340 lines
15 KiB
Rust
340 lines
15 KiB
Rust
use std::io::Write;
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use std::num::NonZero;
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use std::sync::Arc;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::{mem, process, thread};
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use async_std::channel::{Receiver, Sender};
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use async_std::sync::Mutex;
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use futures::FutureExt;
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use futures::future::LocalBoxFuture;
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use hashbrown::HashMap;
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use itertools::Itertools;
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use orchid_api_traits::{Decode, Encode, enc_vec};
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use orchid_base::builtin::ExtPort;
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use orchid_base::char_filter::{char_filter_match, char_filter_union, mk_char_filter};
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use orchid_base::clone;
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use orchid_base::interner::{Tok, init_replica, sweep_replica};
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use orchid_base::logging::Logger;
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use orchid_base::macros::{mtreev_from_api, mtreev_to_api};
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use orchid_base::name::{PathSlice, Sym};
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use orchid_base::parse::{Comment, Snippet};
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use orchid_base::reqnot::{Receipt, ReqHandlish, ReqNot, RequestHandle, Requester};
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use orchid_base::tree::{ttv_from_api, ttv_to_api};
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use substack::Substack;
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use crate::api;
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use crate::atom::{AtomCtx, AtomDynfo};
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use crate::atom_owned::OBJ_STORE;
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use crate::fs::VirtFS;
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use crate::lexer::{LexContext, err_cascade, err_not_applicable};
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use crate::macros::{RuleCtx, apply_rule};
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use crate::msg::{recv_parent_msg, send_parent_msg};
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use crate::system::{SysCtx, atom_by_idx};
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use crate::system_ctor::{CtedObj, DynSystemCtor};
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use crate::tree::{GenTok, GenTokTree, LazyMemberFactory, TIACtxImpl, do_extra};
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pub type ExtReq<'a> = RequestHandle<'a, api::ExtMsgSet>;
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pub type ExtReqNot = ReqNot<api::ExtMsgSet>;
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pub struct ExtensionData {
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pub name: &'static str,
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pub systems: &'static [&'static dyn DynSystemCtor],
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}
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impl ExtensionData {
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pub fn new(name: &'static str, systems: &'static [&'static dyn DynSystemCtor]) -> Self {
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Self { name, systems }
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}
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pub fn main(self) { extension_main(self) }
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}
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pub enum MemberRecord {
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Gen(Sym, LazyMemberFactory),
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Res,
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}
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pub struct SystemRecord {
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cted: CtedObj,
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vfses: HashMap<api::VfsId, &'static dyn VirtFS>,
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declfs: api::EagerVfs,
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lazy_members: HashMap<api::TreeId, MemberRecord>,
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}
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pub async fn with_atom_record<T>(
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get_sys_ctx: &impl Fn(api::SysId, ReqNot<api::ExtMsgSet>) -> SysCtx,
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reqnot: ReqNot<api::ExtMsgSet>,
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atom: &api::Atom,
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cb: impl for<'c> FnOnce(
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Box<dyn AtomDynfo>,
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SysCtx,
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api::AtomId,
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&'c [u8],
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) -> LocalBoxFuture<'c, T>,
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) -> T {
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let mut data = &atom.data[..];
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let ctx = get_sys_ctx(atom.owner, reqnot);
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let inst = ctx.cted.inst();
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let id = api::AtomId::decode(&mut data);
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let atom_record = atom_by_idx(inst.card(), id).expect("Atom ID reserved");
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cb(atom_record, ctx, id, data).await
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}
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pub fn extension_main(data: ExtensionData) {
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if thread::Builder::new()
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.name(format!("ext-main:{}", data.name))
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.spawn(|| extension_main_logic(data))
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.unwrap()
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.join()
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.is_err()
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{
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process::exit(-1)
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}
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}
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pub struct ExtensionOwner {
