macro for adding traits is done.

This commit is contained in:
Thelie 2022-03-02 19:13:31 +01:00
parent 2d2602b057
commit cb3bbdbb78
6 changed files with 191 additions and 468 deletions

View file

@ -3,13 +3,12 @@ use std::{
env,
fs,
error::Error,
io::{Write, Read}, fmt::format, path::Path,
io::{Write, Read},
};
use rand::rngs::adapter::ReseedingRng;
use serde::{Serialize, Deserialize};
use syn::{parse_macro_input, DeriveInput, AttributeArgs, ItemImpl, ImplItem};
use quote::{quote, spanned::Spanned};
use proc_macro2::{Span, Spacing, Delimiter, TokenStream, Literal, TokenTree, Ident, Punct, Group};
use sing_util::TraitProfile;
use syn::{parse_macro_input, AttributeArgs, ItemImpl, ImplItem};
use quote::{quote, spanned::Spanned, ToTokens};
extern crate sing_util;
extern crate proc_macro;
@ -51,25 +50,26 @@ fn load_trait_state() -> Result<HashMap<String, sing_util::TraitProfile>, Box<dy
}
#[proc_macro_attribute]
pub fn my_derive(input: proc_macro::TokenStream, annotated_item: proc_macro::TokenStream) -> proc_macro::TokenStream {
pub fn sing_add_trait(input: proc_macro::TokenStream, annotated_item: proc_macro::TokenStream) -> proc_macro::TokenStream {
let input = parse_macro_input!(input as ItemImpl);
let annotated_item = parse_macro_input!(annotated_item as AttributeArgs);
let trait_name;
match input.trait_ {
match &input.trait_ {
Some((_b, p, _f)) => {
trait_name = p;
trait_name = p.into_token_stream().to_string();
},
None => {
syn::Error::new(input.__span(), "This attribute can only be used on trait impl blocks.")
.to_compile_error();
trait_name = String::from("");
},
};
let mut trait_functions = vec!();
for fun in input.items {
for fun in &input.items {
match fun {
ImplItem::Method(m) => trait_functions.push(m.sig),
ImplItem::Method(m) => trait_functions.push(m.sig.to_token_stream()),
_ => {
syn::Error::new(input.__span(), "Found unexpected item that is not a method.")
.to_compile_error();
@ -77,8 +77,17 @@ pub fn my_derive(input: proc_macro::TokenStream, annotated_item: proc_macro::To
}
}
let trait_state = load_trait_state().unwrap();
let mut trait_state = load_trait_state().unwrap();
let profile = TraitProfile::new(trait_functions);
if trait_state.contains_key(trait_name.as_str()) {
let err = format!("Trait {} is implemented twice!", trait_name);
syn::Error::new(input.__span(), err.as_str())
.to_compile_error();
} else {
trait_state.insert(trait_name, profile);
}
save_trait_state(trait_state).unwrap();
// Build the output, possibly using quasi-quotation

View file

@ -2,11 +2,17 @@
name = "sing_util"
version = "0.1.0"
edition = "2021"
[lib]
bench = false
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
# build = "build.rs"
#
# [build-dependencies]
# lalrpop = "0.19"
#
[dependencies]
ron = "0.7"
rand = "0.7"
serde = { version = "1.0", features = ["derive"] }
syn = { version = "1.0", features = ["full"] }
proc-macro2 = "1.0"

