refactor for HM style inference...
This commit is contained in:
parent
52a82e8a39
commit
2985b88351
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@ -0,0 +1,163 @@
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use std::collections::HashMap;
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use super::primitives::get_var;
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use super::symbol_resolver::*;
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use super::typedef::*;
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use rustpython_parser::ast::Location;
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/// Structure for storing top-level type definitions.
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/// Used for collecting type signature from source code.
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/// Can be converted to `InferenceContext` for type inference in functions.
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#[derive(Clone)]
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pub struct GlobalContext<'a> {
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/// List of type definitions.
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pub type_defs: Vec<TypeDef<'a>>,
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/// List of type variable definitions.
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pub var_defs: Vec<VarDef<'a>>,
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}
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impl<'a> GlobalContext<'a> {
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pub fn new(type_defs: Vec<TypeDef<'a>>) -> GlobalContext {
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GlobalContext {
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type_defs,
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var_defs: Vec::new(),
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}
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}
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pub fn add_type(&mut self, def: TypeDef<'a>) -> TypeId {
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self.type_defs.push(def);
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TypeId(self.type_defs.len() - 1)
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}
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pub fn add_variable(&mut self, def: VarDef<'a>) -> VariableId {
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self.var_defs.push(def);
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VariableId(self.var_defs.len() - 1)
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}
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pub fn get_type_def_mut(&mut self, id: TypeId) -> &mut TypeDef<'a> {
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self.type_defs.get_mut(id.0).unwrap()
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}
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pub fn get_type_def(&self, id: TypeId) -> &TypeDef {
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self.type_defs.get(id.0).unwrap()
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}
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pub fn get_var_def(&self, id: VariableId) -> &VarDef {
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self.var_defs.get(id.0).unwrap()
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}
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pub fn get_var_count(&self) -> usize {
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self.var_defs.len()
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}
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}
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pub struct InferenceContext<'a> {
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// a: (i, x) means that a.i = x
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pub fields_assignment: HashMap<VariableId, Vec<(&'a str, VariableId, Location)>>,
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pub constraints: Vec<(Type, Type)>,
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global: GlobalContext<'a>,
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resolver: Box<dyn SymbolResolver>,
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local_identifiers: HashMap<&'a str, Type>,
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local_variables: Vec<VarDef<'a>>,
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fresh_var_id: usize,
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}
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impl<'a> InferenceContext<'a> {
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pub fn new(
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global: GlobalContext<'a>,
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resolver: Box<dyn SymbolResolver>,
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) -> InferenceContext<'a> {
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let id = global.get_var_count();
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InferenceContext {
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global,
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fields_assignment: HashMap::new(),
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constraints: Vec::new(),
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resolver,
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local_identifiers: HashMap::new(),
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local_variables: Vec::new(),
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fresh_var_id: id,
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}
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}
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fn get_fresh_var(&mut self) -> VariableId {
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self.local_variables.push(VarDef {
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name: None,
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bound: Vec::new(),
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});
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let id = self.fresh_var_id;
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self.fresh_var_id += 1;
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VariableId(id)
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}
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pub fn assign_identifier(&mut self, identifier: &'a str) -> Type {
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if let Some(t) = self.local_identifiers.get(identifier) {
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t.clone()
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} else if let Some(SymbolType::Identifier(t)) = self.resolver.get_symbol_type(identifier) {
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t
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} else {
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get_var(self.get_fresh_var())
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}
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}
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pub fn get_identifier_type(&self, identifier: &'a str) -> Result<Type, String> {
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if let Some(t) = self.local_identifiers.get(identifier) {
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Ok(t.clone())
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} else if let Some(SymbolType::Identifier(t)) = self.resolver.get_symbol_type(identifier) {
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Ok(t)
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} else {
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Err("unbounded identifier".into())
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}
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}
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pub fn get_attribute_type(
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&mut self,
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expr: Type,
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identifier: &'a str,
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location: Location,
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) -> Result<Type, String> {
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match expr.as_ref() {
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TypeEnum::TypeVariable(id) => {
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if !self.fields_assignment.contains_key(id) {
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self.fields_assignment.insert(*id, Vec::new());
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}
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let var_id = VariableId(self.fresh_var_id);
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let entry = self.fields_assignment.get_mut(&id).unwrap();
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for (attr, t, _) in entry.iter() {
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if *attr == identifier {
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return Ok(get_var(*t));
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}
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}
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entry.push((identifier, var_id, location));
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self.local_variables.push(VarDef {
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name: None,
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bound: Vec::new(),
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});
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self.fresh_var_id += 1;
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Ok(get_var(var_id))
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}
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TypeEnum::ClassType(id, params) => {
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let type_def = self.global.get_type_def(*id);
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let field = type_def
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.base
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.fields
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.get(identifier)
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.map_or_else(|| Err("no such field".to_owned()), |v| Ok(v))?;
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// function and tuple can have 0 type variables but with type parameters
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// we require other types have the same number of type variables and type
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// parameters in order to build a mapping
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assert!(type_def.params.len() == 0 || type_def.params.len() == params.len());
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let map = type_def
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.params
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.clone()
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.into_iter()
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.zip(params.clone().into_iter())
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.collect();
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Ok(field.subst(&map))
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}
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}
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}
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pub fn get_type_def(&self, id: TypeId) -> &TypeDef {
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self.global.get_type_def(id)
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}
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}
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@ -1,109 +0,0 @@
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use super::super::typedef::*;
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use std::collections::HashMap;
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use std::rc::Rc;
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/// Structure for storing top-level type definitions.
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/// Used for collecting type signature from source code.
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/// Can be converted to `InferenceContext` for type inference in functions.
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pub struct GlobalContext<'a> {
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/// List of primitive definitions.
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pub(super) primitive_defs: Vec<TypeDef<'a>>,
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/// List of class definitions.
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pub(super) class_defs: Vec<ClassDef<'a>>,
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/// List of parametric type definitions.
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pub(super) parametric_defs: Vec<ParametricDef<'a>>,
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/// List of type variable definitions.
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pub(super) var_defs: Vec<VarDef<'a>>,
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/// Function name to signature mapping.
