#![allow(clippy::result_unit_err)]
pub mod cache;
pub mod compare;
pub mod eval;
pub mod generalize;
pub mod hint;
pub mod initialize;
pub mod inquire;
pub mod instantiate;
pub mod register;
pub mod test;
pub mod unify;
use std::fmt;
use std::mem;
use std::option::Option; use std::path::{Path, PathBuf};
use erg_common::config::ErgConfig;
use erg_common::config::Input;
use erg_common::dict::Dict;
use erg_common::error::Location;
use erg_common::impl_display_from_debug;
use erg_common::set::Set;
use erg_common::traits::{Locational, Stream};
use erg_common::vis::Visibility;
use erg_common::Str;
use erg_common::{fn_name, get_hash, log};
use ast::{DefId, DefKind, VarName};
use erg_parser::ast;
use erg_parser::token::Token;
use crate::context::instantiate::{ConstTemplate, TyVarCache};
use crate::error::{TyCheckError, TyCheckErrors};
use crate::module::{SharedCompilerResource, SharedModuleCache};
use crate::ty::value::ValueObj;
use crate::ty::{Predicate, Type};
use crate::varinfo::{AbsLocation, Mutability, VarInfo, VarKind};
use Type::*;
use Visibility::*;
pub trait ContextProvider {
fn dir(&self) -> Vec<(&VarName, &VarInfo)>;
fn get_receiver_ctx(&self, receiver_name: &str) -> Option<&Context>;
fn get_var_info(&self, name: &str) -> Option<(&VarName, &VarInfo)>;
}
const BUILTINS: &Str = &Str::ever("<builtins>");
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct TraitImpl {
pub sub_type: Type,
pub sup_trait: Type,
}
impl std::fmt::Display for TraitImpl {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "TraitImpl{{{} <: {}}}", self.sub_type, self.sup_trait)
}
}
impl TraitImpl {
pub const fn new(sub_type: Type, sup_trait: Type) -> Self {
Self {
sub_type,
sup_trait,
}
}
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum ClassDefType {
Simple(Type),
ImplTrait { class: Type, impl_trait: Type },
}
impl std::fmt::Display for ClassDefType {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
ClassDefType::Simple(ty) => write!(f, "{ty}"),
ClassDefType::ImplTrait { class, impl_trait } => {
write!(f, "{class}|<: {impl_trait}|")
}
}
}
}
impl ClassDefType {
pub const fn impl_trait(class: Type, impl_trait: Type) -> Self {
ClassDefType::ImplTrait { class, impl_trait }
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum DefaultInfo {
NonDefault,
WithDefault,
}
impl_display_from_debug!(DefaultInfo);
impl DefaultInfo {
pub const fn has_default(&self) -> bool {
matches!(self, DefaultInfo::WithDefault)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
pub enum Variance {
Covariant, Contravariant, #[default]
Invariant, }
impl_display_from_debug!(Variance);
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct ParamSpec {
pub(crate) name: Option<&'static str>,
pub(crate) t: Type,
pub default_info: DefaultInfo,
loc: AbsLocation,
}
impl ParamSpec {
pub const fn new(
name: Option<&'static str>,
t: Type,
default: DefaultInfo,
loc: AbsLocation,
) -> Self {
Self {
name,
t,
default_info: default,
loc,
}
}
pub const fn named(name: &'static str, t: Type, default: DefaultInfo) -> Self {
Self::new(Some(name), t, default, AbsLocation::unknown())
}
pub const fn named_nd(name: &'static str, t: Type) -> Self {
Self::new(
Some(name),
t,
DefaultInfo::NonDefault,
AbsLocation::unknown(),
)
}
pub const fn t(name: &'static str, default: DefaultInfo) -> Self {
Self::new(Some(name), Type, default, AbsLocation::unknown())
}
pub const fn t_nd(name: &'static str) -> Self {
Self::new(
Some(name),
Type,
DefaultInfo::NonDefault,
AbsLocation::unknown(),
)
}
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum ContextKind {
Func,
Proc,
Class,
MethodDefs(Option<Type>), PatchMethodDefs(Type),
Trait,
StructuralTrait,
Patch(Type),
StructuralPatch(Type),
GluePatch(TraitImpl), Module,
Instant,
Dummy,
}