View file

@ -1,37 +1,37 @@
use std::{
collections::HashMap,
env,
fs,
error::Error,
io::{Write, Read}, fmt::format,
};
use rand::rngs::adapter::ReseedingRng;
use serde::{Serialize, Deserialize};
use core::fmt::Debug;
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FunctionProfile{
inputs: String,
outputs: String,
}
use proc_macro2::TokenStream;
use serde::{Serialize, Deserialize};
use serde_wrapper::TokenStreamWrapper;
mod serde_wrapper;
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TraitProfile{
functions: HashMap<String, FunctionProfile>,
}
//functions: HashMap<String, FunctionProfile>,
functions: Vec<TokenStreamWrapper>,
}
impl TraitProfile {
pub fn get_fun_profile(&self, query: &String) -> Option<&FunctionProfile> {
self.functions.get(query)
impl TraitProfile{
pub fn new(streams: Vec<TokenStream>) -> Self {
let mut inner = vec!();
for stream in streams {
inner.push(TokenStreamWrapper::new(stream));
}
Self{
functions: inner
}
}
}
#[derive(Debug, Clone)]
enum DeduplicatedFunctionProfile {
Single(String, FunctionProfile),
Multiple(Vec<String>, FunctionProfile),
Single(String, TokenStreamWrapper),
Multiple(Vec<String>, TokenStreamWrapper),
}
/*impl<T> Evaluator<T> {
fn deduplicate_functions(&self) -> Self<T> {
let mut self = self.clone();

View file

@ -0,0 +1,71 @@
use std::{str::FromStr, fmt::{self, format}};
use proc_macro2::TokenStream;
use serde::{Serialize, Serializer, Deserialize, Deserializer, de::{Visitor, self}};
#[derive(Debug, Clone)]
pub struct TokenStreamWrapper(TokenStream);
impl TokenStreamWrapper {
pub fn new(stream: TokenStream) -> Self {
Self(stream)
}
}
impl Serialize for TokenStreamWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
let inner = &self.0;
serializer.serialize_newtype_struct("Lifetime", &inner.to_string())
}
}
impl<'de> Deserialize<'de> for TokenStreamWrapper {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>
{
let tok_str = deserializer.deserialize_string(TokenStreamVisitor)?;
match TokenStream::from_str(&tok_str.as_str()) {
Ok(t) => Ok(Self(t)),
Err(e) => Err(de::Error::custom(
format!("string does not represent a valid TokenStream: {}", e)
))
}
}
}
struct TokenStreamVisitor;
impl<'de> Visitor<'de> for TokenStreamVisitor {
type Value = String;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("A string representing a TokenStream")
}
fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
Ok(value.to_string())
}
fn visit_borrowed_str<E>(self, value: &'de str) -> Result<Self::Value, E>
where
E: de::Error,
{
Ok(value.to_string())
}
fn visit_string<E>(self, value: String) -> Result<Self::Value, E>
where
E: de::Error,
{
Ok(value)
}
}

View file

@ -1,5 +1,6 @@
use core::fmt::Debug;
use proc_macro2::TokenStream;
use serde::{Serialize, Deserialize};
use serde_wrapper::TokenStreamWrapper;
@ -11,6 +12,20 @@ struct TraitProfile{
functions: Vec<TokenStreamWrapper>,
}
impl TraitProfile{
pub fn new(streams: Vec<TokenStream>) -> Self {
let mut inner = vec!();
for stream in streams {
inner.push(TokenStreamWrapper::new(stream));
}
Self{
functions: inner
}
}
}
#[derive(Debug, Clone)]
enum DeduplicatedFunctionProfile {
Single(String, TokenStreamWrapper),