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pub(super) fn_table: HashMap<&'a str, FnDef>,
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primitives: Vec<Type>,
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variables: Vec<Type>,
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}
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impl<'a> GlobalContext<'a> {
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pub fn new(primitive_defs: Vec<TypeDef<'a>>) -> GlobalContext {
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let mut primitives = Vec::new();
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for (i, t) in primitive_defs.iter().enumerate() {
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primitives.push(TypeEnum::PrimitiveType(PrimitiveId(i)).into());
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}
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GlobalContext {
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primitive_defs,
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class_defs: Vec::new(),
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parametric_defs: Vec::new(),
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var_defs: Vec::new(),
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fn_table: HashMap::new(),
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primitives,
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variables: Vec::new(),
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}
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}
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pub fn add_class(&mut self, def: ClassDef<'a>) -> ClassId {
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self.class_defs.push(def);
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ClassId(self.class_defs.len() - 1)
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}
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pub fn add_parametric(&mut self, def: ParametricDef<'a>) -> ParamId {
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self.parametric_defs.push(def);
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ParamId(self.parametric_defs.len() - 1)
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}
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pub fn add_variable(&mut self, def: VarDef<'a>) -> VariableId {
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self.add_variable_private(def)
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}
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pub fn add_variable_private(&mut self, def: VarDef<'a>) -> VariableId {
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self.var_defs.push(def);
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self.variables
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.push(TypeEnum::TypeVariable(VariableId(self.var_defs.len() - 1)).into());
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VariableId(self.var_defs.len() - 1)
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}
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pub fn add_fn(&mut self, name: &'a str, def: FnDef) {
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self.fn_table.insert(name, def);
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}
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pub fn get_fn_def(&self, name: &str) -> Option<&FnDef> {
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self.fn_table.get(name)
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}
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pub fn get_primitive_def_mut(&mut self, id: PrimitiveId) -> &mut TypeDef<'a> {
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self.primitive_defs.get_mut(id.0).unwrap()
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}
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pub fn get_primitive_def(&self, id: PrimitiveId) -> &TypeDef {
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self.primitive_defs.get(id.0).unwrap()
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}
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pub fn get_class_def_mut(&mut self, id: ClassId) -> &mut ClassDef<'a> {
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self.class_defs.get_mut(id.0).unwrap()
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}
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pub fn get_class_def(&self, id: ClassId) -> &ClassDef {
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self.class_defs.get(id.0).unwrap()
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}
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pub fn get_parametric_def_mut(&mut self, id: ParamId) -> &mut ParametricDef<'a> {
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self.parametric_defs.get_mut(id.0).unwrap()
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}
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pub fn get_parametric_def(&self, id: ParamId) -> &ParametricDef {
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self.parametric_defs.get(id.0).unwrap()
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}
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pub fn get_variable_def_mut(&mut self, id: VariableId) -> &mut VarDef<'a> {
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self.var_defs.get_mut(id.0).unwrap()
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}
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pub fn get_variable_def(&self, id: VariableId) -> &VarDef {
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self.var_defs.get(id.0).unwrap()
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}
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pub fn get_primitive(&self, id: PrimitiveId) -> Type {
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self.primitives.get(id.0).unwrap().clone()
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}
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pub fn get_variable(&self, id: VariableId) -> Type {
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self.variables.get(id.0).unwrap().clone()
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}
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}
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@ -1,202 +0,0 @@
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use super::super::location::{FileID, Location};
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use super::super::symbol_resolver::*;
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use super::super::typedef::*;
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use super::GlobalContext;
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use rustpython_parser::ast;
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use std::boxed::Box;
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use std::collections::HashMap;
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struct ContextStack<'a> {
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/// stack level, starts from 0
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level: u32,
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/// stack of symbol definitions containing (name, level) where `level` is the smallest level
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/// where the name is assigned a value
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sym_def: Vec<(&'a str, u32)>,
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}
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pub struct InferenceContext<'a> {
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/// global context
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global: GlobalContext<'a>,
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/// per source symbol resolver
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resolver: Box<dyn SymbolResolver>,
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/// File ID
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file: FileID,
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/// identifier to (type, readable) mapping.
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/// an identifier might be defined earlier but has no value (for some code path), thus not
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/// readable.
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sym_table: HashMap<&'a str, (Type, bool, Location)>,
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/// stack
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stack: ContextStack<'a>,
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}
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// non-trivial implementations here
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impl<'a> InferenceContext<'a> {
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pub fn new(
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global: GlobalContext,
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resolver: Box<dyn SymbolResolver>,
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file: FileID,
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) -> InferenceContext {
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InferenceContext {
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global,
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resolver,
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file,
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sym_table: HashMap::new(),
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stack: ContextStack {
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level: 0,
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sym_def: Vec::new(),
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},
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}
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}
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/// execute the function with new scope.
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/// variable assignment would be limited within the scope (not readable outside), and type
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/// returns the list of variables assigned within the scope, and the result of the function
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pub fn with_scope<F, R>(&mut self, f: F) -> (Vec<(&'a str, Type, Location)>, R)
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where
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F: FnOnce(&mut Self) -> R,
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{
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self.stack.level += 1;
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let result = f(self);
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self.stack.level -= 1;
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let mut poped_names = Vec::new();
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while !self.stack.sym_def.is_empty() {
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let (_, level) = self.stack.sym_def.last().unwrap();
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if *level > self.stack.level {
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let (name, _) = self.stack.sym_def.pop().unwrap();
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let (t, b, l) = self.sym_table.get_mut(name).unwrap();
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// set it to be unreadable
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*b = false;
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poped_names.push((name, t.clone(), *l));
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} else {
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break;
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}
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}
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(poped_names, result)
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}
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/// assign a type to an identifier.
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/// may return error if the identifier was defined but with different type
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pub fn assign(&mut self, name: &'a str, ty: Type, loc: ast::Location) -> Result<Type, String> {
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if let Some((t, x, _)) = self.sym_table.get_mut(name) {
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if t == &ty {
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if !*x {
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self.stack.sym_def.push((name, self.stack.level));
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}
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*x = true;
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Ok(ty)
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} else {
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Err("different types".into())
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}
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} else {
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self.stack.sym_def.push((name, self.stack.level));
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self.sym_table.insert(
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name,
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(ty.clone(), true, Location::CodeRange(self.file, loc)),
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);
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Ok(ty)
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}
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}
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/// get the type of an identifier
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/// may return error if the identifier is not defined, and cannot be resolved with the
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/// resolution function.
