}
impl ContainerAttr {
/// Tries to merge two [`ContainerAttr`]s into a single one, reporting about
/// duplicates, if any.
fn try_merge(self, mut another: Self) -> syn::Result<Self> {
Ok(Self {
name: try_merge_opt!(name: self, another),
description: try_merge_opt!(description: self, another),
context: try_merge_opt!(context: self, another),
scalar: try_merge_opt!(scalar: self, another),
rename_fields: try_merge_opt!(rename_fields: self, another),
is_internal: self.is_internal || another.is_internal,
})
}
/// Parses [`ContainerAttr`] from the given multiple `name`d
/// [`syn::Attribute`]s placed on a struct or impl block definition.
pub(crate) fn from_attrs(name: &str, attrs: &[syn::Attribute]) -> syn::Result<Self> {
let mut attr = filter_attrs(name, attrs)
.map(|attr| attr.parse_args())
.try_fold(Self::default(), |prev, curr| prev.try_merge(curr?))?;
if attr.description.is_none() {
attr.description = Description::parse_from_doc_attrs(attrs)?;
}
Ok(attr)
}
}
/// Available arguments behind `#[graphql]` attribute when generating code for
/// [GraphQL input object][0]'s [field][1].
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
/// [1]: https://spec.graphql.org/October2021#InputFieldsDefinition
#[derive(Debug, Default)]
struct FieldAttr {
/// Explicitly specified name of this [GraphQL input object field][1].
///
/// If [`None`], then Rust struct field name will be used by default.
///
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
name: Option<SpanContainer<String>>,
/// Explicitly specified [default value][2] of this
/// [GraphQL input object field][1] to be used used in case a field value is
/// not provided.
///
/// If [`None`], the this [field][1] will have no [default value][2].
///
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
/// [2]: https://spec.graphql.org/October2021#DefaultValue
default: Option<SpanContainer<default::Value>>,
/// Explicitly specified [description][2] of this
/// [GraphQL input object field][1].
///
/// If [`None`], then Rust doc comment will be used as the [description][2],
/// if any.
///
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
/// [2]: https://spec.graphql.org/October2021#sec-Descriptions
description: Option<SpanContainer<Description>>,
/// Explicitly specified marker for the Rust struct field to be ignored and
/// not included into the code generated for a [GraphQL input object][0]
/// implementation.
///
/// Ignored Rust struct fields still consider the [`default`] attribute's
/// argument.
///
/// [`default`]: Self::default
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
ignore: Option<SpanContainer<syn::Ident>>,
}
impl Parse for FieldAttr {
fn parse(input: ParseStream<'_>) -> syn::Result<Self> {
let mut out = Self::default();
while !input.is_empty() {
let ident = input.parse_any_ident()?;
match ident.to_string().as_str() {
"name" => {
input.parse::<token::Eq>()?;
let name = input.parse::<syn::LitStr>()?;
out.name
.replace(SpanContainer::new(
ident.span(),
Some(name.span()),
name.value(),
))
.none_or_else(|_| err::dup_arg(&ident))?
}
"default" => {
let val = input.parse::<default::Value>()?;
out.default
.replace(SpanContainer::new(ident.span(), Some(val.span()), val))
.none_or_else(|_| err::dup_arg(&ident))?
}
"desc" | "description" => {
input.parse::<token::Eq>()?;
let desc = input.parse::<Description>()?;
out.description
.replace(SpanContainer::new(ident.span(), Some(desc.span()), desc))
.none_or_else(|_| err::dup_arg(&ident))?
}
"ignore" | "skip" => out
.ignore
.replace(SpanContainer::new(ident.span(), None, ident.clone()))
.none_or_else(|_| err::dup_arg(&ident))?,
name => {
return Err(err::unknown_arg(&ident, name));
}
}
input.try_parse::<token::Comma>()?;
}
Ok(out)
}
}
impl FieldAttr {
/// Tries to merge two [`FieldAttr`]s into a single one, reporting about
/// duplicates, if any.
fn try_merge(self, mut another: Self) -> syn::Result<Self> {
Ok(Self {
name: try_merge_opt!(name: self, another),
default: try_merge_opt!(default: self, another),
description: try_merge_opt!(description: self, another),
ignore: try_merge_opt!(ignore: self, another),
})
}
/// Parses [`FieldAttr`] from the given multiple `name`d [`syn::Attribute`]s
/// placed on a trait definition.
fn from_attrs(name: &str, attrs: &[syn::Attribute]) -> syn::Result<Self> {
let mut attr = filter_attrs(name, attrs)
.map(|attr| attr.parse_args())
.try_fold(Self::default(), |prev, curr| prev.try_merge(curr?))?;
if attr.description.is_none() {
attr.description = Description::parse_from_doc_attrs(attrs)?;
}
Ok(attr)
}
}
/// Representation of a [GraphQL input object field][1] for code generation.
