782 lines
21 KiB
Rust
782 lines
21 KiB
Rust
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#![allow(
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clippy::assertions_on_result_states,
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clippy::manual_let_else,
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clippy::too_many_lines,
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clippy::uninlined_format_args
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)]
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#[macro_use]
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mod macros;
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use quote::quote;
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use syn::{Data, DeriveInput};
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#[test]
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fn test_unit() {
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let input = quote! {
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struct Unit;
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};
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snapshot!(input as DeriveInput, @r###"
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DeriveInput {
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vis: Visibility::Inherited,
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ident: "Unit",
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generics: Generics,
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data: Data::Struct {
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fields: Fields::Unit,
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semi_token: Some,
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},
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}
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"###);
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}
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#[test]
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fn test_struct() {
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let input = quote! {
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#[derive(Debug, Clone)]
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pub struct Item {
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pub ident: Ident,
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pub attrs: Vec<Attribute>
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}
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};
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snapshot!(input as DeriveInput, @r###"
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DeriveInput {
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attrs: [
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Attribute {
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style: AttrStyle::Outer,
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meta: Meta::List {
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path: Path {
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segments: [
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PathSegment {
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ident: "derive",
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},
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],
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},
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delimiter: MacroDelimiter::Paren,
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tokens: TokenStream(`Debug , Clone`),
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},
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},
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],
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vis: Visibility::Public,
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ident: "Item",
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generics: Generics,
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data: Data::Struct {
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fields: Fields::Named {
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named: [
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Field {
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vis: Visibility::Public,
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ident: Some("ident"),
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colon_token: Some,
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ty: Type::Path {
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path: Path {
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segments: [
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PathSegment {
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ident: "Ident",
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},
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],
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},
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},
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},
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Token![,],
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Field {
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vis: Visibility::Public,
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ident: Some("attrs"),
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colon_token: Some,
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ty: Type::Path {
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path: Path {
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segments: [
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PathSegment {
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ident: "Vec",
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arguments: PathArguments::AngleBracketed {
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args: [
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GenericArgument::Type(Type::Path {
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path: Path {
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segments: [
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PathSegment {
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ident: "Attribute",
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},
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],
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},
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}),
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],
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},
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},
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],
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},
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},
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},
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],
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},
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},
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}
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"###);
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snapshot!(&input.attrs[0].meta, @r###"
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Meta::List {
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path: Path {
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segments: [
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PathSegment {
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ident: "derive",
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},
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],
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},
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delimiter: MacroDelimiter::Paren,
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tokens: TokenStream(`Debug , Clone`),
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}
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"###);
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}
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#[test]
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fn test_union() {
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let input = quote! {
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union MaybeUninit<T> {
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uninit: (),
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value: T
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}
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};
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snapshot!(input as DeriveInput, @r###"
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DeriveInput {
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vis: Visibility::Inherited,
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ident: "MaybeUninit",
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generics: Generics {
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lt_token: Some,
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params: [
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GenericParam::Type(TypeParam {
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ident: "T",
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}),
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],
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gt_token: Some,
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},
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data: Data::Union {
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fields: FieldsNamed {
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named: [
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Field {
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vis: Visibility::Inherited,
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ident: Some("uninit"),
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colon_token: Some,
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ty: Type::Tuple,
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},
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Token![,],
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Field {
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vis: Visibility::Inherited,
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ident: Some("value"),
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colon_token: Some,
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ty: Type::Path {
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path: Path {
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segments: [
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PathSegment {
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ident: "T",
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},
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],
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},
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},
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},
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],
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},
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},
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}
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"###);
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}
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#[test]
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#[cfg(feature = "full")]
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fn test_enum() {
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let input = quote! {
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/// See the std::result module documentation for details.