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pub fn resolve(&self, name: &str) -> Result<Type, String> {
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if let Some((t, x, _)) = self.sym_table.get(name) {
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if *x {
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Ok(t.clone())
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} else {
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Err("may not be defined".into())
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}
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} else {
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match self.resolver.get_symbol_type(name) {
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Some(SymbolType::Identifier(t)) => Ok(t),
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Some(SymbolType::TypeName(_)) => Err("is not a value".into()),
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_ => Err("unbounded identifier".into()),
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}
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}
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}
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pub fn get_location(&self, name: &str) -> Option<Location> {
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if let Some((_, _, l)) = self.sym_table.get(name) {
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Some(*l)
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} else {
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self.resolver.get_symbol_location(name)
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}
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}
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}
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// trivial getters:
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impl<'a> InferenceContext<'a> {
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pub fn get_primitive(&self, id: PrimitiveId) -> Type {
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TypeEnum::PrimitiveType(id).into()
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}
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pub fn get_variable(&self, id: VariableId) -> Type {
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TypeEnum::TypeVariable(id).into()
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}
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pub fn get_fn_def(&self, name: &str) -> Option<&FnDef> {
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self.global.fn_table.get(name)
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}
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pub fn get_primitive_def(&self, id: PrimitiveId) -> &TypeDef {
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self.global.primitive_defs.get(id.0).unwrap()
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}
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pub fn get_class_def(&self, id: ClassId) -> &ClassDef {
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self.global.class_defs.get(id.0).unwrap()
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}
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pub fn get_parametric_def(&self, id: ParamId) -> &ParametricDef {
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self.global.parametric_defs.get(id.0).unwrap()
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}
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pub fn get_variable_def(&self, id: VariableId) -> &VarDef {
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self.global.var_defs.get(id.0).unwrap()
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}
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pub fn get_type(&self, name: &str) -> Result<Type, String> {
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match self.resolver.get_symbol_type(name) {
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Some(SymbolType::TypeName(t)) => Ok(t),
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Some(SymbolType::Identifier(_)) => Err("not a type".into()),
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_ => Err("unbounded identifier".into()),
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}
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}
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}
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impl TypeEnum {
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pub fn subst(&self, map: &HashMap<VariableId, Type>) -> TypeEnum {
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match self {
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TypeEnum::TypeVariable(id) => map.get(id).map(|v| v.as_ref()).unwrap_or(self).clone(),
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TypeEnum::ParametricType(id, params) => TypeEnum::ParametricType(
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*id,
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params
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.iter()
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.map(|v| v.as_ref().subst(map).into())
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.collect(),
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),
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_ => self.clone(),
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}
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}