impl From<DefKind> for ContextKind {
fn from(kind: DefKind) -> Self {
match kind {
DefKind::Class | DefKind::Inherit => Self::Class,
DefKind::Trait | DefKind::Subsume => Self::Trait,
DefKind::StructuralTrait => Self::StructuralTrait,
DefKind::ErgImport | DefKind::PyImport => Self::Module,
DefKind::Other => Self::Instant,
}
}
}
impl ContextKind {
pub const fn is_method_def(&self) -> bool {
matches!(self, Self::MethodDefs(_))
}
pub const fn is_type(&self) -> bool {
matches!(self, Self::Class | Self::Trait | Self::StructuralTrait)
}
pub fn is_class(&self) -> bool {
matches!(self, Self::Class)
}
pub fn is_trait(&self) -> bool {
matches!(self, Self::Trait | Self::StructuralTrait)
}
pub fn is_patch(&self) -> bool {
matches!(self, Self::Patch(_) | Self::GluePatch(_))
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum RegistrationMode {
PreRegister,
Normal,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct ContextInfo {
mod_id: usize,
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct MethodInfo {
definition_type: Type,
method_type: VarInfo,
}
impl fmt::Display for MethodInfo {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{{ def: {} info: {} }}",
self.definition_type, self.method_type
)
}
}
impl MethodInfo {
pub const fn new(definition_type: Type, method_type: VarInfo) -> Self {
Self {
definition_type,
method_type,
}
}
}
#[derive(Debug, Clone)]
pub struct Context {
pub name: Str,
pub kind: ContextKind,
pub(crate) cfg: ErgConfig,
pub(crate) preds: Vec<Predicate>,
pub(crate) outer: Option<Box<Context>>,
pub(crate) const_param_defaults: Dict<Str, Vec<ConstTemplate>>,
pub(crate) super_classes: Vec<Type>, pub(crate) super_traits: Vec<Type>, pub(crate) methods_list: Vec<(ClassDefType, Context)>,
pub(crate) method_to_traits: Dict<Str, Vec<MethodInfo>>,
pub(crate) method_to_classes: Dict<Str, Vec<MethodInfo>>,
pub(crate) method_impl_patches: Dict<VarName, Vec<VarName>>,
pub(crate) trait_impls: Dict<Str, Set<TraitImpl>>,
pub(crate) decls: Dict<VarName, VarInfo>,
pub(crate) future_defined_locals: Dict<VarName, VarInfo>,
pub(crate) deleted_locals: Dict<VarName, VarInfo>,
pub(crate) params: Vec<(Option<VarName>, VarInfo)>,
pub(crate) locals: Dict<VarName, VarInfo>,
pub(crate) consts: Dict<VarName, ValueObj>,
pub(crate) mono_types: Dict<VarName, (Type, Context)>,
pub(crate) poly_types: Dict<VarName, (Type, Context)>,
pub(crate) patches: Dict<VarName, Context>,
pub(crate) shared: Option<SharedCompilerResource>,
pub(crate) tv_cache: Option<TyVarCache>,
pub(crate) higher_order_caller: Vec<Str>,
pub(crate) level: usize,
}
impl Default for Context {
#[inline]
fn default() -> Self {
Self::default_with_name("<dummy>")
}
}
impl fmt::Display for Context {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Context")
.field("name", &self.name)
.field("preds", &self.preds)
.field("params", &self.params)
.field("decls", &self.decls)
.field("locals", &self.params)
.field("consts", &self.consts)
.field("mono_types", &self.mono_types)
.field("poly_types", &self.poly_types)
.field("patches", &self.patches)
.finish()
}
}
impl ContextProvider for Context {
fn dir(&self) -> Vec<(&VarName, &VarInfo)> {
let mut vars: Vec<_> = self
.locals
.iter()
.chain(
self.params
.iter()
.filter_map(|(k, v)| k.as_ref().map(|k| (k, v))),
)
.chain(self.methods_list.iter().flat_map(|(_, ctx)| ctx.dir()))
.collect();
for sup in self.super_classes.iter() {
if let Some((_, sup_ctx)) = self.get_nominal_type_ctx(sup) {
vars.extend(sup_ctx.type_dir());
}
}
if let Some(outer) = self.get_outer() {
vars.extend(outer.dir());
} else if let Some(builtins) = self.get_builtins() {
vars.extend(builtins.locals.iter());
}
vars
}
fn get_receiver_ctx(&self, receiver_name: &str) -> Option<&Context> {
self.get_mod(receiver_name)