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#[must_use]
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pub enum Result<T, E> {
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Ok(T),
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Err(E),
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Surprise = 0isize,
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// Smuggling data into a proc_macro_derive,
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// in the style of https://github.com/dtolnay/proc-macro-hack
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ProcMacroHack = (0, "data").0
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}
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};
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snapshot!(input as DeriveInput, @r###"
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DeriveInput {
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attrs: [
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Attribute {
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style: AttrStyle::Outer,
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meta: Meta::NameValue {
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path: Path {
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segments: [
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PathSegment {
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ident: "doc",
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},
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],
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},
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value: Expr::Lit {
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lit: " See the std::result module documentation for details.",
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},
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},
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},
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Attribute {
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style: AttrStyle::Outer,
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meta: Meta::Path {
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segments: [
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PathSegment {
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ident: "must_use",
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},
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],
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},
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},
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],
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vis: Visibility::Public,
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ident: "Result",
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generics: Generics {
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lt_token: Some,
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params: [
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GenericParam::Type(TypeParam {
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ident: "T",
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}),
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Token![,],
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GenericParam::Type(TypeParam {
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ident: "E",
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}),
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],
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gt_token: Some,
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},
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data: Data::Enum {
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variants: [
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Variant {
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ident: "Ok",
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fields: Fields::Unnamed {
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unnamed: [
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Field {
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vis: Visibility::Inherited,
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ty: Type::Path {
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path: Path {
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segments: [
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PathSegment {
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ident: "T",
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},
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],
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},
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},
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},
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],
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},
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},
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Token![,],
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Variant {
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ident: "Err",
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fields: Fields::Unnamed {
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unnamed: [
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Field {
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vis: Visibility::Inherited,
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ty: Type::Path {
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path: Path {
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segments: [
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PathSegment {
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ident: "E",
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},
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],
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},
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},
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},
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],
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},
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},
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Token![,],
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Variant {
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ident: "Surprise",
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fields: Fields::Unit,
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discriminant: Some(Expr::Lit {
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lit: 0isize,
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}),
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},
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Token![,],
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Variant {
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ident: "ProcMacroHack",
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fields: Fields::Unit,
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discriminant: Some(Expr::Field {
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base: Expr::Tuple {
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elems: [
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Expr::Lit {
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lit: 0,
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},
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Token![,],
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Expr::Lit {
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lit: "data",
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},
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],
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},
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member: Member::Unnamed(Index {
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index: 0,
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}),
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}),
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},
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],
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},
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}
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"###);
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let meta_items: Vec<_> = input.attrs.into_iter().map(|attr| attr.meta).collect();
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snapshot!(meta_items, @r###"
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[
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Meta::NameValue {
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path: Path {
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segments: [
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PathSegment {
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ident: "doc",
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},
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],
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},
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value: Expr::Lit {
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lit: " See the std::result module documentation for details.",
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},