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pub fn get_subst(&self, ctx: &InferenceContext) -> HashMap<VariableId, Type> {
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match self {
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TypeEnum::ParametricType(id, params) => {
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let vars = &ctx.get_parametric_def(*id).params;
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vars.iter()
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.zip(params)
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.map(|(v, p)| (*v, p.as_ref().clone().into()))
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.collect()
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}
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// if this proves to be slow, we can use option type
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_ => HashMap::new(),
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}
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}
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pub fn get_base<'b: 'a, 'a>(&'a self, ctx: &'b InferenceContext) -> Option<&'b TypeDef> {
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match self {
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TypeEnum::PrimitiveType(id) => Some(ctx.get_primitive_def(*id)),
|
||||
TypeEnum::ClassType(id) | TypeEnum::VirtualClassType(id) => {
|
||||
Some(&ctx.get_class_def(*id).base)
|
||||
}
|
||||
TypeEnum::ParametricType(id, _) => Some(&ctx.get_parametric_def(*id).base),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,4 +0,0 @@
|
|||
mod inference_context;
|
||||
mod global_context;
|
||||
pub use inference_context::InferenceContext;
|
||||
pub use global_context::GlobalContext;
|
||||
|
|
@ -1,525 +0,0 @@
|
|||
use super::context::InferenceContext;
|
||||
use super::typedef::{TypeEnum::*, *};
|
||||
use std::collections::HashMap;
|
||||
|
||||
fn find_subst(
|
||||
ctx: &InferenceContext,
|
||||
valuation: &Option<(VariableId, Type)>,
|
||||
sub: &mut HashMap<VariableId, Type>,
|
||||
mut a: Type,
|
||||
mut b: Type,
|
||||
) -> Result<(), String> {
|
||||
// TODO: fix error messages later
|
||||
if let TypeVariable(id) = a.as_ref() {
|
||||
if let Some((assumption_id, t)) = valuation {
|
||||
if assumption_id == id {
|
||||
a = t.clone();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let mut substituted = false;
|
||||
if let TypeVariable(id) = b.as_ref() {
|
||||
if let Some(c) = sub.get(&id) {
|
||||
b = c.clone();
|
||||
substituted = true;
|
||||
}
|
||||
}
|
||||
|
||||
match (a.as_ref(), b.as_ref()) {
|
||||
(BotType, _) => Ok(()),
|
||||
(TypeVariable(id_a), TypeVariable(id_b)) => {
|
||||
if substituted {
|
||||
return if id_a == id_b {
|
||||
Ok(())
|
||||
} else {
|
||||
Err("different variables".to_string())
|
||||
};
|
||||
}
|
||||
let v_a = ctx.get_variable_def(*id_a);
|
||||
let v_b = ctx.get_variable_def(*id_b);
|
||||
if !v_b.bound.is_empty() {
|
||||
if v_a.bound.is_empty() {
|
||||
return Err("unbounded a".to_string());
|
||||
} else {
|
||||
let diff: Vec<_> = v_a
|
||||
.bound
|
||||
.iter()
|
||||
.filter(|x| !v_b.bound.contains(x))
|
||||
.collect();
|
||||
if !diff.is_empty() {
|
||||
return Err("different domain".to_string());
|
||||
}
|
||||
}
|
||||
}
|
||||
sub.insert(*id_b, a.clone());
|
||||
Ok(())
|
||||
}
|
||||
(TypeVariable(id_a), _) => {
|
||||
let v_a = ctx.get_variable_def(*id_a);
|
||||
if v_a.bound.len() == 1 && v_a.bound[0].as_ref() == b.as_ref() {
|
||||
Ok(())
|
||||
} else {
|
||||
Err("different domain".to_string())
|
||||
}
|
||||
}
|
||||
(_, TypeVariable(id_b)) => {
|
||||
let v_b = ctx.get_variable_def(*id_b);
|
||||
if v_b.bound.is_empty() || v_b.bound.contains(&a) {
|
||||
sub.insert(*id_b, a.clone());
|
||||
Ok(())
|
||||
} else {
|
||||
Err("different domain".to_string())
|
||||
}
|
||||
}
|
||||
(_, VirtualClassType(id_b)) => {
|
||||
let mut parents;
|
||||
match a.as_ref() {
|
||||
ClassType(id_a) => {
|
||||
parents = [*id_a].to_vec();
|
||||
}
|
||||
VirtualClassType(id_a) => {
|
||||
parents = [*id_a].to_vec();
|
||||
}
|
||||
_ => {
|
||||
return Err("cannot substitute non-class type into virtual class".to_string());
|
||||
}
|
||||
};
|
||||
while !parents.is_empty() {
|
||||
if *id_b == parents[0] {
|
||||
return Ok(());
|
||||
}
|
||||
let c = ctx.get_class_def(parents.remove(0));
|
||||
parents.extend_from_slice(&c.parents);
|
||||
}
|
||||
Err("not subtype".to_string())
|
||||
}
|
||||
(ParametricType(id_a, param_a), ParametricType(id_b, param_b)) => {
|
||||
if id_a != id_b || param_a.len() != param_b.len() {
|
||||
Err("different parametric types".to_string())
|
||||
} else {
|
||||
for (x, y) in param_a.iter().zip(param_b.iter()) {
|
||||
find_subst(ctx, valuation, sub, x.clone(), y.clone())?;
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
(_, _) => {
|
||||
if a == b {
|
||||
Ok(())
|
||||
} else {
|
||||
Err("not equal".to_string())
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn resolve_call_rec(
|
||||
ctx: &InferenceContext,
|
||||
valuation: &Option<(VariableId, Type)>,
|
||||
obj: Option<Type>,
|
||||
func: &str,
|
||||
args: &[Type],
|
||||
) -> Result<Option<Type>, String> {
|
||||
let mut subst = obj
|
||||
.as_ref()
|
||||
.map(|v| v.get_subst(ctx))
|
||||
.unwrap_or_else(HashMap::new);
|
||||
|
||||
let fun = match &obj {
|
||||
Some(obj) => {
|
||||
let base = match obj.as_ref() {
|
||||
PrimitiveType(id) => &ctx.get_primitive_def(*id),
|
||||
ClassType(id) | VirtualClassType(id) => &ctx.get_class_def(*id).base,
|
||||