.or_else(|| self.rec_get_type(receiver_name).map(|(_, ctx)| ctx))
.or_else(|| {
let (_, vi) = self.get_var_info(receiver_name)?;
self.get_nominal_type_ctx(&vi.t).map(|(_, ctx)| ctx)
})
}
fn get_var_info(&self, name: &str) -> Option<(&VarName, &VarInfo)> {
self.get_var_kv(name).or_else(|| {
self.get_builtins()
.and_then(|builtin| builtin.get_var_kv(name))
})
}
}
impl Context {
pub fn dir(&self) -> Vec<(&VarName, &VarInfo)> {
ContextProvider::dir(self)
}
pub fn get_receiver_ctx(&self, receiver_name: &str) -> Option<&Context> {
ContextProvider::get_receiver_ctx(self, receiver_name)
}
pub fn get_receiver_ctxs(&self, receiver_name: &str) -> Vec<&Context> {
let mut ctxs = vec![];
if let Some(receiver_ctx) = self.get_receiver_ctx(receiver_name) {
ctxs.push(receiver_ctx);
ctxs.extend(
receiver_ctx
.super_classes
.iter()
.flat_map(|t| self.get_nominal_type_ctx(t).map(|(_, ctx)| ctx)),
);
}
ctxs
}
pub fn get_var_info(&self, name: &str) -> Option<(&VarName, &VarInfo)> {
ContextProvider::get_var_info(self, name)
}
}
impl Context {
#[allow(clippy::too_many_arguments)]
#[inline]
pub fn new(
name: Str,
cfg: ErgConfig,
kind: ContextKind,
params: Vec<ParamSpec>,
outer: Option<Context>,
shared: Option<SharedCompilerResource>,
level: usize,
) -> Self {
Self::with_capacity(name, cfg, kind, params, outer, shared, 0, level)
}
pub fn default_with_name(name: &'static str) -> Self {
Self::new(
name.into(),
ErgConfig::default(),
ContextKind::Dummy,
vec![],
None,
None,
Self::TOP_LEVEL,
)
}
#[allow(clippy::too_many_arguments)]
pub fn with_capacity(
name: Str,
cfg: ErgConfig,
kind: ContextKind,
params: Vec<ParamSpec>,
outer: Option<Context>,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
let mut params_ = Vec::new();
for param in params.into_iter() {
let id = DefId(get_hash(&(&name, ¶m)));
if let Some(name) = param.name {
let kind = VarKind::parameter(id, param.default_info);
let muty = Mutability::from(name);
let vi = VarInfo::new(param.t, muty, Private, kind, None, None, None, param.loc);
params_.push((Some(VarName::new(Token::static_symbol(name))), vi));
} else {
let kind = VarKind::parameter(id, param.default_info);
let muty = Mutability::Immutable;
let vi = VarInfo::new(param.t, muty, Private, kind, None, None, None, param.loc);
params_.push((None, vi));
}
}
Self {
name,
cfg,
kind,
preds: vec![],
outer: outer.map(Box::new),
super_classes: vec![],
super_traits: vec![],
methods_list: vec![],
const_param_defaults: Dict::default(),
method_to_traits: Dict::default(),
method_to_classes: Dict::default(),
method_impl_patches: Dict::default(),
trait_impls: Dict::default(),
params: params_,
decls: Dict::default(),
future_defined_locals: Dict::default(),
deleted_locals: Dict::default(),
locals: Dict::with_capacity(capacity),
consts: Dict::default(),
mono_types: Dict::default(),
poly_types: Dict::default(),
shared,
tv_cache: None,
patches: Dict::default(),
higher_order_caller: vec![],
level,
}
}
#[inline]
pub fn mono(
name: Str,
cfg: ErgConfig,
kind: ContextKind,
outer: Option<Context>,
shared: Option<SharedCompilerResource>,
level: usize,
) -> Self {
Self::new(name, cfg, kind, vec![], outer, shared, level)
}
#[allow(clippy::too_many_arguments)]
#[inline]
pub fn poly(
name: Str,
cfg: ErgConfig,
kind: ContextKind,
params: Vec<ParamSpec>,
outer: Option<Context>,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
Self::with_capacity(name, cfg, kind, params, outer, shared, capacity, level)
}
pub fn poly_trait<S: Into<Str>>(
name: S,
params: Vec<ParamSpec>,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
let name = name.into();
Self::poly(
name,
cfg,
ContextKind::Trait,
params,
None,
shared,
capacity,
level,
)
}
#[inline]
pub fn builtin_poly_trait<S: Into<Str>>(
name: S,
