mirror of
https://github.com/serde-rs/serde.git
synced 2025-10-03 07:45:38 +00:00
More cleanup
This commit is contained in:
Erick Tryzelaar
parent
61317f5935
commit
f244e0f522
@ -763,31 +763,10 @@ fn deserialize_struct_unnamed_fields(
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);
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// Build `__Visitor<A, B, ...>(PhantomData<A>, PhantomData<B>, ...)`
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let (visitor_struct, visitor_expr) = if generics.ty_params.is_empty() {
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(
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builder.item().tuple_struct("__Visitor")
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.build(),
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builder.expr().id("__Visitor"),
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)
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} else {
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(
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builder.item().tuple_struct("__Visitor")
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.generics().with(generics.clone()).build()
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.with_tys(
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generics.ty_params.iter().map(|ty_param| {
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builder.ty().phantom_data().id(ty_param.ident)
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})
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)
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.build(),
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builder.expr().call().id("__Visitor")
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.with_args(
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generics.ty_params.iter().map(|_| {
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builder.expr().phantom_data()
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})
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)
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.build(),
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)
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};
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let (visitor_struct, visitor_expr) = deserialize_struct_unnamed_field_visitor(
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builder,
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generics
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);
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let struct_name = builder.expr().str(struct_ident);
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@ -796,7 +775,7 @@ fn deserialize_struct_unnamed_fields(
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.build();
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quote_expr!(cx, {
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$visitor_struct;
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$visitor_struct
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impl $trait_generics ::serde::de::Visitor for __Visitor $type_generics $where_clause {
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type Value = $value_ty;
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@ -1183,7 +1162,7 @@ fn deserialize_enum(
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enum_def: &EnumDef,
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generics: &ast::Generics,
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) -> P<ast::Expr> {
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let visitor_impl_generics = builder.from_generics(generics.clone())
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let trait_generics = builder.from_generics(generics.clone())
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.add_ty_param_bound(
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builder.path().global().ids(&["serde", "de", "Deserialize"]).build()
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)
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@ -1239,10 +1218,8 @@ fn deserialize_enum(
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fields,
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cx.expr_ident(span, cx.ident_of("visitor")),
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variant_ptr,
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&visitor_impl_generics,
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&visitor_ty,
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&visitor_expr,
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&value_ty,
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generics,
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);
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let s = builder.expr().str(name);
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@ -1253,7 +1230,7 @@ fn deserialize_enum(
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quote_expr!(cx, {
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$visitor_struct;
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impl $visitor_impl_generics ::serde::de::Visitor for $visitor_ty {
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impl $trait_generics ::serde::de::Visitor for $visitor_ty {
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type Value = $value_ty;
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fn visit_enum<__V>(&mut self,
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@ -1285,6 +1262,37 @@ fn deserialize_enum(
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})
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}
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fn deserialize_struct_unnamed_field_visitor(
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builder: &aster::AstBuilder,
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generics: &ast::Generics,
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) -> (P<ast::Item>, P<ast::Expr>) {
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if generics.ty_params.is_empty() {
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(
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builder.item().tuple_struct("__Visitor")
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.build(),
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builder.expr().id("__Visitor"),
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)
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} else {
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(
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builder.item().tuple_struct("__Visitor")
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.generics().with(generics.clone()).build()
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.with_tys(
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generics.ty_params.iter().map(|ty_param| {
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builder.ty().phantom_data().id(ty_param.ident)
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})
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)
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.build(),
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builder.expr().call().id("__Visitor")
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.with_args(
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generics.ty_params.iter().map(|_| {
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builder.expr().phantom_data()
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})
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)
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.build(),
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)
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}
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}
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fn deserialize_enum_variant(
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cx: &ExtCtxt,
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span: Span,
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@ -1294,23 +1302,69 @@ fn deserialize_enum_variant(
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fields: &StaticFields,
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state: P<ast::Expr>,
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variant_ptr: &P<ast::Variant>,
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visitor_impl_generics: &ast::Generics,
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visitor_ty: &P<ast::Ty>,
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visitor_expr: &P<ast::Expr>,
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value_ty: &P<ast::Ty>,
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generics: &ast::Generics,
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) -> P<ast::Expr> {
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let variant_path = cx.path(span, vec![type_ident, variant_ident]);
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match *fields {
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Unnamed(ref fields) => {