ParametricType(id, _) => &ctx.get_parametric_def(*id).base,
|
||||
_ => return Err("not supported".to_string()),
|
||||
};
|
||||
base.methods.get(func)
|
||||
}
|
||||
None => ctx.get_fn_def(func),
|
||||
}
|
||||
.ok_or_else(|| "no such function".to_string())?;
|
||||
|
||||
if args.len() != fun.args.len() {
|
||||
return Err("incorrect parameter number".to_string());
|
||||
}
|
||||
for (a, b) in args.iter().zip(fun.args.iter()) {
|
||||
find_subst(ctx, valuation, &mut subst, a.clone(), b.clone())?;
|
||||
}
|
||||
let result = fun.result.as_ref().map(|v| v.subst(&subst));
|
||||
Ok(result.map(|result| {
|
||||
if let SelfType = result {
|
||||
obj.unwrap()
|
||||
} else {
|
||||
result.into()
|
||||
}
|
||||
}))
|
||||
}
|
||||
|
||||
pub fn resolve_call(
|
||||
ctx: &InferenceContext,
|
||||
obj: Option<Type>,
|
||||
func: &str,
|
||||
args: &[Type],
|
||||
) -> Result<Option<Type>, String> {
|
||||
resolve_call_rec(ctx, &None, obj, func, args)
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use super::super::context::GlobalContext;
|
||||
use super::super::primitives::*;
|
||||
use std::rc::Rc;
|
||||
|
||||
fn get_inference_context(ctx: GlobalContext) -> InferenceContext {
|
||||
InferenceContext::new(ctx, Box::new(|_| Err("unbounded identifier".into())))
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_simple_generic() {
|
||||
let mut ctx = basic_ctx();
|
||||
let v1 = ctx.add_variable(VarDef {
|
||||
name: "V1",
|
||||
bound: vec![ctx.get_primitive(INT32_TYPE), ctx.get_primitive(FLOAT_TYPE)],
|
||||
});
|
||||
let v1 = ctx.get_variable(v1);
|
||||
let v2 = ctx.add_variable(VarDef {
|
||||
name: "V2",
|
||||
bound: vec![
|
||||
ctx.get_primitive(BOOL_TYPE),
|
||||
ctx.get_primitive(INT32_TYPE),
|
||||
ctx.get_primitive(FLOAT_TYPE),
|
||||
],
|
||||
});
|
||||
let v2 = ctx.get_variable(v2);
|
||||
let ctx = get_inference_context(ctx);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "int32", &[ctx.get_primitive(FLOAT_TYPE)]),
|
||||
Ok(Some(ctx.get_primitive(INT32_TYPE)))
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "int32", &[ctx.get_primitive(INT32_TYPE)],),
|
||||
Ok(Some(ctx.get_primitive(INT32_TYPE)))
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "float", &[ctx.get_primitive(INT32_TYPE)]),
|
||||
Ok(Some(ctx.get_primitive(FLOAT_TYPE)))
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "float", &[ctx.get_primitive(BOOL_TYPE)]),
|
||||
Err("different domain".to_string())
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "float", &[]),
|
||||
Err("incorrect parameter number".to_string())
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "float", &[v1]),
|
||||
Ok(Some(ctx.get_primitive(FLOAT_TYPE)))
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "float", &[v2]),
|
||||
Err("different domain".to_string())
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_methods() {
|
||||
let mut ctx = basic_ctx();
|
||||
|
||||
let v0 = ctx.add_variable(VarDef {
|
||||
name: "V0",
|
||||
bound: vec![],
|
||||
});
|
||||
let v0 = ctx.get_variable(v0);
|
||||
|
||||
let int32 = ctx.get_primitive(INT32_TYPE);
|
||||
let int64 = ctx.get_primitive(INT64_TYPE);
|
||||
let ctx = get_inference_context(ctx);
|
||||
|
||||
// simple cases
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, Some(int32.clone()), "__add__", &[int32.clone()]),
|
||||
Ok(Some(int32.clone()))
|
||||
);
|
||||
|
||||
assert_ne!(
|
||||
resolve_call(&ctx, Some(int32.clone()), "__add__", &[int32.clone()]),
|
||||
Ok(Some(int64.clone()))
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, Some(int32), "__add__", &[int64]),
|
||||
Err("not equal".to_string())
|
||||
);
|
||||
|
||||
// with type variables
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, Some(v0.clone()), "__add__", &[v0.clone()]),
|
||||
Err("not supported".into())
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_multi_generic() {
|
||||
let mut ctx = basic_ctx();
|
||||
let v0 = ctx.add_variable(VarDef {
|
||||
name: "V0",
|
||||
bound: vec![],
|
||||
});
|
||||
let v0 = ctx.get_variable(v0);
|
||||
let v1 = ctx.add_variable(VarDef {
|
||||
name: "V1",
|
||||
bound: vec![],
|
||||
});
|
||||
let v1 = ctx.get_variable(v1);
|
||||
let v2 = ctx.add_variable(VarDef {
|
||||
name: "V2",
|
||||
bound: vec![],
|
||||
});
|
||||
let v2 = ctx.get_variable(v2);
|
||||
let v3 = ctx.add_variable(VarDef {
|
||||
name: "V3",
|
||||
bound: vec![],
|
||||
});
|
||||
let v3 = ctx.get_variable(v3);
|
||||
|
||||
ctx.add_fn(
|
||||
"foo",
|
||||
FnDef {
|
||||
args: vec![v0.clone(), v0.clone(), v1.clone()],
|
||||
result: Some(v0.clone()),
|
||||
},
|
||||
);
|
||||
|
||||
ctx.add_fn(
|
||||
"foo1",
|
||||
FnDef {
|
||||
args: vec![ParametricType(TUPLE_TYPE, vec![v0.clone(), v0.clone(), v1]).into()],
|
||||
result: Some(v0),
|
||||
},
|
||||
);
|
||||
let ctx = get_inference_context(ctx);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[v2.clone(), v2.clone(), v2.clone()]),
|
||||
Ok(Some(v2.clone()))
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[v2.clone(), v2.clone(), v3.clone()]),
|
||||
Ok(Some(v2.clone()))
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[v2.clone(), v3.clone(), v3.clone()]),
|
||||
Err("different variables".to_string())
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(
|
||||
&ctx,
|
||||
None,
|
||||
"foo1",
|
||||
&[ParametricType(TUPLE_TYPE, vec![v2.clone(), v2.clone(), v2.clone()]).into()]
|
||||
),
|
||||
Ok(Some(v2.clone()))
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(
|
||||
&ctx,
|
||||
None,
|
||||
"foo1",
|
||||