params: Vec<ParamSpec>,
capacity: usize,
) -> Self {
Self::poly_trait(
name,
params,
ErgConfig::default(),
None,
capacity,
Self::TOP_LEVEL,
)
}
pub fn poly_class<S: Into<Str>>(
name: S,
params: Vec<ParamSpec>,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
let name = name.into();
Self::poly(
name,
cfg,
ContextKind::Class,
params,
None,
shared,
capacity,
level,
)
}
#[inline]
pub fn builtin_poly_class<S: Into<Str>>(
name: S,
params: Vec<ParamSpec>,
capacity: usize,
) -> Self {
Self::poly_class(
name,
params,
ErgConfig::default(),
None,
capacity,
Self::TOP_LEVEL,
)
}
#[allow(clippy::too_many_arguments)]
pub fn poly_patch<S: Into<Str>>(
name: S,
base: Type,
params: Vec<ParamSpec>,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
let name = name.into();
Self::poly(
name,
cfg,
ContextKind::Patch(base),
params,
None,
shared,
capacity,
level,
)
}
#[inline]
pub fn mono_trait<S: Into<Str>>(
name: S,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
Self::poly_trait(name, vec![], cfg, shared, capacity, level)
}
#[inline]
pub fn builtin_mono_trait<S: Into<Str>>(name: S, capacity: usize) -> Self {
Self::mono_trait(name, ErgConfig::default(), None, capacity, Self::TOP_LEVEL)
}
#[inline]
pub fn mono_class<S: Into<Str>>(
name: S,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
Self::poly_class(name, vec![], cfg, shared, capacity, level)
}
#[inline]
pub fn builtin_mono_class<S: Into<Str>>(name: S, capacity: usize) -> Self {
Self::mono_class(name, ErgConfig::default(), None, capacity, Self::TOP_LEVEL)
}
#[inline]
pub fn mono_patch<S: Into<Str>>(
name: S,
base: Type,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
Self::poly_patch(name, base, vec![], cfg, shared, capacity, level)
}
#[inline]
pub fn methods(
impl_trait: Option<Type>,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
let name = if let Some(tr) = &impl_trait {
tr.local_name()
} else {
Str::ever("Methods")
};
Self::with_capacity(
name,
cfg,
ContextKind::MethodDefs(impl_trait),
vec![],
None,
shared,
capacity,
level,
)
}
#[inline]
pub fn builtin_methods(impl_trait: Option<Type>, capacity: usize) -> Self {
Self::methods(
impl_trait,
ErgConfig::default(),
None,
capacity,
Self::TOP_LEVEL,
)
}
#[allow(clippy::too_many_arguments)]
#[inline]
pub fn poly_glue_patch<S: Into<Str>>(
name: S,
base: Type,
impls: Type,
params: Vec<ParamSpec>,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
level: usize,
) -> Self {
Self::poly(
name.into(),
cfg,
ContextKind::GluePatch(TraitImpl::new(base, impls)),
params,
None,
shared,
capacity,
level,
)
}
#[inline]
pub fn builtin_poly_glue_patch<S: Into<Str>>(
name: S,
base: Type,
impls: Type,
params: Vec<ParamSpec>,
capacity: usize,
) -> Self {
Self::poly_glue_patch(
name,
base,
impls,
params,
ErgConfig::default(),
None,
capacity,
Self::TOP_LEVEL,
)
}
#[inline]
pub fn module(
name: Str,
cfg: ErgConfig,
shared: Option<SharedCompilerResource>,
capacity: usize,
) -> Self {
Self::with_capacity(
name,
cfg,
ContextKind::Module,
vec![],
None,
shared,
capacity,
Self::TOP_LEVEL,
)
}
#[inline]
pub fn builtin_module<S: Into<Str>>(name: S, cfg: ErgConfig, capacity: usize) -> Self {
Self::module(name.into(), cfg, None, capacity)
}
#[inline]
pub fn instant(
name: Str,
cfg: ErgConfig,
capacity: usize,
shared: Option<SharedCompilerResource>,
outer: Context,
) -> Self {
Self::with_capacity(
name,
cfg,
ContextKind::Instant,
vec![],
Some(outer),
shared,
capacity,
Self::TOP_LEVEL,
)
}
pub(crate) fn module_path(&self) -> Option<&PathBuf> {
if let Input::File(path) = &self.cfg.input {
Some(path)
} else {
None
}
}
pub(crate) fn absolutize(&self, loc: Location) -> AbsLocation {
AbsLocation::new(self.module_path().cloned(), loc)
}
#[inline]
pub fn caused_by(&self) -> String {
String::from(&self.name[..])