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},
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Meta::Path {
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segments: [
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PathSegment {
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ident: "must_use",
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},
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],
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},
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]
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"###);
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}
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#[test]
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fn test_attr_with_non_mod_style_path() {
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let input = quote! {
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#[inert <T>]
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struct S;
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};
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syn::parse2::<DeriveInput>(input).unwrap_err();
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}
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#[test]
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fn test_attr_with_mod_style_path_with_self() {
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let input = quote! {
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#[foo::self]
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struct S;
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};
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snapshot!(input as DeriveInput, @r###"
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DeriveInput {
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attrs: [
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|
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Attribute {
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||
|
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style: AttrStyle::Outer,
|
||
|
|
meta: Meta::Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
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||
|
|
ident: "foo",
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|
},
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||
|
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Token![::],
|
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|
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PathSegment {
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ident: "self",
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|
},
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],
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||
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|
},
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},
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],
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vis: Visibility::Inherited,
|
||
|
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ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unit,
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
|
||
|
|
snapshot!(&input.attrs[0].meta, @r###"
|
||
|
|
Meta::Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "foo",
|
||
|
|
},
|
||
|
|
Token![::],
|
||
|
|
PathSegment {
|
||
|
|
ident: "self",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_pub_restricted() {
|
||
|
|
// Taken from tests/rust/src/test/ui/resolve/auxiliary/privacy-struct-ctor.rs
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||
|
|
let input = quote! {
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||
|
|
pub(in m) struct Z(pub(in m::n) u8);
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Restricted {
|
||
|
|
in_token: Some,
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "m",
|
||
|
|
},
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||
|
|
],
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||
|
|
},
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||
|
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},
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||
|
|
ident: "Z",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unnamed {
|
||
|
|
unnamed: [
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Restricted {
|
||
|
|
in_token: Some,
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "m",
|
||
|
|
},
|
||
|
|
Token![::],
|
||
|
|
PathSegment {
|
||
|
|
ident: "n",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "u8",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_pub_restricted_crate() {
|
||
|
|
let input = quote! {
|
||
|
|
pub(crate) struct S;
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Restricted {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "crate",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unit,
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_pub_restricted_super() {
|
||
|
|
let input = quote! {
|
||
|
|
pub(super) struct S;
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Restricted {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "super",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unit,
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_pub_restricted_in_super() {
|
||
|
|
let input = quote! {
|
||
|
|
pub(in super) struct S;
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Restricted {
|
||
|
|
in_token: Some,
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "super",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unit,
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_fields_on_unit_struct() {
|
||
|
|
let input = quote! {
|
||
|
|
struct S;
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unit,
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
|
||
|
|
let data = match input.data {
|
||
|
|
Data::Struct(data) => data,
|
||
|
|
_ => panic!("expected a struct"),
|
||
|
|
};
|
||
|
|
|
||
|
|
assert_eq!(0, data.fields.iter().count());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_fields_on_named_struct() {
|
||
|
|
let input = quote! {
|
||
|
|
struct S {
|
||
|
|
foo: i32,
|
||
|
|
pub bar: String,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Named {
|
||
|
|
named: [
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ident: Some("foo"),
|
||
|
|
colon_token: Some,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "i32",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
Token![,],
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Public,
|
||
|
|
ident: Some("bar"),
|
||
|
|
colon_token: Some,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "String",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
Token![,],
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
|
||
|
|
let data = match input.data {
|
||
|
|
Data::Struct(data) => data,
|
||
|
|
_ => panic!("expected a struct"),
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(data.fields.into_iter().collect::<Vec<_>>(), @r###"
|
||
|
|
[
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ident: Some("foo"),
|
||
|
|
colon_token: Some,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "i32",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Public,
|
||
|
|
ident: Some("bar"),
|
||
|
|
colon_token: Some,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "String",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
]
|
||
|
|
"###);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_fields_on_tuple_struct() {
|
||
|
|
let input = quote! {
|
||
|
|
struct S(i32, pub String);
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unnamed {
|
||
|
|
unnamed: [
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "i32",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
Token![,],
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Public,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "String",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
|
||
|
|
let data = match input.data {
|
||
|
|
Data::Struct(data) => data,
|
||
|
|
_ => panic!("expected a struct"),
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(data.fields.iter().collect::<Vec<_>>(), @r###"
|
||
|
|
[
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "i32",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Public,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "String",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
]
|
||
|
|
"###);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_ambiguous_crate() {
|
||
|
|
let input = quote! {
|
||
|
|
// The field type is `(crate::X)` not `crate (::X)`.
|
||
|
|
struct S(crate::X);
|
||
|
|
};
|
||
|
|
|
||
|
|
snapshot!(input as DeriveInput, @r###"
|
||
|
|
DeriveInput {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ident: "S",
|
||
|
|
generics: Generics,
|
||
|
|
data: Data::Struct {
|
||
|
|
fields: Fields::Unnamed {
|
||
|
|
unnamed: [
|
||
|
|
Field {
|
||
|
|
vis: Visibility::Inherited,
|
||
|
|
ty: Type::Path {
|
||
|
|
path: Path {
|
||
|
|
segments: [
|
||
|
|
PathSegment {
|
||
|
|
ident: "crate",
|
||
|
|
},
|
||
|
|
Token![::],
|
||
|
|
PathSegment {
|
||
|
|
ident: "X",
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
],
|
||
|
|
},
|
||
|
|
semi_token: Some,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
"###);
|
||
|
|
}
|