&[ParametricType(TUPLE_TYPE, vec![v2.clone(), v2.clone(), v3.clone()]).into()]
|
||||
),
|
||||
Ok(Some(v2.clone()))
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(
|
||||
&ctx,
|
||||
None,
|
||||
"foo1",
|
||||
&[ParametricType(TUPLE_TYPE, vec![v2, v3.clone(), v3]).into()]
|
||||
),
|
||||
Err("different variables".to_string())
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_class_generics() {
|
||||
let mut ctx = basic_ctx();
|
||||
|
||||
let list = ctx.get_parametric_def_mut(LIST_TYPE);
|
||||
let t = Rc::new(TypeVariable(list.params[0]));
|
||||
list.base.methods.insert(
|
||||
"head",
|
||||
FnDef {
|
||||
args: vec![],
|
||||
result: Some(t.clone()),
|
||||
},
|
||||
);
|
||||
list.base.methods.insert(
|
||||
"append",
|
||||
FnDef {
|
||||
args: vec![t],
|
||||
result: None,
|
||||
},
|
||||
);
|
||||
|
||||
let v0 = ctx.add_variable(VarDef {
|
||||
name: "V0",
|
||||
bound: vec![],
|
||||
});
|
||||
let v0 = ctx.get_variable(v0);
|
||||
let v1 = ctx.add_variable(VarDef {
|
||||
name: "V1",
|
||||
bound: vec![],
|
||||
});
|
||||
let v1 = ctx.get_variable(v1);
|
||||
let ctx = get_inference_context(ctx);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(
|
||||
&ctx,
|
||||
Some(ParametricType(LIST_TYPE, vec![v0.clone()]).into()),
|
||||
"head",
|
||||
&[]
|
||||
),
|
||||
Ok(Some(v0.clone()))
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(
|
||||
&ctx,
|
||||
Some(ParametricType(LIST_TYPE, vec![v0.clone()]).into()),
|
||||
"append",
|
||||
&[v0.clone()]
|
||||
),
|
||||
Ok(None)
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(
|
||||
&ctx,
|
||||
Some(ParametricType(LIST_TYPE, vec![v0]).into()),
|
||||
"append",
|
||||
&[v1]
|
||||
),
|
||||
Err("different variables".to_string())
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_virtual_class() {
|
||||
let mut ctx = basic_ctx();
|
||||
|
||||
let foo = ctx.add_class(ClassDef {
|
||||
base: TypeDef {
|
||||
name: "Foo",
|
||||
methods: HashMap::new(),
|
||||
fields: HashMap::new(),
|
||||
},
|
||||
parents: vec![],
|
||||
});
|
||||
|
||||
let foo1 = ctx.add_class(ClassDef {
|
||||
base: TypeDef {
|
||||
name: "Foo1",
|
||||
methods: HashMap::new(),
|
||||
fields: HashMap::new(),
|
||||
},
|
||||
parents: vec![foo],
|
||||
});
|
||||
|
||||
let foo2 = ctx.add_class(ClassDef {
|
||||
base: TypeDef {
|
||||
name: "Foo2",
|
||||
methods: HashMap::new(),
|
||||
fields: HashMap::new(),
|
||||
},
|
||||
parents: vec![foo1],
|
||||
});
|
||||
|
||||
let bar = ctx.add_class(ClassDef {
|
||||
base: TypeDef {
|
||||
name: "bar",
|
||||
methods: HashMap::new(),
|
||||
fields: HashMap::new(),
|
||||
},
|
||||
parents: vec![],
|
||||
});
|
||||
|
||||
ctx.add_fn(
|
||||
"foo",
|
||||
FnDef {
|
||||
args: vec![VirtualClassType(foo).into()],
|
||||
result: None,
|
||||
},
|
||||
);
|
||||
ctx.add_fn(
|
||||
"foo1",
|
||||
FnDef {
|
||||
args: vec![VirtualClassType(foo1).into()],
|
||||
result: None,
|
||||
},
|
||||
);
|
||||
let ctx = get_inference_context(ctx);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[ClassType(foo).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[ClassType(foo1).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[ClassType(foo2).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[ClassType(bar).into()]),
|
||||
Err("not subtype".to_string())
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo1", &[ClassType(foo1).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo1", &[ClassType(foo2).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo1", &[ClassType(foo).into()]),
|
||||
Err("not subtype".to_string())
|
||||
);
|
||||
|
||||
// virtual class substitution
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[VirtualClassType(foo).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[VirtualClassType(foo1).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[VirtualClassType(foo2).into()]),
|
||||
Ok(None)
|
||||
);
|
||||
assert_eq!(
|
||||
resolve_call(&ctx, None, "foo", &[VirtualClassType(bar).into()]),
|
||||
Err("not subtype".to_string())
|
||||
);
|
||||
}
|
||||
}
|
||||
|
|
@ -1,7 +1,6 @@
|
|||
pub mod context;
|
||||
pub mod inference_core;
|
||||
mod context;
|
||||
pub mod location;
|
||||
pub mod magic_methods;
|
||||
pub mod primitives;
|
||||
mod magic_methods;
|
||||
mod primitives;
|
||||
pub mod symbol_resolver;
|
||||
pub mod typedef;
|
||||
|
|
|
|||
|
|
@ -1,184 +1,168 @@
|
|||
use super::typedef::{TypeEnum::*, *};
|
||||
use super::context::*;
|
||||
use super::typedef::{TypeEnum::*, *};
|
||||
use std::collections::HashMap;
|
||||
use std::rc::Rc;
|
||||
|
||||
pub const TUPLE_TYPE: ParamId = ParamId(0);
|
||||
pub const LIST_TYPE: ParamId = ParamId(1);
|
||||
pub const FUNC_TYPE: TypeId = TypeId(0);
|
||||
pub const TUPLE_TYPE: TypeId = TypeId(1);
|
||||
pub const LIST_TYPE: TypeId = TypeId(2);
|
||||
pub const VIRTUAL_TYPE: TypeId = TypeId(3);
|
||||
pub const NONE_TYPE: TypeId = TypeId(4);
|
||||
|
||||
pub const BOOL_TYPE: PrimitiveId = PrimitiveId(0);
|
||||
pub const INT32_TYPE: PrimitiveId = PrimitiveId(1);
|
||||
pub const INT64_TYPE: PrimitiveId = PrimitiveId(2);
|
||||
pub const FLOAT_TYPE: PrimitiveId = PrimitiveId(3);
|
||||
pub const BOOL_TYPE: TypeId = TypeId(5);
|
||||
pub const INT32_TYPE: TypeId = TypeId(6);
|
||||
pub const INT64_TYPE: TypeId = TypeId(7);
|
||||
pub const FLOAT_TYPE: TypeId = TypeId(8);
|
||||
|
||||
fn impl_math(def: &mut TypeDef, ty: &Type) {
|
||||
let result = Some(ty.clone());
|
||||
let fun = FnDef {
|
||||
args: vec![ty.clone()],
|
||||
result: result.clone(),
|
||||
};
|
||||
def.methods.insert("__add__", fun.clone());