///
/// [1]: https://spec.graphql.org/October2021#InputFieldsDefinition
#[derive(Debug)]
struct FieldDefinition {
/// [`Ident`] of the Rust struct field behind this
/// [GraphQL input object field][1].
///
/// [`Ident`]: syn::Ident
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
ident: syn::Ident,
/// Rust type that this [GraphQL input object field][1] is represented with.
///
/// It should contain all its generics, if any.
///
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
ty: syn::Type,
/// [Default value][2] of this [GraphQL input object field][1] to be used in
/// case a [field][1] value is not provided.
///
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
/// [2]: https://spec.graphql.org/October2021#DefaultValue
default: Option<default::Value>,
/// Name of this [GraphQL input object field][1] in GraphQL schema.
///
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
name: Box<str>,
/// [Description][2] of this [GraphQL input object field][1] to put into
/// GraphQL schema.
///
/// [1]: https://spec.graphql.org/October2021#InputValueDefinition
/// [2]: https://spec.graphql.org/October2021#sec-Descriptions
description: Option<Description>,
/// Indicator whether the Rust struct field behinds this
/// [GraphQL input object field][1] is being ignored and should not be
/// included into the generated code.
///
/// Ignored Rust struct fields still consider the [`default`] attribute's
/// argument.
///
/// [`default`]: Self::default
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
ignored: bool,
}
/// Representation of [GraphQL input object][0] for code generation.
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[derive(Debug)]
struct Definition {
/// [`Ident`] of the Rust struct behind this [GraphQL input object][0].
///
/// [`Ident`]: syn::Ident
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
ident: syn::Ident,
/// [`Generics`] of the Rust enum behind this [GraphQL input object][0].
///
/// [`Generics`]: syn::Generics
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
generics: syn::Generics,
/// Name of this [GraphQL input object][0] in GraphQL schema.
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
name: Box<str>,
/// [Description][2] of this [GraphQL input object][0] to put into GraphQL
/// schema.
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
/// [2]: https://spec.graphql.org/October2021#sec-Descriptions
description: Option<Description>,
/// Rust type of [`Context`] to generate [`GraphQLType`] implementation with
/// for this [GraphQL input object][0].
///
/// [`GraphQLType`]: juniper::GraphQLType
/// [`Context`]: juniper::Context
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
context: syn::Type,
/// [`ScalarValue`] parametrization to generate [`GraphQLType`]
/// implementation with for this [GraphQL input object][0].
///
/// [`GraphQLType`]: juniper::GraphQLType
/// [`ScalarValue`]: juniper::ScalarValue
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
scalar: scalar::Type,
/// [Fields][1] of this [GraphQL input object][0].
///
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
/// [1]: https://spec.graphql.org/October2021#InputFieldsDefinition
fields: Vec<FieldDefinition>,
}
impl ToTokens for Definition {
fn to_tokens(&self, into: &mut TokenStream) {
self.impl_input_type_tokens().to_tokens(into);
self.impl_graphql_type_tokens().to_tokens(into);
self.impl_graphql_value_tokens().to_tokens(into);
self.impl_graphql_value_async_tokens().to_tokens(into);
self.impl_from_input_value_tokens().to_tokens(into);
self.impl_to_input_value_tokens().to_tokens(into);
self.impl_reflection_traits_tokens().to_tokens(into);
}
}
impl Definition {
/// Returns generated code implementing [`marker::IsInputType`] trait for
/// this [GraphQL input object][0].
///
/// [`marker::IsInputType`]: juniper::marker::IsInputType
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[must_use]
fn impl_input_type_tokens(&self) -> TokenStream {
let ident = &self.ident;
let scalar = &self.scalar;
let generics = self.impl_generics(false);
let (impl_generics, _, where_clause) = generics.split_for_impl();
let (_, ty_generics, _) = self.generics.split_for_impl();
let assert_fields_input_values = self.fields.iter().filter_map(|f| {
let ty = &f.ty;
(!f.ignored).then(|| {
quote! {
<#ty as ::juniper::marker::IsInputType<#scalar>>::mark();
}
})
});
quote! {
#[automatically_derived]
impl #impl_generics ::juniper::marker::IsInputType<#scalar>
for #ident #ty_generics
#where_clause
{
fn mark() {
#( #assert_fields_input_values )*
}
}
}
}
/// Returns generated code implementing [`GraphQLType`] trait for this
/// [GraphQL input object][0].