View file

@ -1,370 +1,17 @@
use std::{str::FromStr, fmt::{self, format}};
use proc_macro2::TokenStream;
use serde::{Serialize, Deserialize, Serializer, Deserializer, ser::{SerializeStruct, SerializeTupleVariant, SerializeStructVariant}};
use syn::{ImplItemMethod, Visibility, Signature, Pat, FnArg, Type, PatIdent, Ident, __private::{Span, ToTokens}, Receiver, ReturnType, Generics, GenericParam, QSelf, Path, Lifetime, TraitBound, TypeParamBound};
use core::fmt::{Debug, Formatter};
use std::error::Error;
#[derive(Clone)]
pub (crate) struct ImplItemMethodWrapper(ImplItemMethod);
impl Debug for ImplItemMethodWrapper {
fn fmt(&self, _: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
todo!()
}
}
impl Serialize for ImplItemMethodWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
let inner = &self.0;
let mut state = serializer.serialize_struct("Color", 4)?;
// Attribute macros are not important in our case.
state.serialize_field("vis", &VisibilityWrapper(&inner.vis));
// Defaultness are also not important here.
state.serialize_field("sig", &SignatureWrapper(&inner.sig));
// We can throw away the block too.
state.end()
}
}
impl<'de> Deserialize<'de> for ImplItemMethodWrapper {
fn deserialize<D>(_: D) -> Result<Self, <D as Deserializer<'de>>::Error> where D: Deserializer<'de> {
todo!()
}
}
struct VisibilityWrapper<'a>(&'a Visibility);
impl Serialize for VisibilityWrapper<'_> {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
match &self.0 {
Visibility::Public(_) => serializer.serialize_unit_variant("Visibility", 0, "Pub"),
Visibility::Crate(_) => serializer.serialize_unit_variant("Visibility", 1, "Crate"),
Visibility::Restricted(r) => serializer.serialize_newtype_variant(
"Visibility",
2,
"Restricted",
&PathWrapper(*r.path),
),
Visibility::Inherited => serializer.serialize_unit_variant("Visibility", 3, "Inherited"),
}
}
}
struct SignatureWrapper<'a>(&'a Signature);
impl Serialize for SignatureWrapper<'_> {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
let inner = &self.0;
let mut state = serializer.serialize_struct("Signature", 7)?;
let mut prefixes = vec!();
if inner.constness.is_some() {
prefixes.push("const")
}
if inner.asyncness.is_some() {
prefixes.push("async")
}
if inner.unsafety.is_some() {
prefixes.push("unsafe")
}
state.serialize_field("prefixes", &prefixes)?;
match &inner.abi {
Some(a) => state.serialize_field(
"abi",
&Some(
format!(
"extern {}",
match &a.name {
Some(n) => n.value(),
None => String::from(""),
}
).as_str()
)
),
None => state.serialize_field("abi", &None::<String>),
}?;
// No need to serialize the Fn token
state.serialize_field("ident", &inner.ident.to_string())?;
state.serialize_field("generics", &GenericsWrapper(inner.generics))?;
// Parentheses do not need to be serialized either
serialize_iterator_struct(
&mut state,
Box::new(inner
.inputs
.clone()
.into_iter()
),
"inputs",
| inp: &FnArg | -> Result<(PatWrapper, Option<TypeWrapper>), Box<dyn Error>> {
match inp {
FnArg::Receiver(r) => Ok(patopt_from_receiver(r.clone())),
FnArg::Typed(t) => Ok((PatWrapper(*t.pat.clone()), Some(TypeWrapper(*t.ty.clone())))),
}
}
);
state.serialize_field("variadic", match inner.variadic{
Some(_) => "...",
None => "",
})?;
match &inner.output{
ReturnType::Default => {state.serialize_field("output", "()")?;},
ReturnType::Type(_, t) => {(state.serialize_field("output", &TypeWrapper(*t.clone())))?;}
};
state.end()
}
}
struct GenericsWrapper(Generics);
impl Serialize for GenericsWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
todo!()
/*let inner = &self.0;
let mut state = serializer.serialize_struct("Signature", 7)?;