|
||||
def.methods.insert("__sub__", fun.clone());
|
||||
def.methods.insert("__mul__", fun.clone());
|
||||
def.methods.insert(
|
||||
"__neg__",
|
||||
FnDef {
|
||||
args: vec![],
|
||||
result,
|
||||
},
|
||||
);
|
||||
def.methods.insert(
|
||||
"__truediv__",
|
||||
FnDef {
|
||||
args: vec![ty.clone()],
|
||||
result: Some(PrimitiveType(FLOAT_TYPE).into()),
|
||||
},
|
||||
);
|
||||
def.methods.insert("__floordiv__", fun.clone());
|
||||
def.methods.insert("__mod__", fun.clone());
|
||||
def.methods.insert("__pow__", fun);
|
||||
fn primitive(base: BaseDef) -> TypeDef {
|
||||
TypeDef {
|
||||
base,
|
||||
parents: vec![],
|
||||
params: vec![],
|
||||
}
|
||||
}
|
||||
|
||||
fn impl_bits(def: &mut TypeDef, ty: &Type) {
|
||||
let result = Some(ty.clone());
|
||||
let fun = FnDef {
|
||||
args: vec![PrimitiveType(INT32_TYPE).into()],
|
||||
result,
|
||||
};
|
||||
|
||||
def.methods.insert("__lshift__", fun.clone());
|
||||
def.methods.insert("__rshift__", fun);
|
||||
def.methods.insert(
|
||||
"__xor__",
|
||||
FnDef {
|
||||
args: vec![ty.clone()],
|
||||
result: Some(ty.clone()),
|
||||
},
|
||||
);
|
||||
pub fn get_fn(from: Type, to: Type) -> Type {
|
||||
Rc::new(ClassType(FUNC_TYPE, vec![from, to]))
|
||||
}
|
||||
|
||||
fn impl_eq(def: &mut TypeDef, ty: &Type) {
|
||||
let fun = FnDef {
|
||||
args: vec![ty.clone()],
|
||||
result: Some(PrimitiveType(BOOL_TYPE).into()),
|
||||
};
|
||||
|
||||
def.methods.insert("__eq__", fun.clone());
|
||||
def.methods.insert("__ne__", fun);
|
||||
pub fn get_tuple(types: &[Type]) -> Type {
|
||||
Rc::new(ClassType(TUPLE_TYPE, types.to_vec()))
|
||||
}
|
||||
|
||||
fn impl_order(def: &mut TypeDef, ty: &Type) {
|
||||
let fun = FnDef {
|
||||
args: vec![ty.clone()],
|
||||
result: Some(PrimitiveType(BOOL_TYPE).into()),
|
||||
};
|
||||
pub fn get_list(t: Type) -> Type {
|
||||
Rc::new(ClassType(LIST_TYPE, vec![t]))
|
||||
}
|
||||
|
||||
def.methods.insert("__lt__", fun.clone());
|
||||
def.methods.insert("__gt__", fun.clone());
|
||||
def.methods.insert("__le__", fun.clone());
|
||||
def.methods.insert("__ge__", fun);
|
||||
pub fn get_virtual(t: Type) -> Type {
|
||||
Rc::new(ClassType(VIRTUAL_TYPE, vec![t]))
|
||||
}
|
||||
|
||||
pub fn get_none() -> Type {
|
||||
Rc::new(ClassType(NONE_TYPE, Vec::new()))
|
||||
}
|
||||
|
||||
pub fn get_bool() -> Type {
|
||||
Rc::new(ClassType(BOOL_TYPE, Vec::new()))
|
||||
}
|
||||
pub fn get_int32() -> Type {
|
||||
Rc::new(ClassType(INT32_TYPE, Vec::new()))
|
||||
}
|
||||
|
||||
pub fn get_int64() -> Type {
|
||||
Rc::new(ClassType(INT64_TYPE, Vec::new()))
|
||||
}
|
||||
|
||||
pub fn get_float() -> Type {
|
||||
Rc::new(ClassType(FLOAT_TYPE, Vec::new()))
|
||||
}
|
||||
|
||||
pub fn get_var(id: VariableId) -> Type {
|
||||
Rc::new(TypeVariable(id))
|
||||
}
|
||||
|
||||
fn impl_math(def: &mut BaseDef, ty: &Type) {
|
||||
let fun = get_fn(ty.clone(), ty.clone());
|
||||
def.fields.insert("__add__", fun.clone());
|
||||
def.fields.insert("__sub__", fun.clone());
|
||||
def.fields.insert("__mul__", fun.clone());
|
||||
def.fields.insert("__neg__", get_fn(get_none(), ty.clone()));
|
||||
def.fields
|
||||
.insert("__truediv__", get_fn(ty.clone(), get_float()));
|
||||
def.fields.insert("__floordiv__", fun.clone());
|
||||
def.fields.insert("__mod__", fun.clone());
|
||||
def.fields.insert("__pow__", fun);
|
||||
}
|
||||
|
||||
fn impl_bits(def: &mut BaseDef, ty: &Type) {
|
||||
let fun = get_fn(get_int32(), ty.clone());
|
||||
|
||||
def.fields.insert("__lshift__", fun.clone());
|
||||
def.fields.insert("__rshift__", fun);
|
||||
def.fields.insert("__xor__", get_fn(ty.clone(), ty.clone()));
|
||||
}
|
||||
|
||||
fn impl_eq(def: &mut BaseDef, ty: &Type) {
|
||||
let fun = get_fn(ty.clone(), get_bool());
|
||||
|
||||
def.fields.insert("__eq__", fun.clone());
|
||||
def.fields.insert("__ne__", fun);
|
||||
}
|
||||
|
||||
fn impl_order(def: &mut BaseDef, ty: &Type) {
|
||||
let fun = get_fn(ty.clone(), get_bool());
|
||||
|
||||
def.fields.insert("__lt__", fun.clone());
|
||||
def.fields.insert("__gt__", fun.clone());
|
||||
def.fields.insert("__le__", fun.clone());
|
||||
def.fields.insert("__ge__", fun);
|
||||
}
|
||||
|
||||
pub fn basic_ctx() -> GlobalContext<'static> {
|
||||
let primitives = [
|
||||
TypeDef {
|
||||
let mut ctx = GlobalContext::new(vec![
|
||||
primitive(BaseDef {
|
||||
name: "function",
|
||||
fields: HashMap::new(),
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "tuple",
|
||||
fields: HashMap::new(),
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "list",
|
||||
fields: HashMap::new(),
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "virtual",
|
||||
fields: HashMap::new(),
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "None",
|
||||
fields: HashMap::new(),
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "bool",
|
||||
fields: HashMap::new(),
|
||||
methods: HashMap::new(),
|
||||
},
|
||||
TypeDef {
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "int32",
|
||||
fields: HashMap::new(),
|
||||
methods: HashMap::new(),
|
||||
},
|
||||
TypeDef {
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "int64",
|
||||
fields: HashMap::new(),
|
||||
methods: HashMap::new(),
|
||||
},
|
||||
TypeDef {
|
||||
}),
|
||||
primitive(BaseDef {
|
||||
name: "float",
|
||||
fields: HashMap::new(),
|
||||
methods: HashMap::new(),
|
||||
},
|
||||
]
|
||||
.to_vec();
|
||||
let mut ctx = GlobalContext::new(primitives);
|
||||
}),
|
||||
]);
|
||||
|
||||
let b = ctx.get_primitive(BOOL_TYPE);
|
||||