///
/// [`GraphQLType`]: juniper::GraphQLType
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[must_use]
fn impl_graphql_type_tokens(&self) -> TokenStream {
let ident = &self.ident;
let scalar = &self.scalar;
let name = &self.name;
let generics = self.impl_generics(false);
let (impl_generics, _, where_clause) = generics.split_for_impl();
let (_, ty_generics, _) = self.generics.split_for_impl();
let description = &self.description;
let fields = self.fields.iter().filter_map(|f| {
let ty = &f.ty;
let name = &f.name;
(!f.ignored).then(|| {
let arg = if let Some(default) = &f.default {
quote! { .arg_with_default::<#ty>(#name, &#default, info) }
} else {
quote! { .arg::<#ty>(#name, info) }
};
let description = &f.description;
quote! { registry #arg #description }
})
});
quote! {
#[automatically_derived]
impl #impl_generics ::juniper::GraphQLType<#scalar>
for #ident #ty_generics
#where_clause
{
fn name(
_: &Self::TypeInfo,
) -> ::core::option::Option<&'static ::core::primitive::str> {
::core::option::Option::Some(#name)
}
fn meta<'r>(
info: &Self::TypeInfo,
registry: &mut ::juniper::Registry<'r, #scalar>,
) -> ::juniper::meta::MetaType<'r, #scalar>
where
#scalar: 'r,
{
let fields = [#( #fields ),*];
registry
.build_input_object_type::<#ident #ty_generics>(info, &fields)
#description
.into_meta()
}
}
}
}
/// Returns generated code implementing [`GraphQLValue`] trait for this
/// [GraphQL input object][0].
///
/// [`GraphQLValue`]: juniper::GraphQLValue
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[must_use]
fn impl_graphql_value_tokens(&self) -> TokenStream {
let ident = &self.ident;
let scalar = &self.scalar;
let context = &self.context;
let generics = self.impl_generics(false);
let (impl_generics, _, where_clause) = generics.split_for_impl();
let (_, ty_generics, _) = self.generics.split_for_impl();
quote! {
#[automatically_derived]
impl #impl_generics ::juniper::GraphQLValue<#scalar>
for #ident #ty_generics
#where_clause
{
type Context = #context;
type TypeInfo = ();
fn type_name<'__i>(
&self,
info: &'__i Self::TypeInfo,
) -> ::core::option::Option<&'__i ::core::primitive::str> {
<Self as ::juniper::GraphQLType<#scalar>>::name(info)
}
}
}
}
/// Returns generated code implementing [`GraphQLValueAsync`] trait for this
/// [GraphQL input object][0].
///
/// [`GraphQLValueAsync`]: juniper::GraphQLValueAsync
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[must_use]
fn impl_graphql_value_async_tokens(&self) -> TokenStream {
let ident = &self.ident;
let scalar = &self.scalar;
let generics = self.impl_generics(true);
let (impl_generics, _, where_clause) = generics.split_for_impl();
let (_, ty_generics, _) = self.generics.split_for_impl();
quote! {
#[allow(non_snake_case)]
#[automatically_derived]
impl #impl_generics ::juniper::GraphQLValueAsync<#scalar>
for #ident #ty_generics
#where_clause {}
}
}
/// Returns generated code implementing [`FromInputValue`] trait for this
/// [GraphQL input object][0].
///
/// [`FromInputValue`]: juniper::FromInputValue
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[must_use]
fn impl_from_input_value_tokens(&self) -> TokenStream {
let ident = &self.ident;
let scalar = &self.scalar;
let generics = self.impl_generics(false);
let (impl_generics, _, where_clause) = generics.split_for_impl();
let (_, ty_generics, _) = self.generics.split_for_impl();
let fields = self.fields.iter().map(|f| {
let ident = &f.ident;
let construct = if f.ignored {
f.default.as_ref().map_or_else(
|| {
let expr = default::Value::default();
quote! { #expr }
},
|expr| quote! { #expr },
)
} else {
let name = &f.name;
let fallback = f.default.as_ref().map_or_else(
|| {
quote! {
::juniper::FromInputValue::<#scalar>::from_implicit_null()
.map_err(::juniper::IntoFieldError::into_field_error)?
}
},
|expr| quote! { #expr },
);
quote! {
match obj.get(#name) {
::core::option::Option::Some(v) => {
::juniper::FromInputValue::<#scalar>::from_input_value(v)
.map_err(::juniper::IntoFieldError::into_field_error)?
}
::core::option::Option::None => { #fallback }
}
}
};
quote! { #ident: { #construct }, }
});
quote! {
#[automatically_derived]
impl #impl_generics ::juniper::FromInputValue<#scalar>
for #ident #ty_generics
#where_clause
{
type Error = ::juniper::FieldError<#scalar>;
fn from_input_value(
value: &::juniper::InputValue<#scalar>,
) -> ::core::result::Result<Self, Self::Error> {
let obj = value
.to_object_value()
.ok_or_else(|| ::juniper::FieldError::<#scalar>::from(
::std::format!("Expected input object, found: {}", value))
)?;
::core::result::Result::Ok(#ident {
#( #fields )*
})
}
}
}
}
/// Returns generated code implementing [`ToInputValue`] trait for this
/// [GraphQL input object][0].