serialize_iterator(
&mut state,
Box::new(inner
.params
.clone()
.into_iter()
),
"params",
| inp: &GenericParam | -> Result<(PatWrapper, Option<TypeWrapper>), Box<dyn Error>> {
match inp {
GenericParam::Type(t) => t,
GenericParam::Lifetime() => {},
GenericParam::Const() => {},
}
}
);
state.end()*/
}
}
struct PatWrapper(Pat);
impl Serialize for PatWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
let inner = &self.0;
match inner {
Pat::Box(b) => serializer.serialize_newtype_variant("Pat", 0, "Box", &PatWrapper(*b.pat.clone())),
Pat::Ident(i) => {
let mut state = serializer.serialize_struct_variant("Pat", 1, "Ident", 4)?;
if i.by_ref.is_some() {
state.serialize_field("by_ref", &Some(String::from("ref")));
} else {
state.serialize_field("by_ref", &None::<String>);
}
if i.mutability.is_some() {
state.serialize_field("mutability", &Some(String::from("mut")));
} else {
state.serialize_field("mutability", &None::<String>);
}
state.serialize_field("ident", &i.ident.to_string());
if let Some((_, s)) = &i.subpat {
state.serialize_field("subpat", &PatWrapper(*s.clone()));
} else {
state.serialize_field("subpat", &None::<PatWrapper>);
}
state.end()
}
Pat::Path(p) => {
let mut state = serializer.serialize_struct_variant("Pat", 5, "Path", 2)?;
if let Some(q) = &p.qself {
state.serialize_field("QSelf", &Some(QSelfWrapper(q.clone())));
} else {
state.serialize_field("QSelf", &None::<QSelfWrapper>);
}
state.serialize_field("Path", &PathWrapper(p.path.clone()));
state.end()
}
Pat::Reference(r) => {
let mut state = serializer.serialize_struct_variant("Pat", 7, "Reference", 2)?;
if r.mutability.is_some() {
state.serialize_field("mutability", &Some(String::from("mut")));
} else {
state.serialize_field("mutability", &None::<String>);
}
state.serialize_field("pat", &PatWrapper(*r.pat.clone()));
state.end()
}
Pat::Slice(s) => {
let mut state = serializer.serialize_struct_variant("Pat", 9, "Slice", 1)?;
serialize_iterator_struct_variant(
&mut state,
Box::new(
s.elems
.clone()
.into_iter()
),
"elems",
|p: &Pat| -> Result<PatWrapper, Box<dyn Error>> {Ok(PatWrapper(p.clone()))}
);
state.end()
}
Pat::Tuple(t) => {
let mut state = serializer.serialize_struct_variant("Pat", 11, "Tuple", 1)?;
serialize_iterator_struct_variant(
&mut state,
Box::new(
t.elems
.clone()
.into_iter()
),
"elems",
|p: &Pat| -> Result<PatWrapper, Box<dyn Error>> {Ok(PatWrapper(p.clone()))}
);
state.end()
}
Pat::Type(t) => {
let mut state = serializer.serialize_struct_variant("Pat", 13, "Type", 2)?;
state.serialize_field("pat", &PatWrapper(*t.pat.clone()));
state.serialize_field("ty", &TypeWrapper(*t.ty.clone()));
state.end()
}
Pat::Verbatim(t) => serializer.serialize_newtype_variant("Pat", 14, "Verbatim", &t.to_string()),
Pat::Wild(_) => serializer.serialize_unit_variant("Pat", 15, "Wild"),
// The rest can't be used in function arguments.
_ => unimplemented!()
}
}
}
struct TypeWrapper( Type);
impl Serialize for TypeWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
let inner = &self.0;
match inner {
Type::Array(a) => {
let mut state = serializer.serialize_struct_variant("Pat", 0, "Type", 2)?;
state.serialize_field("elem", &TypeWrapper(*a.elem.clone()));
// TODO: this is somewhat inelegant:
state.serialize_field("len", &a.len.to_token_stream().to_string());
state.end()
}
Type::Group(g) => serializer.serialize_newtype_variant("Type", 2, "Group", &TypeWrapper(*g.elem.clone())),
Type::ImplTrait(t) => {
let mut state = serializer.serialize_struct_variant("Pat", 11, "Tuple", 1)?;
serialize_iterator_struct_variant(
&mut state,
Box::new(
t.bounds
.clone()
.into_iter()
),
"elems",