}
pub(crate) fn get_outer(&self) -> Option<&Context> {
self.outer.as_ref().map(|x| x.as_ref())
}
pub(crate) fn impl_of(&self) -> Option<Type> {
if let ContextKind::MethodDefs(Some(tr)) = &self.kind {
Some(tr.clone())
} else {
None
}
}
pub(crate) fn path(&self) -> Str {
if let Some(outer) = self.get_outer() {
outer.path()
} else if self.kind == ContextKind::Module {
self.name.clone()
} else {
BUILTINS.clone()
}
}
pub(crate) fn get_builtins(&self) -> Option<&Context> {
if self.kind != ContextKind::Module || &self.path()[..] != "<builtins>" {
self.shared
.as_ref()
.map(|shared| shared.mod_cache.ref_ctx(Path::new("<builtins>")).unwrap())
.map(|mod_ctx| &mod_ctx.context)
} else {
None
}
}
pub fn initialize(&mut self) {
let mut shared = mem::take(&mut self.shared);
if let Some(mod_cache) = shared.as_mut().map(|s| &mut s.mod_cache) {
mod_cache.initialize();
}
if let Some(py_mod_cache) = shared.as_mut().map(|s| &mut s.py_mod_cache) {
py_mod_cache.initialize();
}
*self = Self::new(
self.name.clone(),
self.cfg.clone(),
self.kind.clone(),
vec![],
None,
shared,
self.level,
);
}
pub(crate) fn grow(
&mut self,
name: &str,
kind: ContextKind,
vis: Visibility,
tv_cache: Option<TyVarCache>,
) {
let name = if vis.is_public() {
format!("{parent}.{name}", parent = self.name)
} else {
format!("{parent}::{name}", parent = self.name)
};
log!(info "{}: current namespace: {name}", fn_name!());
self.outer = Some(Box::new(mem::take(self)));
self.cfg = self.get_outer().unwrap().cfg.clone();
self.shared = self.get_outer().unwrap().shared.clone();
self.tv_cache = tv_cache;
self.name = name.into();
self.kind = kind;
}
pub(crate) fn clear_invalid_vars(&mut self) {
self.locals.retain(|_, v| v.t != Failure);
self.decls.retain(|_, v| v.t != Failure);
self.params.retain(|(_, v)| v.t != Failure);
}
pub fn pop(&mut self) -> Context {
if let Some(parent) = self.outer.as_mut() {
let parent = mem::take(parent);
let ctx = mem::take(self);
*self = *parent;
log!(info "{}: current namespace: {}", fn_name!(), self.name);
ctx
} else {
panic!("cannot pop the top-level context (or use `pop_mod`)");
}
}
pub fn pop_mod(&mut self) -> Option<Context> {
if self.outer.is_some() {
log!(err "not in the top-level context");
None
} else {
log!(info "{}: current namespace: <builtins>", fn_name!());
Some(mem::take(self))
}
}
pub(crate) fn check_decls_and_pop(&mut self) -> Result<Context, TyCheckErrors> {
self.check_decls().map_err(|errs| {
self.pop();
errs
})?;
Ok(self.pop())
}
pub(crate) fn check_decls(&mut self) -> Result<(), TyCheckErrors> {
let mut uninited_errs = TyCheckErrors::empty();
for (name, vi) in self.decls.iter() {
uninited_errs.push(TyCheckError::uninitialized_error(
self.cfg.input.clone(),
line!() as usize,
name.loc(),
self.caused_by(),
name.inspect(),
&vi.t,
));
}
if !uninited_errs.is_empty() {
Err(uninited_errs)
} else {
Ok(())
}
}
fn type_dir(&self) -> Vec<(&VarName, &VarInfo)> {
self.locals
.iter()
.chain(self.methods_list.iter().flat_map(|(_, ctx)| ctx.dir()))
.collect()
}
pub(crate) fn mod_cache(&self) -> Option<&SharedModuleCache> {
self.shared.as_ref().map(|shared| &shared.mod_cache)
}
pub(crate) fn py_mod_cache(&self) -> Option<&SharedModuleCache> {
self.shared.as_ref().map(|shared| &shared.py_mod_cache)
}
#[cfg(feature = "els")]
pub fn index(&self) -> Option<&crate::module::SharedModuleIndex> {
self.shared.as_ref().map(|shared| &shared.index)
}
pub fn shared(&self) -> Option<&SharedCompilerResource> {
self.shared.as_ref()
}
}
#[derive(Debug, Clone, Default)]
pub struct ModuleContext {
pub context: Context,
pub scope: Dict<Str, Context>,
}
impl ModuleContext {
pub const fn new(toplevel: Context, scope: Dict<Str, Context>) -> Self {
Self {
context: toplevel,
scope,
}
}
}