///
/// [`ToInputValue`]: juniper::ToInputValue
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[must_use]
fn impl_to_input_value_tokens(&self) -> TokenStream {
let ident = &self.ident;
let scalar = &self.scalar;
let generics = self.impl_generics(false);
let (impl_generics, _, where_clause) = generics.split_for_impl();
let (_, ty_generics, _) = self.generics.split_for_impl();
let fields = self.fields.iter().filter_map(|f| {
let ident = &f.ident;
let name = &f.name;
(!f.ignored).then(|| {
quote! {
(#name, ::juniper::ToInputValue::to_input_value(&self.#ident))
}
})
});
quote! {
#[automatically_derived]
impl #impl_generics ::juniper::ToInputValue<#scalar>
for #ident #ty_generics
#where_clause
{
fn to_input_value(&self) -> ::juniper::InputValue<#scalar> {
::juniper::InputValue::object(
#[allow(deprecated)]
::std::array::IntoIter::new([#( #fields ),*])
.collect()
)
}
}
}
}
/// Returns generated code implementing [`BaseType`], [`BaseSubTypes`] and
/// [`WrappedType`] traits for this [GraphQL input object][0].
///
/// [`BaseSubTypes`]: juniper::macros::reflect::BaseSubTypes
/// [`BaseType`]: juniper::macros::reflect::BaseType
/// [`WrappedType`]: juniper::macros::reflect::WrappedType
/// [0]: https://spec.graphql.org/October2021#sec-Input-Objects
#[must_use]
fn impl_reflection_traits_tokens(&self) -> TokenStream {
let ident = &self.ident;
let name = &self.name;
let scalar = &self.scalar;
let generics = self.impl_generics(false);
let (impl_generics, _, where_clause) = generics.split_for_impl();
let (_, ty_generics, _) = self.generics.split_for_impl();
quote! {
#[automatically_derived]
impl #impl_generics ::juniper::macros::reflect::BaseType<#scalar>
for #ident #ty_generics
#where_clause
{
const NAME: ::juniper::macros::reflect::Type = #name;
}
impl #impl_generics ::juniper::macros::reflect::BaseSubTypes<#scalar>
for #ident #ty_generics
#where_clause
{
const NAMES: ::juniper::macros::reflect::Types =
&[<Self as ::juniper::macros::reflect::BaseType<#scalar>>::NAME];
}
impl #impl_generics ::juniper::macros::reflect::WrappedType<#scalar>
for #ident #ty_generics
#where_clause
{
const VALUE: ::juniper::macros::reflect::WrappedValue = 1;
}
}
}
/// Returns prepared [`syn::Generics`] for [`GraphQLType`] trait (and
/// similar) implementation of this struct.
///
/// If `for_async` is `true`, then additional predicates are added to suit
/// the [`GraphQLAsyncValue`] trait (and similar) requirements.
///
/// [`GraphQLAsyncValue`]: juniper::GraphQLAsyncValue
/// [`GraphQLType`]: juniper::GraphQLType
#[must_use]
fn impl_generics(&self, for_async: bool) -> syn::Generics {
let mut generics = self.generics.clone();
let scalar = &self.scalar;
if scalar.is_implicit_generic() {
generics.params.push(parse_quote! { #scalar });
}
if scalar.is_generic() {
generics
.make_where_clause()
.predicates
.push(parse_quote! { #scalar: ::juniper::ScalarValue });
}
if let Some(bound) = scalar.bounds() {
generics.make_where_clause().predicates.push(bound);
}
if for_async {
let self_ty = if self.generics.lifetimes().next().is_some() {
// Modify lifetime names to omit "lifetime name `'a` shadows a
// lifetime name that is already in scope" error.
let mut generics = self.generics.clone();
for lt in generics.lifetimes_mut() {
let ident = lt.lifetime.ident.unraw();
lt.lifetime.ident = format_ident!("__fa__{ident}");
}
let lifetimes = generics.lifetimes().map(|lt| <.lifetime);
let ident = &self.ident;
let (_, ty_generics, _) = generics.split_for_impl();
quote! { for<#( #lifetimes ),*> #ident #ty_generics }
} else {
quote! { Self }
};
generics
.make_where_clause()
.predicates
.push(parse_quote! { #self_ty: ::core::marker::Sync });
if scalar.is_generic() {
generics
.make_where_clause()
.predicates
.push(parse_quote! { #scalar: ::core::marker::Send + ::core::marker::Sync });
}
}
generics
}
}