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Same for deserialization

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This commit is contained in:
David Tolnay 2016-09-12 00:04:21 -07:00
parent c34baa1e5f
commit 55e5f19437
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GPG Key ID: F9BA143B95FF6D82
2 changed files with 475 additions and 594 deletions
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987
serde_codegen/src/de.rs
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82
serde_codegen/src/lib.rs
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@ -1,3 +1,5 @@
#![recursion_limit = "1000"]
#![cfg_attr(feature = "clippy", plugin(clippy))]
#![cfg_attr(feature = "clippy", feature(plugin))]
#![cfg_attr(feature = "clippy", allow(too_many_arguments))]
@ -31,6 +33,7 @@ use std::path::Path;
use syntax::feature_gate::AttributeType;
mod bound;
mod de;
mod ser;
#[cfg(feature = "with-syntex")]
@ -67,7 +70,7 @@ fn syntex_registry() -> syntex::Registry {
reg.add_attr("feature(custom_attribute)");
reg.add_decorator("derive_Serialize", expand_derive_serialize);
reg.add_decorator("derive_Deserialize", de::expand_derive_deserialize);
reg.add_decorator("derive_Deserialize", expand_derive_deserialize);
reg.add_post_expansion_pass(strip_attributes);
@ -107,53 +110,56 @@ pub fn register(reg: &mut rustc_plugin::Registry) {
syntax::ext::base::MultiDecorator(
Box::new(expand_derive_serialize)));
/*reg.register_syntax_extension(
reg.register_syntax_extension(
syntax::parse::token::intern("derive_Deserialize"),
syntax::ext::base::MultiDecorator(
Box::new(de::expand_derive_deserialize)));*/
Box::new(expand_derive_deserialize)));
reg.register_attribute("serde".to_owned(), AttributeType::Normal);
}
#[cfg(any(feature = "with-syntex", feature = "with-libsyntax"))]
use syntax::ast::MetaItem;
#[cfg(any(feature = "with-syntex", feature = "with-libsyntax"))]
use syntax::codemap::Span;
#[cfg(any(feature = "with-syntex", feature = "with-libsyntax"))]
use syntax::ext::base::{Annotatable, ExtCtxt};
macro_rules! shim {
($name:ident $pkg:ident :: $func:ident) => {
fn $func(
cx: &mut ::syntax::ext::base::ExtCtxt,
_span: ::syntax::codemap::Span,
meta_item: &::syntax::ast::MetaItem,
annotatable: &::syntax::ext::base::Annotatable,
push: &mut FnMut(::syntax::ext::base::Annotatable)
) {
let item = match *annotatable {
::syntax::ext::base::Annotatable::Item(ref item) => item,
_ => {
cx.span_err(
meta_item.span,
concat!("`#[derive(",
stringify!($name),
")]` may only be applied to structs and enums"));
return;
}
};
#[cfg(any(feature = "with-syntex", feature = "with-libsyntax"))]
fn expand_derive_serialize(
cx: &mut ExtCtxt,
_span: Span,
meta_item: &MetaItem,
annotatable: &Annotatable,
push: &mut FnMut(Annotatable)
) {
let item = match *annotatable {
Annotatable::Item(ref item) => item,
_ => {
cx.span_err(
meta_item.span,
"`#[derive(Serialize)]` may only be applied to structs and enums");
return;
use syntax::print::pprust;
let s = pprust::item_to_string(item);
let syn_item = syn::parse_item(&s).unwrap();
let expanded = $pkg::$func(&syn_item).to_string();
use syntax::parse;
let name = stringify!($name).to_string();
let cfg = Vec::new();
let sess = parse::ParseSess::new();
let impl_item = parse::parse_item_from_source_str(name, expanded, cfg, &sess);
push(::syntax::ext::base::Annotatable::Item(impl_item.unwrap().unwrap()));
}
};
use syntax::print::pprust;
let s = pprust::item_to_string(item);
let syn_item = syn::parse_item(&s).unwrap();
let expanded = ser::expand_derive_serialize(&syn_item).to_string();
use syntax::parse;
let name = "Serialize".to_string();
let cfg = Vec::new();
let sess = parse::ParseSess::new();
let impl_item = parse::parse_item_from_source_str(name, expanded, cfg, &sess);
push(Annotatable::Item(impl_item.unwrap().unwrap()));
}
#[cfg(any(feature = "with-syntex", feature = "with-libsyntax"))]
shim!(Serialize ser::expand_derive_serialize);
#[cfg(any(feature = "with-syntex", feature = "with-libsyntax"))]
shim!(Deserialize de::expand_derive_deserialize);
#[cfg(feature = "with-syn")]
pub fn expand_single_item(item: &str) -> String {
let syn_item = syn::parse_item(item).unwrap();
@ -164,7 +170,7 @@ pub fn expand_single_item(item: &str) -> String {
None
};
let expanded_de = if de {
unimplemented!()
Some(de::expand_derive_deserialize(&syn_item))
} else {
None::<quote::Tokens>
};