Initial commit of syndicate-macros crate, still incomplete
This commit is contained in:
parent
4f30faa1ba
commit
f0205f06ca
|
@ -1302,6 +1302,16 @@ dependencies = [
|
|||
"tracing-subscriber",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syndicate-macros"
|
||||
version = "0.2.0"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
"syndicate",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syndicate-server"
|
||||
version = "0.2.0"
|
||||
|
@ -1309,6 +1319,7 @@ dependencies = [
|
|||
"futures",
|
||||
"structopt",
|
||||
"syndicate",
|
||||
"syndicate-macros",
|
||||
"tokio",
|
||||
"tokio-tungstenite",
|
||||
"tokio-util",
|
||||
|
|
|
@ -1,6 +1,7 @@
|
|||
[workspace]
|
||||
members = [
|
||||
"syndicate",
|
||||
"syndicate-macros",
|
||||
"syndicate-server",
|
||||
]
|
||||
|
||||
|
|
|
@ -0,0 +1,15 @@
|
|||
[package]
|
||||
name = "syndicate-macros"
|
||||
version = "0.2.0"
|
||||
authors = ["Tony Garnock-Jones <tonyg@leastfixedpoint.com>"]
|
||||
edition = "2018"
|
||||
|
||||
[lib]
|
||||
proc-macro = true
|
||||
|
||||
[dependencies]
|
||||
syndicate = { path = "../syndicate", version = "^0.2.0" }
|
||||
|
||||
proc-macro2 = "^1.0"
|
||||
quote = "^1.0"
|
||||
syn = "^1.0"
|
|
@ -0,0 +1,112 @@
|
|||
use syndicate::value::IOValue;
|
||||
use syndicate::value::NestedValue;
|
||||
use syndicate::value::Value;
|
||||
use syndicate::value::text::iovalue_from_str;
|
||||
|
||||
extern crate proc_macro;
|
||||
use proc_macro::Span;
|
||||
use proc_macro::TokenStream;
|
||||
|
||||
use quote::ToTokens;
|
||||
use quote::quote;
|
||||
|
||||
use std::convert::TryFrom;
|
||||
|
||||
use syn::parse_macro_input;
|
||||
use syn::ExprLit;
|
||||
use syn::Ident;
|
||||
use syn::Lit;
|
||||
use syn::LitByteStr;
|
||||
|
||||
fn lit<T: ToTokens>(e: T) -> TokenStream {
|
||||
quote!(
|
||||
syndicate::schemas::dataspace_patterns::Pattern::DLit(Box::new(
|
||||
syndicate::schemas::dataspace_patterns::DLit { value: #e }))).into()
|
||||
}
|
||||
|
||||
fn compile_pattern(v: &IOValue) -> TokenStream {
|
||||
match v.value() {
|
||||
Value::Boolean(b) => lit(quote!(syndicate::value::Value::from(#b).wrap())),
|
||||
Value::Float(f) => {
|
||||
let f = f.0;
|
||||
lit(quote!(syndicate::value::Value::from(#f).wrap()))
|
||||
}
|
||||
Value::Double(d) => {
|
||||
let d = d.0;
|
||||
lit(quote!(syndicate::value::Value::from(#d).wrap()))
|
||||
}
|
||||
Value::SignedInteger(i) => {
|
||||
let i = i128::try_from(i).expect("Literal integer out-of-range");
|
||||
lit(quote!(syndicate::value::Value::from(#i).wrap()))
|
||||
}
|
||||
Value::String(s) => lit(quote!(syndicate::value::Value::from(#s).wrap())),
|
||||
Value::ByteString(bs) => {
|
||||
let bs = LitByteStr::new(bs, Span::call_site().into());
|
||||
lit(quote!(syndicate::value::Value::from(#bs).wrap()))
|
||||
}
|
||||
Value::Symbol(s) => match s.as_str() {
|
||||
"$" => quote!(
|
||||
syndicate::schemas::dataspace_patterns::Pattern::DBind(Box::new(
|
||||
syndicate::schemas::dataspace_patterns::DBind {
|
||||
pattern: syndicate::schemas::dataspace_patterns::Pattern::DDiscard(Box::new(
|
||||
syndicate::schemas::dataspace_patterns::DDiscard))
|
||||
}))).into(),
|
||||
"_" => quote!(
|
||||
syndicate::schemas::dataspace_patterns::Pattern::DDiscard(Box::new(
|
||||
syndicate::schemas::dataspace_patterns::DDiscard))).into(),
|
||||
_ => if s.starts_with("=") {
|
||||
let id = Ident::new(&s[1..], Span::call_site().into());
|
||||
lit(quote!(#id))
|
||||
} else {
|
||||
// let s = LitStr::new(s, Span::call_site().into());
|
||||
lit(quote!(syndicate::value::Value::symbol(#s).wrap()))
|
||||
},
|
||||
}
|
||||
Value::Record(r) => {
|
||||
let arity = r.arity() as u128;
|
||||
match r.label().value().as_symbol() {
|
||||
None => panic!("Record labels in patterns must be symbols"),
|
||||
Some(label) => {
|
||||
let mut i = 0;
|
||||
let members = r.fields().iter().map(
|
||||
|f| {
|
||||
let p: proc_macro2::TokenStream = compile_pattern(f).into();
|
||||
let result = quote!((#i .into(), #p));
|
||||
i += 1;
|
||||
result
|
||||
}).collect::<Vec<_>>();
|
||||
quote!(
|
||||
syndicate::schemas::dataspace_patterns::Pattern::DCompound(Box::new(
|
||||
syndicate::schemas::dataspace_patterns::DCompound::Rec {
|
||||
ctor: Box::new(syndicate::schemas::dataspace_patterns::CRec {
|
||||
label: syndicate::value::Value::symbol(#label).wrap(),
|
||||
arity: #arity .into(),
|
||||
}),
|
||||
members: syndicate::value::Map::from_iter(vec![#(#members),*])
|
||||
}))).into()
|
||||
}
|
||||
}
|
||||
}
|
||||
// Value::Sequence(vs) => ,
|
||||
// Value::Set(_) => panic!("Cannot match sets in patterns"),
|
||||
// Value::Dictionary(d) => ,
|
||||
// Value::Embedded(e) => panic!("aiee"),
|
||||
_ => todo!(),
|
||||
}
|
||||
}
|
||||
|
||||
#[proc_macro]
|
||||
pub fn pattern(src: TokenStream) -> TokenStream {
|
||||
if let Lit::Str(s) = parse_macro_input!(src as ExprLit).lit {
|
||||
match iovalue_from_str(&s.value()) {
|
||||
Ok(v) => {
|
||||
let e = compile_pattern(&v);
|
||||
// println!("{:#}", &e);
|
||||
return e;
|
||||
}
|
||||
Err(_) => (),
|
||||
}
|
||||
}
|
||||
|
||||
panic!("Expected literal string containing the pattern and no more");
|
||||
}
|
Loading…
Reference in New Issue