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rn: ReqNot<api::ExtMsgSet>,
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out_recv: Receiver<Vec<u8>>,
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out_send: Sender<Vec<u8>>,
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}
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impl ExtPort for ExtensionOwner {
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fn send<'a>(&'a self, msg: &'a [u8]) -> LocalBoxFuture<'a, ()> {
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self.rn.receive(msg).boxed_local()
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}
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fn recv<'a, 's: 'a>(
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&'s self,
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cb: Box<dyn FnOnce(&[u8]) -> LocalBoxFuture<'a, ()> + 'a>,
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) -> LocalBoxFuture<'a, ()> {
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async { cb(&self.out_recv.recv().await.unwrap()[..]).await }.boxed_local()
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}
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}
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fn extension_main_logic(data: ExtensionData) {
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let api::HostHeader { log_strategy } = api::HostHeader::decode(&mut std::io::stdin().lock());
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let mut buf = Vec::new();
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let decls = (data.systems.iter().enumerate())
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.map(|(id, sys)| (u16::try_from(id).expect("more than u16max system ctors"), sys))
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.map(|(id, sys)| sys.decl(api::SysDeclId(NonZero::new(id + 1).unwrap())))
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.collect_vec();
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let systems = Arc::new(Mutex::new(HashMap::<api::SysId, SystemRecord>::new()));
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api::ExtensionHeader { name: data.name.to_string(), systems: decls.clone() }.encode(&mut buf);
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std::io::stdout().write_all(&buf).unwrap();
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std::io::stdout().flush().unwrap();
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let exiting = Arc::new(AtomicBool::new(false));
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let logger = Arc::new(Logger::new(log_strategy));
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let mk_ctx = clone!(
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logger, systems;
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move |id: api::SysId, reqnot: ReqNot<api::ExtMsgSet>| async {
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let cted = systems.lock().await[&id].cted.clone();
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SysCtx { id, cted, logger: logger.clone(), reqnot }
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}.boxed_local()
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);
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let rn = ReqNot::<api::ExtMsgSet>::new(
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clone!(logger; move |a, _| async {
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logger.log_buf("Upsending", a);
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send_parent_msg(a).await.unwrap()
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}.boxed_local()),
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clone!(systems, exiting, mk_ctx; move |n, reqnot| async {
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match n {
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api::HostExtNotif::Exit => exiting.store(true, Ordering::Relaxed),
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api::HostExtNotif::SystemDrop(api::SystemDrop(sys_id)) =>
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mem::drop(systems.lock().await.remove(&sys_id)),
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api::HostExtNotif::AtomDrop(api::AtomDrop(sys_id, atom)) =>
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OBJ_STORE.get(atom.0).unwrap().remove().dyn_free(mk_ctx(sys_id, reqnot).await),
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}
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}.boxed_local()),
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{
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let systems = systems.clone();
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let logger = logger.clone();
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(move|hand,req|async {
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let receipt:Receipt = match req {
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api::HostExtReq::Ping(ping@api::Ping) => hand.handle(&ping, &()).await,
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api::HostExtReq::Sweep(sweep@api::Sweep) => hand.handle(&sweep, &sweep_replica()).await,
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api::HostExtReq::SysReq(api::SysReq::NewSystem(new_sys)) => {
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let i = decls.iter().enumerate().find(|(_,s)|s.id==new_sys.system).unwrap().0;
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let cted = data.systems[i].new_system(&new_sys);
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let mut vfses = HashMap::new();
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let lex_filter = cted.inst().dyn_lexers().iter().fold(api::CharFilter(vec![]), |cf,lx|{
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let lxcf = mk_char_filter(lx.char_filter().iter().cloned());
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char_filter_union(&cf, &lxcf)
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});
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let mut lazy_mems = HashMap::new();
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let ctx = SysCtx {
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cted:cted.clone(),id:new_sys.id,logger:logger.clone(),reqnot:hand.reqnot()
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};
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let mut tia_ctx = TIACtxImpl {
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lazy: &mut lazy_mems,sys:ctx.clone(),basepath: &[],path:Substack::Bottom,
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};
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let const_root = (cted.inst().dyn_env().into_iter()).map(|(k,v)|(k.to_api(),v.into_api(&mut tia_ctx))).collect();
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systems.lock().unwrap().insert(new_sys.id,SystemRecord {
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declfs:cted.inst().dyn_vfs().to_api_rec(&mut vfses),vfses,cted,lazy_members:lazy_mems
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});
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hand.handle(&new_sys, &api::SystemInst {
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lex_filter,const_root,line_types:vec![]
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}).await
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}
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api::HostExtReq::GetMember(get_tree@api::GetMember(sys_id,tree_id)) => {
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let mut systems_g = systems.lock().unwrap();
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let sys = systems_g.get_mut(&sys_id).expect("System not found");
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let lazy = &mut sys.lazy_members;
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let(path,cb) = match lazy.insert(tree_id,MemberRecord::Res){
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None => panic!("Tree for ID not found"),
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Some(MemberRecord::Res) => panic!("This tree has already been transmitted"),
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Some(MemberRecord::Gen(path,cb)) => (path,cb),
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};
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let tree = cb.build(path.clone());
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hand.handle(&get_tree, &tree.into_api(&mut TIACtxImpl {
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sys:SysCtx::new(sys_id, &sys.cted, &logger,hand.reqnot()),path:Substack::Bottom,basepath: &path,lazy,
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})).await
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}
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api::HostExtReq::VfsReq(api::VfsReq::GetVfs(get_vfs@api::GetVfs(sys_id))) => {
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let systems_g = systems.lock().unwrap();
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hand.handle(&get_vfs, &systems_g[&sys_id].declfs).await
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}
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api::HostExtReq::SysReq(api::SysReq::SysFwded(fwd)) => {
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let api::SysFwded(sys_id,payload) = fwd;
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let ctx = mk_ctx(sys_id,hand.reqnot());
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let sys = ctx.cted.inst();
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sys.dyn_request(hand,payload)
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}
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api::HostExtReq::VfsReq(api::VfsReq::VfsRead(vfs_read)) => {
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let api::VfsRead(sys_id,vfs_id,path) = &vfs_read;
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let systems_g = systems.lock().unwrap();
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let path = path.iter().map(|t|Tok::from_api(*t)).collect_vec();
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hand.handle(&vfs_read, &systems_g[sys_id].vfses[vfs_id].load(PathSlice::new(&path))).await
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}
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api::HostExtReq::LexExpr(lex@api::LexExpr {
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sys,text,pos,id
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}) => {
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let systems_g = systems.lock().unwrap();
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let lexers = systems_g[&sys].cted.inst().dyn_lexers();
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mem::drop(systems_g);
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let text = Tok::from_api(text);
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let ctx = LexContext {
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sys,id,pos,reqnot:hand.reqnot(),text: &text
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};
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let trigger_char = text.await.chars().nth(pos as usize).unwrap();
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for lx in lexers.iter().filter(|l|char_filter_match(l.char_filter(),trigger_char)){
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match lx.lex(&text[pos as usize..], &ctx){
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Err(e)if e.any(|e| *e==err_not_applicable()) => continue,
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Err(e) => {
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let eopt = e.keep_only(|e| *e!=err_cascade()).map(|e|Err(e.to_api()));
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return hand.handle(&lex, &eopt)
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},
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Ok((s,expr)) => {
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let ctx = mk_ctx(sys,hand.reqnot());
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let expr = expr.to_api(&mut |f,r|do_extra(f,r,ctx.clone()));
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let pos = (text.len()-s.len())as u32;
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return hand.handle(&lex, &Some(Ok(api::LexedExpr {
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pos,expr
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})))
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}
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}
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}writeln!(logger,"Got notified about n/a character '{trigger_char}'");
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hand.handle(&lex, &None).await
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},
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api::HostExtReq::ParseLine(pline) => {
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let api::ParseLine {
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exported,comments,sys,line
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} = &pline;
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let mut ctx = mk_ctx(*sys,hand.reqnot());
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let parsers = ctx.cted.inst().dyn_parsers();
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let comments = comments.iter().map(Comment::from_api).collect();
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let line:Vec<GenTokTree> = ttv_from_api(line, &mut ctx);
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let snip = Snippet::new(line.first().expect("Empty line"), &line);
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let(head,tail) = snip.pop_front().unwrap();
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let name = if let GenTok::Name(n) = &head.tok {
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n
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}else {
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panic!("No line head")
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};
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let parser = parsers.iter().find(|p|p.line_head()== **name).expect("No parser candidate");
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let o_line = match parser.parse(*exported,comments,tail){
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Err(e) => Err(e.to_api()),
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Ok(t) => Ok(ttv_to_api(t, &mut |f,range|{
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api::TokenTree {
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range,token:api::Token::Atom(f.clone().build(ctx.clone()))
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}
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})),
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};
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hand.handle(&pline, &o_line).await
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}
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api::HostExtReq::AtomReq(atom_req) => {
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let atom = atom_req.get_atom();
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with_atom_record(&mk_ctx,hand.reqnot(),atom, |nfo,ctx,id,buf|async {
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let actx = AtomCtx(buf,atom.drop,ctx.clone());
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match&atom_req {
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api::AtomReq::SerializeAtom(ser) => {
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let mut buf = enc_vec(&id);
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let refs_opt = nfo.serialize(actx, &mut buf);
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hand.handle(ser, &refs_opt.map(|refs|(buf,refs))),await
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}
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api::AtomReq::AtomPrint(print@api::AtomPrint(_)) => hand.handle(print, &nfo.print(actx)).await,
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api::AtomReq::Fwded(fwded) => {
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let api::Fwded(_,key,payload) = &fwded;
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let mut reply = Vec::new();
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let some = nfo.handle_req(actx,Sym::from_api(*key), &mut &payload[..], &mut reply);
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hand.handle(fwded, &some.then_some(reply)).await
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}
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api::AtomReq::CallRef(call@api::CallRef(_,arg)) => {
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let ret = nfo.call_ref(actx, *arg);
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hand.handle(call, &ret.api_return(ctx.clone(), &mut |h|hand.defer_drop(h))).await
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},
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api::AtomReq::FinalCall(call@api::FinalCall(_,arg)) => {
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let ret = nfo.call(actx, *arg);
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hand.handle(call, &ret.api_return(ctx.clone(), &mut |h|hand.defer_drop(h))).await
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}
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api::AtomReq::Command(cmd@api::Command(_)) => {
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hand.handle(cmd, &match nfo.command(actx){
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Err(e) => Err(e.to_api()),
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Ok(opt) => Ok(match opt {
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None => api::NextStep::Halt,
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Some(cont) => api::NextStep::Continue(cont.api_return(ctx.clone(), &mut |h|hand.defer_drop(h))),
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})
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}).await
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}
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}
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}).await
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},
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api::HostExtReq::DeserAtom(deser) => {
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let api::DeserAtom(sys,buf,refs) = &deser;
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let mut read = &mut &buf[..];
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let ctx = mk_ctx(*sys,hand.reqnot());
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let id = api::AtomId::decode(&mut read);
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let inst = ctx.cted.inst();
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let nfo = atom_by_idx(inst.card(),id).expect("Deserializing atom with invalid ID");
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hand.handle(&deser, &nfo.deserialize(ctx.clone(),read,refs)).await
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},
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orchid_api::HostExtReq::ApplyMacro(am) => {
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let tok = hand.will_handle_as(&am);
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let sys_ctx = mk_ctx(am.sys,hand.reqnot());
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let ctx = RuleCtx {
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args:(am.params.into_iter()).map(|(k,v)|(Tok::from_api(k),mtreev_from_api(&v, &mut |_|panic!("No atom in macro prompt!")))).collect(),run_id:am.run_id,sys:sys_ctx.clone(),
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};
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hand.handle_as(tok, &match apply_rule(am.id,ctx){
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Err(e) => e.keep_only(|e| *e!=err_cascade()).map(|e|Err(e.to_api())),
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Ok(t) => Some(Ok(mtreev_to_api(&t, &mut |a|{
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api::MacroToken::Atom(a.clone().build(sys_ctx.clone()))
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}))),
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}).await
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}
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};
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receipt
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}.boxed_local())
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},
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);
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init_replica(rn.clone().map());
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while !exiting.load(Ordering::Relaxed) {
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let rcvd = recv_parent_msg().unwrap();
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rn.receive(&rcvd)
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}
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}
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