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if fields.is_empty() {
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Unnamed(ref fields) if fields.is_empty() => {
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let result = cx.expr_path(variant_path);
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quote_expr!(cx, {
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try!($state.visit_unit());
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Ok($result)
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})
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} else {
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}
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Unnamed(ref fields) => {
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deserialize_enum_variant_seq(
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cx,
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builder,
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&*fields,
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variant_path,
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generics,
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state,
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value_ty,
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)
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}
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Named(ref fields) => {
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deserialize_enum_variant_map(
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cx,
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span,
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builder,
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&*fields,
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variant_path,
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generics,
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state,
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value_ty,
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variant_ptr,
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)
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}
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}
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}
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fn deserialize_enum_variant_seq(
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cx: &ExtCtxt,
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builder: &aster::AstBuilder,
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fields: &[Span],
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variant_path: ast::Path,
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generics: &ast::Generics,
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state: P<ast::Expr>,
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value_ty: &P<ast::Ty>,
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) -> P<ast::Expr> {
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let trait_generics = builder.from_generics(generics.clone())
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.add_ty_param_bound(
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builder.path().global().ids(&["serde", "de", "Deserialize"]).build()
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)
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.build();
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let where_clause = &trait_generics.where_clause;
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let type_generics = builder.from_generics(trait_generics.clone())
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.strip_bounds()
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.build();
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// Create the field names for the fields.
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let field_names: Vec<ast::Ident> = (0 .. fields.len())
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.map(|i| token::str_to_ident(&format!("__field{}", i)))
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@ -1323,8 +1377,15 @@ fn deserialize_enum_variant(
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&field_names,
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);
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let (visitor_struct, visitor_expr) = deserialize_struct_unnamed_field_visitor(
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builder,
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generics
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);
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quote_expr!(cx, {
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impl $visitor_impl_generics ::serde::de::EnumSeqVisitor for $visitor_ty {
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$visitor_struct
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impl $trait_generics ::serde::de::EnumSeqVisitor for __Visitor $type_generics $where_clause {
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type Value = $value_ty;
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fn visit<
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@ -1337,8 +1398,31 @@ fn deserialize_enum_variant(
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$state.visit_seq($visitor_expr)
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})
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}
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}
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Named(ref fields) => {
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fn deserialize_enum_variant_map(
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cx: &ExtCtxt,
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span: Span,
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builder: &aster::AstBuilder,
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fields: &[(Ident, Span)],
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variant_path: ast::Path,
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generics: &ast::Generics,
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state: P<ast::Expr>,
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value_ty: &P<ast::Ty>,
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variant_ptr: &P<ast::Variant>,
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) -> P<ast::Expr> {
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let trait_generics = builder.from_generics(generics.clone())
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.add_ty_param_bound(
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builder.path().global().ids(&["serde", "de", "Deserialize"]).build()
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)
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.build();
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let where_clause = &trait_generics.where_clause;
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let type_generics = builder.from_generics(trait_generics.clone())
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.strip_bounds()
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.build();
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// Create the field names for the fields.
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let field_names: Vec<ast::Ident> = (0 .. fields.len())
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.map(|i| token::str_to_ident(&format!("__field{}", i)))
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@ -1368,10 +1452,16 @@ fn deserialize_enum_variant(
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},
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);
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let (visitor_struct, visitor_expr) = deserialize_struct_unnamed_field_visitor(
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builder,
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generics
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);
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quote_expr!(cx, {
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$visitor_struct
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$field_devisitor
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impl $visitor_impl_generics ::serde::de::EnumMapVisitor for $visitor_ty {
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impl $trait_generics ::serde::de::EnumMapVisitor for __Visitor $type_generics $where_clause {
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type Value = $value_ty;
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fn visit<
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@ -1384,5 +1474,3 @@ fn deserialize_enum_variant(
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$state.visit_map($visitor_expr)
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})
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}
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}
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}
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