|p: &TypeParamBound| -> Result<PatWrapper, Box<dyn Error>> {Ok(PatWrapper(p.clone()))}
);
state.end()
}
// The rest can't be used in function arguments.
_ => unimplemented!()
}
}
}
struct PathWrapper(Path);
impl Serialize for PathWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
/*let mut path_str = String::from("");
for seg in &r.path.segments {
// There should be no arguments in the paths passed here.
path_str.push_str(seg.ident.to_string().as_str());
path_str.push_str("::");
}
serializer.serialize_str(
format!("pub ({})", path_str).as_str()
)*/
todo!()
}
}
struct QSelfWrapper(QSelf);
impl Serialize for QSelfWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
todo!()
}
}
struct LifetimeWrapper(Lifetime);
impl Serialize for LifetimeWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
{
let inner = &self.0;
serializer.serialize_newtype_struct("Lifetime", &inner.ident.to_string())
}
}
use serde::{Serialize, Serializer, Deserialize, Deserializer, de::{Visitor, self}};
#[derive(Debug, Clone)]
pub struct TokenStreamWrapper(TokenStream);
impl TokenStreamWrapper {
pub fn new(stream: TokenStream) -> Self {
Self(stream)
}
}
impl Serialize for TokenStreamWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
@ -375,75 +22,50 @@ impl Serialize for TokenStreamWrapper {
}
}
struct TraitBoundWrapper(TraitBound);
impl Serialize for TraitBoundWrapper {
fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
S: Serializer
impl<'de> Deserialize<'de> for TokenStreamWrapper {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>
{
let inner = &self.0;
todo!();
}
}
let tok_str = deserializer.deserialize_string(TokenStreamVisitor)?;
fn patopt_from_receiver(r: Receiver) -> (PatWrapper, Option<TypeWrapper>) {
let mut ident = String::from("");
if let Some((_, lt)) = &r.reference {
ident.push('&');
match lt {
Some(l) => ident.push_str(
l.ident
.to_string()
.as_str()
),
None => {},
}
ident.push(' ');
match TokenStream::from_str(&tok_str.as_str()) {
Ok(t) => Ok(Self(t)),
Err(e) => Err(de::Error::custom(
format!("string does not represent a valid TokenStream: {}", e)
))
}
}
}
struct TokenStreamVisitor;
impl<'de> Visitor<'de> for TokenStreamVisitor {
type Value = String;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("A string representing a TokenStream")
}
fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
Ok(value.to_string())
}
fn visit_borrowed_str<E>(self, value: &'de str) -> Result<Self::Value, E>
where
E: de::Error,
{
Ok(value.to_string())
}
fn visit_string<E>(self, value: String) -> Result<Self::Value, E>
where
E: de::Error,
{
Ok(value)
}
(PatWrapper(Pat::Ident(PatIdent{
attrs: vec!(),
by_ref: None,
mutability: r.mutability,
ident: Ident::new(&ident, Span::call_site()),
subpat: None,
})), None)
}
fn serialize_iterator_struct<S, T, F, U> (serializer: &mut S, iterator: Box<dyn Iterator<Item = T>>, field_name: &'static str, item_fun: F)
-> Result<(), Box<dyn Error>>
where
F: Fn(&T) -> Result<U, Box<dyn Error>>,
S: SerializeStruct ,
U: Serialize,
{
let mut p_vec = vec!();
for item in iterator {
p_vec.push(item_fun(&item)?);
}
serializer.serialize_field(field_name, &p_vec);
Ok(())
}
// Thanks to weird traits in Serde we need to duplicate code here…
// TODO: Maybe to this as a macro
fn serialize_iterator_struct_variant<S, T, F, U> (serializer: &mut S, iterator: Box<dyn Iterator<Item = T>>, field_name: &'static str, item_fun: F)
-> Result<(), Box<dyn Error>>
where
F: Fn(&T) -> Result<U, Box<dyn Error>>,
S: SerializeStructVariant ,
U: Serialize,
{
let mut p_vec = vec!();
for item in iterator {
p_vec.push(item_fun(&item)?);
}
serializer.serialize_field(field_name, &p_vec);
Ok(())
}