let b_def = ctx.get_primitive_def_mut(BOOL_TYPE);
|
||||
impl_eq(b_def, &b);
|
||||
let int32 = ctx.get_primitive(INT32_TYPE);
|
||||
let int32_def = ctx.get_primitive_def_mut(INT32_TYPE);
|
||||
let t = ctx.add_variable(VarDef {
|
||||
name: Some("T"),
|
||||
bound: vec![],
|
||||
});
|
||||
ctx.get_type_def_mut(LIST_TYPE).params.push(t);
|
||||
|
||||
let b_def = ctx.get_type_def_mut(BOOL_TYPE);
|
||||
impl_eq(&mut b_def.base, &get_bool());
|
||||
let int32 = get_int32();
|
||||
let int32_def = &mut ctx.get_type_def_mut(INT32_TYPE).base;
|
||||
impl_math(int32_def, &int32);
|
||||
impl_bits(int32_def, &int32);
|
||||
impl_order(int32_def, &int32);
|
||||
impl_eq(int32_def, &int32);
|
||||
let int64 = ctx.get_primitive(INT64_TYPE);
|
||||
let int64_def = ctx.get_primitive_def_mut(INT64_TYPE);
|
||||
let int64 = get_int64();
|
||||
let int64_def = &mut ctx.get_type_def_mut(INT64_TYPE).base;
|
||||
impl_math(int64_def, &int64);
|
||||
impl_bits(int64_def, &int64);
|
||||
impl_order(int64_def, &int64);
|
||||
impl_eq(int64_def, &int64);
|
||||
let float = ctx.get_primitive(FLOAT_TYPE);
|
||||
let float_def = ctx.get_primitive_def_mut(FLOAT_TYPE);
|
||||
let float = get_float();
|
||||
let float_def = &mut ctx.get_type_def_mut(FLOAT_TYPE).base;
|
||||
impl_math(float_def, &float);
|
||||
impl_order(float_def, &float);
|
||||
impl_eq(float_def, &float);
|
||||
|
||||
let t = ctx.add_variable_private(VarDef {
|
||||
name: "T",
|
||||
bound: vec![],
|
||||
});
|
||||
|
||||
ctx.add_parametric(ParametricDef {
|
||||
base: TypeDef {
|
||||
name: "tuple",
|
||||
fields: HashMap::new(),
|
||||
methods: HashMap::new(),
|
||||
},
|
||||
// we have nothing for tuple, so no param def
|
||||
params: vec![],
|
||||
});
|
||||
|
||||
ctx.add_parametric(ParametricDef {
|
||||
base: TypeDef {
|
||||
name: "list",
|
||||
fields: HashMap::new(),
|
||||
methods: HashMap::new(),
|
||||
},
|
||||
params: vec![t],
|
||||
});
|
||||
|
||||
let i = ctx.add_variable_private(VarDef {
|
||||
name: "I",
|
||||
bound: vec![
|
||||
PrimitiveType(INT32_TYPE).into(),
|
||||
PrimitiveType(INT64_TYPE).into(),
|
||||
PrimitiveType(FLOAT_TYPE).into(),
|
||||
],
|
||||
});
|
||||
let args = vec![TypeVariable(i).into()];
|
||||
ctx.add_fn(
|
||||
"int32",
|
||||
FnDef {
|
||||
args: args.clone(),
|
||||
result: Some(PrimitiveType(INT32_TYPE).into()),
|
||||
},
|
||||
);
|
||||
ctx.add_fn(
|
||||
"int64",
|
||||
FnDef {
|
||||
args: args.clone(),
|
||||
result: Some(PrimitiveType(INT64_TYPE).into()),
|
||||
},
|
||||
);
|
||||
ctx.add_fn(
|
||||
"float",
|
||||
FnDef {
|
||||
args,
|
||||
result: Some(PrimitiveType(FLOAT_TYPE).into()),
|
||||
},
|
||||
);
|
||||
|
||||
ctx
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,60 +1,64 @@
|
|||
use std::collections::HashMap;
|
||||
use std::collections::HashSet;
|
||||
use std::rc::Rc;
|
||||
|
||||
#[derive(PartialEq, Eq, Copy, Clone, Hash, Debug)]
|
||||
pub struct PrimitiveId(pub(crate) usize);
|
||||
|
||||
#[derive(PartialEq, Eq, Copy, Clone, Hash, Debug)]
|
||||
pub struct ClassId(pub(crate) usize);
|
||||
|
||||
#[derive(PartialEq, Eq, Copy, Clone, Hash, Debug)]
|
||||
pub struct ParamId(pub(crate) usize);
|
||||
|
||||
#[derive(PartialEq, Eq, Copy, Clone, Hash, Debug)]
|
||||
pub struct VariableId(pub(crate) usize);
|
||||
|
||||
#[derive(PartialEq, Eq, Copy, Clone, Hash, Debug)]
|
||||
pub struct TypeId(pub(crate) usize);
|
||||
|
||||
#[derive(PartialEq, Eq, Clone, Hash, Debug)]
|
||||
pub enum TypeEnum {
|
||||
BotType,
|
||||
SelfType,
|
||||
PrimitiveType(PrimitiveId),
|
||||
ClassType(ClassId),
|
||||
VirtualClassType(ClassId),
|
||||
ParametricType(ParamId, Vec<Rc<TypeEnum>>),
|
||||
ClassType(TypeId, Vec<Rc<TypeEnum>>),
|
||||
TypeVariable(VariableId),
|
||||
}
|
||||
|
||||
pub type Type = Rc<TypeEnum>;
|
||||
|
||||
#[derive(Clone)]
|
||||
pub struct FnDef {
|
||||
// we assume methods first argument to be SelfType,
|
||||
// so the first argument is not contained here
|
||||
pub args: Vec<Type>,
|
||||
pub result: Option<Type>,
|
||||
pub struct BaseDef<'a> {
|
||||
pub name: &'a str,
|
||||
pub fields: HashMap<&'a str, Type>,
|
||||
}
|
||||
|
||||
#[derive(Clone)]
|
||||
pub struct TypeDef<'a> {
|
||||
pub name: &'a str,
|
||||
pub fields: HashMap<&'a str, Type>,
|
||||
pub methods: HashMap<&'a str, FnDef>,
|
||||
}
|
||||
|
||||
#[derive(Clone)]
|
||||
pub struct ClassDef<'a> {
|
||||
pub base: TypeDef<'a>,
|
||||
pub parents: Vec<ClassId>,
|
||||
}
|
||||
|
||||
#[derive(Clone)]
|
||||
pub struct ParametricDef<'a> {
|
||||
pub base: TypeDef<'a>,
|
||||
pub base: BaseDef<'a>,
|
||||
pub parents: Vec<TypeId>,
|
||||
pub params: Vec<VariableId>,
|
||||
}
|
||||
|
||||
#[derive(Clone)]
|
||||
pub struct VarDef<'a> {
|
||||
pub name: &'a str,
|
||||
pub name: Option<&'a str>,
|
||||
pub bound: Vec<Type>,
|
||||
}
|
||||
|
||||
impl TypeEnum {
|
||||
pub fn get_vars(&self, vars: &mut HashSet<VariableId>) {
|
||||
match self {
|
||||
TypeEnum::TypeVariable(id) => {
|
||||
vars.insert(*id);
|
||||
}
|
||||
TypeEnum::ClassType(_, params) => {
|
||||
for t in params.iter() {
|
||||
t.get_vars(vars)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn subst(&self, map: &HashMap<VariableId, Type>) -> Type {
|
||||
match self {
|
||||
TypeEnum::TypeVariable(id) => map
|
||||
.get(id)
|
||||
.cloned()
|
||||
.unwrap_or_else(|| Rc::new(self.clone())),
|
||||
TypeEnum::ClassType(id, params) => Rc::new(TypeEnum::ClassType(
|
||||
*id,
|
||||
params.iter().map(|t| t.subst(map)).collect(),
|
||||
)),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue