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use erg_common::config::ErgConfig;
use erg_common::dict::Dict;
use erg_common::log;
use erg_common::traits::{Locational, Stream};
use erg_common::Str;
use erg_parser::ast::{
Accessor, ClassAttr, ClassDef, Expr, Identifier, Methods, Module, PatchDef, PreDeclTypeSpec,
TypeAscription, TypeSpec, AST,
};
use crate::error::{TyCheckError, TyCheckErrors};
#[derive(Debug, Default)]
pub struct Reorderer {
cfg: ErgConfig,
pub def_root_pos_map: Dict<Str, usize>,
pub deps: Dict<Str, Vec<Str>>,
pub errs: TyCheckErrors,
}
impl Reorderer {
pub fn new(cfg: ErgConfig) -> Self {
Self {
cfg,
def_root_pos_map: Dict::new(),
deps: Dict::new(),
errs: TyCheckErrors::empty(),
}
}
pub fn reorder(mut self, ast: AST, mode: &str) -> Result<AST, TyCheckErrors> {
log!(info "the reordering process has started.");
let mut new = vec![];
for chunk in ast.module.into_iter() {
match chunk {
Expr::Def(def) => {
match def.body.block.first().unwrap() {
Expr::Call(call) => {
match call.obj.get_name().map(|s| &s[..]) {
Some("Class" | "Inherit" | "Inheritable") => {
self.def_root_pos_map.insert(
def.sig.ident().unwrap().inspect().clone(),
new.len(),
);
let type_def = ClassDef::new(def, vec![]);
new.push(Expr::ClassDef(type_def));
}
Some("Patch") => {
self.def_root_pos_map.insert(
def.sig.ident().unwrap().inspect().clone(),
new.len(),
);
let type_def = PatchDef::new(def, vec![]);
new.push(Expr::PatchDef(type_def));
}
_ => {
new.push(Expr::Def(def));
}
}
}
_ => {
new.push(Expr::Def(def));
}
}
}
Expr::Methods(methods) => match &methods.class {
TypeSpec::PreDeclTy(PreDeclTypeSpec::Simple(simple)) => {
self.link_methods(simple.ident.inspect().clone(), &mut new, methods, mode)
}
TypeSpec::TypeApp { spec, .. } => {
if let TypeSpec::PreDeclTy(PreDeclTypeSpec::Simple(simple)) = spec.as_ref()
{
self.link_methods(
simple.ident.inspect().clone(),
&mut new,
methods,
mode,
)
} else {
let similar_name = self
.def_root_pos_map
.keys()
.fold("".to_string(), |acc, key| acc + &key[..] + ",");
self.errs.push(TyCheckError::no_var_error(
self.cfg.input.clone(),
line!() as usize,
methods.class.loc(),
"".into(),
&methods.class.to_string(),
Some(&Str::from(similar_name)),
));
}
}
other => todo!("{other}"),
},
other => {
new.push(other);
}
}
}
let ast = AST::new(ast.name, Module::new(new));
log!(info "the reordering process has completed:\n{}", ast);
if self.errs.is_empty() {
Ok(ast)
} else {
Err(self.errs)
}
}
fn flatten_method_decls(&mut self, new: &mut Vec<Expr>, methods: Methods) {
let class = methods.class_as_expr.as_ref();
let vis = methods.vis();
for method in methods.attrs.into_iter() {
match method {
ClassAttr::Decl(decl) => {
let Expr::Accessor(Accessor::Ident(ident)) = *decl.expr else {
self.errs.push(TyCheckError::syntax_error(
self.cfg.input.clone(),
line!() as usize,
decl.expr.loc(),
"".into(),
"".into(),
None
));
continue;
};
let attr = if vis.is_public() {
Identifier::new(Some(methods.vis.clone()), ident.name)
} else {
Identifier::new(None, ident.name)
};
let expr = class.clone().attr_expr(attr);
let decl = TypeAscription::new(expr, decl.t_spec);
new.push(Expr::TypeAscription(decl));
}
ClassAttr::Doc(doc) => {
new.push(Expr::Literal(doc));
}
ClassAttr::Def(def) => {
self.errs.push(TyCheckError::syntax_error(
self.cfg.input.clone(),
line!() as usize,
def.loc(),
"".into(),
"".into(),
None,
));
}
}
}
}
fn link_methods(&mut self, name: Str, new: &mut Vec<Expr>, methods: Methods, mode: &str) {
if let Some(pos) = self.def_root_pos_map.get(&name) {
match new.remove(*pos) {
Expr::ClassDef(mut class_def) => {
class_def.methods_list.push(methods);
new.insert(*pos, Expr::ClassDef(class_def));
}
Expr::PatchDef(mut patch_def) => {
patch_def.methods_list.push(methods);
new.insert(*pos, Expr::PatchDef(patch_def));
}
_ => unreachable!(),
}
} else if mode == "declare" {
self.flatten_method_decls(new, methods);
} else {
let similar_name = self
.def_root_pos_map
.keys()
.fold("".to_string(), |acc, key| acc + &key[..] + ",");
self.errs.push(TyCheckError::no_var_error(
self.cfg.input.clone(),
line!() as usize,
methods.class.loc(),
"".into(),
&name,
Some(&Str::from(similar_name)),
));
}
}
}