forked from M-Labs/nac3
527 lines
19 KiB
Rust
527 lines
19 KiB
Rust
use std::fmt::Debug;
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use std::sync::Arc;
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use std::{collections::HashMap, fmt::Display};
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use std::rc::Rc;
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use crate::typecheck::typedef::TypeEnum;
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use crate::{
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codegen::CodeGenContext,
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toplevel::{DefinitionId, TopLevelDef, type_annotation::TypeAnnotation},
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};
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use crate::{
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codegen::CodeGenerator,
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typecheck::{
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type_inferencer::PrimitiveStore,
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typedef::{Type, Unifier},
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},
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};
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use inkwell::values::{BasicValueEnum, FloatValue, IntValue, PointerValue, StructValue};
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use itertools::{chain, izip};
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use nac3parser::ast::{Constant, Expr, Location, StrRef};
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use parking_lot::RwLock;
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#[derive(Clone, PartialEq, Debug)]
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pub enum SymbolValue {
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I32(i32),
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I64(i64),
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U32(u32),
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U64(u64),
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Str(String),
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Double(f64),
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Bool(bool),
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Tuple(Vec<SymbolValue>),
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OptionSome(Box<SymbolValue>),
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OptionNone,
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}
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impl SymbolValue {
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/// Creates a [SymbolValue] from a [Constant].
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///
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/// * `constant` - The constant to create the value from.
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/// * `expected_ty` - The expected type of the [SymbolValue].
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pub fn from_constant(
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constant: &Constant,
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expected_ty: Type,
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primitives: &PrimitiveStore,
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unifier: &mut Unifier
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) -> Result<Self, String> {
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match constant {
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Constant::None => {
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if unifier.unioned(expected_ty, primitives.option) {
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Ok(SymbolValue::OptionNone)
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} else {
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Err(format!("Expected {:?}, but got Option", expected_ty))
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}
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}
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Constant::Bool(b) => {
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if unifier.unioned(expected_ty, primitives.bool) {
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Ok(SymbolValue::Bool(*b))
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} else {
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Err(format!("Expected {:?}, but got bool", expected_ty))
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}
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}
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Constant::Str(s) => {
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if unifier.unioned(expected_ty, primitives.str) {
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Ok(SymbolValue::Str(s.to_string()))
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} else {
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Err(format!("Expected {:?}, but got str", expected_ty))
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}
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},
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Constant::Int(i) => {
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if unifier.unioned(expected_ty, primitives.int32) {
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i32::try_from(*i)
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.map(|val| SymbolValue::I32(val))
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.map_err(|e| e.to_string())
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} else if unifier.unioned(expected_ty, primitives.int64) {
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i64::try_from(*i)
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.map(|val| SymbolValue::I64(val))
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.map_err(|e| e.to_string())
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} else if unifier.unioned(expected_ty, primitives.uint32) {
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u32::try_from(*i)
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.map(|val| SymbolValue::U32(val))
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.map_err(|e| e.to_string())
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} else if unifier.unioned(expected_ty, primitives.uint64) {
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u64::try_from(*i)
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.map(|val| SymbolValue::U64(val))
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.map_err(|e| e.to_string())
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} else {
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Err(format!("Expected {}, but got int", unifier.stringify(expected_ty)))
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}
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}
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Constant::Tuple(t) => {
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let expected_ty = unifier.get_ty(expected_ty);
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let TypeEnum::TTuple { ty } = expected_ty.as_ref() else {
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return Err(format!("Expected {:?}, but got Tuple", expected_ty.get_type_name()))
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};
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assert_eq!(ty.len(), t.len());
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let elems = t.into_iter()
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.zip(ty)
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.map(|(constant, ty)| Self::from_constant(constant, *ty, primitives, unifier))
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.collect::<Result<Vec<SymbolValue>, _>>()?;
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Ok(SymbolValue::Tuple(elems))
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}
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Constant::Float(f) => {
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if unifier.unioned(expected_ty, primitives.float) {
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Ok(SymbolValue::Double(*f))
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} else {
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Err(format!("Expected {:?}, but got float", expected_ty))
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}
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},
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_ => Err(format!("Unsupported value type {:?}", constant)),
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}
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}
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/// Returns the [Type] representing the data type of this value.
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pub fn get_type(&self, primitives: &PrimitiveStore, unifier: &mut Unifier) -> Type {
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match self {
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SymbolValue::I32(_) => primitives.int32,
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SymbolValue::I64(_) => primitives.int64,
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SymbolValue::U32(_) => primitives.uint32,
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SymbolValue::U64(_) => primitives.uint64,
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SymbolValue::Str(_) => primitives.str,
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SymbolValue::Double(_) => primitives.float,
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SymbolValue::Bool(_) => primitives.bool,
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SymbolValue::Tuple(vs) => {
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let vs_tys = vs
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.iter()
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.map(|v| v.get_type(primitives, unifier))
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.collect::<Vec<_>>();
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unifier.add_ty(TypeEnum::TTuple {
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ty: vs_tys,
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})
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}
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SymbolValue::OptionSome(_) => primitives.option,
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SymbolValue::OptionNone => primitives.option,
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}
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}
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/// Returns the [TypeAnnotation] representing the data type of this value.
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pub fn get_type_annotation(&self, primitives: &PrimitiveStore, unifier: &mut Unifier) -> TypeAnnotation {
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match self {
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SymbolValue::Bool(..) => TypeAnnotation::Primitive(primitives.bool),
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SymbolValue::Double(..) => TypeAnnotation::Primitive(primitives.float),
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SymbolValue::I32(..) => TypeAnnotation::Primitive(primitives.int32),
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SymbolValue::I64(..) => TypeAnnotation::Primitive(primitives.int64),
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SymbolValue::U32(..) => TypeAnnotation::Primitive(primitives.uint32),
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SymbolValue::U64(..) => TypeAnnotation::Primitive(primitives.uint64),
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SymbolValue::Str(..) => TypeAnnotation::Primitive(primitives.str),
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SymbolValue::Tuple(vs) => {
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let vs_tys = vs
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.iter()
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.map(|v| v.get_type_annotation(primitives, unifier))
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.collect::<Vec<_>>();
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TypeAnnotation::Tuple(vs_tys)
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}
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SymbolValue::OptionNone => TypeAnnotation::CustomClass {
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id: primitives.option.get_obj_id(unifier),
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params: Default::default(),
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},
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SymbolValue::OptionSome(v) => {
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let ty = v.get_type_annotation(primitives, unifier);
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TypeAnnotation::CustomClass {
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id: primitives.option.get_obj_id(unifier),
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params: vec![ty],
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}
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}
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}
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}
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/// Returns the [TypeEnum] representing the data type of this value.
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pub fn get_type_enum(&self, primitives: &PrimitiveStore, unifier: &mut Unifier) -> Rc<TypeEnum> {
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let ty = self.get_type(primitives, unifier);
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unifier.get_ty(ty)
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}
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}
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impl Display for SymbolValue {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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SymbolValue::I32(i) => write!(f, "{}", i),
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SymbolValue::I64(i) => write!(f, "int64({})", i),
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SymbolValue::U32(i) => write!(f, "uint32({})", i),
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SymbolValue::U64(i) => write!(f, "uint64({})", i),
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SymbolValue::Str(s) => write!(f, "\"{}\"", s),
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SymbolValue::Double(d) => write!(f, "{}", d),
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SymbolValue::Bool(b) => {
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if *b {
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write!(f, "True")
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} else {
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write!(f, "False")
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}
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}
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SymbolValue::Tuple(t) => {
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write!(f, "({})", t.iter().map(|v| format!("{}", v)).collect::<Vec<_>>().join(", "))
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}
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SymbolValue::OptionSome(v) => write!(f, "Some({})", v),
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SymbolValue::OptionNone => write!(f, "none"),
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}
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}
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}
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pub trait StaticValue {
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/// Returns a unique identifier for this value.
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fn get_unique_identifier(&self) -> u64;
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fn get_const_obj<'ctx, 'a>(
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&self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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generator: &mut dyn CodeGenerator,
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) -> BasicValueEnum<'ctx>;
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/// Converts this value to a LLVM [BasicValueEnum].
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fn to_basic_value_enum<'ctx, 'a>(
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&self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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generator: &mut dyn CodeGenerator,
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expected_ty: Type,
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) -> Result<BasicValueEnum<'ctx>, String>;
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/// Returns a field within this value.
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fn get_field<'ctx, 'a>(
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&self,
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name: StrRef,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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) -> Option<ValueEnum<'ctx>>;
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/// Returns a single element of this tuple.
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fn get_tuple_element<'ctx>(&self, index: u32) -> Option<ValueEnum<'ctx>>;
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}
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#[derive(Clone)]
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pub enum ValueEnum<'ctx> {
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Static(Arc<dyn StaticValue + Send + Sync>),
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Dynamic(BasicValueEnum<'ctx>),
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}
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impl<'ctx> From<BasicValueEnum<'ctx>> for ValueEnum<'ctx> {
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fn from(v: BasicValueEnum<'ctx>) -> Self {
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ValueEnum::Dynamic(v)
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}
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}
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impl<'ctx> From<PointerValue<'ctx>> for ValueEnum<'ctx> {
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fn from(v: PointerValue<'ctx>) -> Self {
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ValueEnum::Dynamic(v.into())
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}
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}
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impl<'ctx> From<IntValue<'ctx>> for ValueEnum<'ctx> {
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fn from(v: IntValue<'ctx>) -> Self {
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ValueEnum::Dynamic(v.into())
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}
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}
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impl<'ctx> From<FloatValue<'ctx>> for ValueEnum<'ctx> {
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fn from(v: FloatValue<'ctx>) -> Self {
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ValueEnum::Dynamic(v.into())
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}
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}
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impl<'ctx> From<StructValue<'ctx>> for ValueEnum<'ctx> {
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fn from(v: StructValue<'ctx>) -> Self {
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ValueEnum::Dynamic(v.into())
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}
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}
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impl<'ctx> ValueEnum<'ctx> {
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pub fn to_basic_value_enum<'a>(
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self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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generator: &mut dyn CodeGenerator,
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expected_ty: Type,
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) -> Result<BasicValueEnum<'ctx>, String> {
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match self {
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ValueEnum::Static(v) => v.to_basic_value_enum(ctx, generator, expected_ty),
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ValueEnum::Dynamic(v) => Ok(v),
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}
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}
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}
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pub trait SymbolResolver {
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// get type of type variable identifier or top-level function type
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fn get_symbol_type(
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&self,
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unifier: &mut Unifier,
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top_level_defs: &[Arc<RwLock<TopLevelDef>>],
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primitives: &PrimitiveStore,
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str: StrRef,
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) -> Result<Type, String>;
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// get the top-level definition of identifiers
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fn get_identifier_def(&self, str: StrRef) -> Result<DefinitionId, String>;
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fn get_symbol_value<'ctx, 'a>(
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&self,
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str: StrRef,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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) -> Option<ValueEnum<'ctx>>;
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fn get_default_param_value(&self, expr: &nac3parser::ast::Expr) -> Option<SymbolValue>;
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fn get_string_id(&self, s: &str) -> i32;
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fn get_exception_id(&self, tyid: usize) -> usize;
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fn handle_deferred_eval(
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&self,
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_unifier: &mut Unifier,
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_top_level_defs: &[Arc<RwLock<TopLevelDef>>],
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_primitives: &PrimitiveStore
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) -> Result<(), String> {
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Ok(())
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}
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}
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thread_local! {
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static IDENTIFIER_ID: [StrRef; 11] = [
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"int32".into(),
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"int64".into(),
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"float".into(),
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"bool".into(),
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"virtual".into(),
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"list".into(),
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"tuple".into(),
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"str".into(),
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"Exception".into(),
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"uint32".into(),
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"uint64".into(),
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];
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}
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// convert type annotation into type
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pub fn parse_type_annotation<T>(
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resolver: &dyn SymbolResolver,
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top_level_defs: &[Arc<RwLock<TopLevelDef>>],
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unifier: &mut Unifier,
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primitives: &PrimitiveStore,
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expr: &Expr<T>,
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) -> Result<Type, String> {
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use nac3parser::ast::ExprKind::*;
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let ids = IDENTIFIER_ID.with(|ids| *ids);
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let int32_id = ids[0];
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let int64_id = ids[1];
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let float_id = ids[2];
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let bool_id = ids[3];
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let virtual_id = ids[4];
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let list_id = ids[5];
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let tuple_id = ids[6];
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let str_id = ids[7];
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let exn_id = ids[8];
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let uint32_id = ids[9];
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let uint64_id = ids[10];
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let name_handling = |id: &StrRef, loc: Location, unifier: &mut Unifier| {
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if *id == int32_id {
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Ok(primitives.int32)
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} else if *id == int64_id {
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Ok(primitives.int64)
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} else if *id == uint32_id {
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Ok(primitives.uint32)
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} else if *id == uint64_id {
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Ok(primitives.uint64)
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} else if *id == float_id {
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Ok(primitives.float)
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} else if *id == bool_id {
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Ok(primitives.bool)
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} else if *id == str_id {
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Ok(primitives.str)
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} else if *id == exn_id {
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Ok(primitives.exception)
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} else {
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let obj_id = resolver.get_identifier_def(*id);
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match obj_id {
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Ok(obj_id) => {
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let def = top_level_defs[obj_id.0].read();
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if let TopLevelDef::Class { fields, methods, type_vars, .. } = &*def {
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if !type_vars.is_empty() {
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return Err(format!(
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"Unexpected number of type parameters: expected {} but got 0",
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type_vars.len()
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));
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}
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let fields = chain(
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fields.iter().map(|(k, v, m)| (*k, (*v, *m))),
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methods.iter().map(|(k, v, _)| (*k, (*v, false))),
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)
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.collect();
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Ok(unifier.add_ty(TypeEnum::TObj {
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obj_id,
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fields,
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params: Default::default(),
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}))
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} else {
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Err(format!("Cannot use function name as type at {}", loc))
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}
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}
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Err(_) => {
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let ty = resolver
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.get_symbol_type(unifier, top_level_defs, primitives, *id)
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.map_err(|e| format!("Unknown type annotation at {}: {}", loc, e))?;
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if let TypeEnum::TVar { .. } = &*unifier.get_ty(ty) {
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Ok(ty)
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} else {
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Err(format!("Unknown type annotation {} at {}", id, loc))
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}
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}
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}
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}
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};
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let subscript_name_handle = |id: &StrRef, slice: &Expr<T>, unifier: &mut Unifier| {
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if *id == virtual_id {
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let ty = parse_type_annotation(resolver, top_level_defs, unifier, primitives, slice)?;
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Ok(unifier.add_ty(TypeEnum::TVirtual { ty }))
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} else if *id == list_id {
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let ty = parse_type_annotation(resolver, top_level_defs, unifier, primitives, slice)?;
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Ok(unifier.add_ty(TypeEnum::TList { ty }))
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} else if *id == tuple_id {
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if let Tuple { elts, .. } = &slice.node {
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let ty = elts
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.iter()
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.map(|elt| {
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parse_type_annotation(resolver, top_level_defs, unifier, primitives, elt)
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})
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.collect::<Result<Vec<_>, _>>()?;
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Ok(unifier.add_ty(TypeEnum::TTuple { ty }))
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} else {
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Err("Expected multiple elements for tuple".into())
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}
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} else {
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let types = if let Tuple { elts, .. } = &slice.node {
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elts.iter()
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.map(|v| {
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parse_type_annotation(resolver, top_level_defs, unifier, primitives, v)
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})
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.collect::<Result<Vec<_>, _>>()?
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} else {
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vec![parse_type_annotation(resolver, top_level_defs, unifier, primitives, slice)?]
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};
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let obj_id = resolver.get_identifier_def(*id)?;
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let def = top_level_defs[obj_id.0].read();
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if let TopLevelDef::Class { fields, methods, type_vars, .. } = &*def {
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if types.len() != type_vars.len() {
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return Err(format!(
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"Unexpected number of type parameters: expected {} but got {}",
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type_vars.len(),
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types.len()
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));
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}
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let mut subst = HashMap::new();
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for (var, ty) in izip!(type_vars.iter(), types.iter()) {
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let id = if let TypeEnum::TVar { id, .. } = &*unifier.get_ty(*var) {
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*id
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} else {
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unreachable!()
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};
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subst.insert(id, *ty);
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}
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let mut fields = fields
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.iter()
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.map(|(attr, ty, is_mutable)| {
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let ty = unifier.subst(*ty, &subst).unwrap_or(*ty);
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(*attr, (ty, *is_mutable))
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})
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.collect::<HashMap<_, _>>();
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fields.extend(methods.iter().map(|(attr, ty, _)| {
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let ty = unifier.subst(*ty, &subst).unwrap_or(*ty);
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(*attr, (ty, false))
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}));
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Ok(unifier.add_ty(TypeEnum::TObj { obj_id, fields, params: subst }))
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} else {
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Err("Cannot use function name as type".into())
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}
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}
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};
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match &expr.node {
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Name { id, .. } => name_handling(id, expr.location, unifier),
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Subscript { value, slice, .. } => {
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if let Name { id, .. } = &value.node {
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subscript_name_handle(id, slice, unifier)
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} else {
|
|
Err(format!("unsupported type expression at {}", expr.location))
|
|
}
|
|
}
|
|
_ => Err(format!("unsupported type expression at {}", expr.location)),
|
|
}
|
|
}
|
|
|
|
impl dyn SymbolResolver + Send + Sync {
|
|
pub fn parse_type_annotation<T>(
|
|
&self,
|
|
top_level_defs: &[Arc<RwLock<TopLevelDef>>],
|
|
unifier: &mut Unifier,
|
|
primitives: &PrimitiveStore,
|
|
expr: &Expr<T>,
|
|
) -> Result<Type, String> {
|
|
parse_type_annotation(self, top_level_defs, unifier, primitives, expr)
|
|
}
|
|
|
|
pub fn get_type_name(
|
|
&self,
|
|
top_level_defs: &[Arc<RwLock<TopLevelDef>>],
|
|
unifier: &mut Unifier,
|
|
ty: Type,
|
|
) -> String {
|
|
unifier.internal_stringify(
|
|
ty,
|
|
&mut |id| {
|
|
if let TopLevelDef::Class { name, .. } = &*top_level_defs[id].read() {
|
|
name.to_string()
|
|
} else {
|
|
unreachable!("expected class definition")
|
|
}
|
|
},
|
|
&mut |id| format!("typevar{}", id),
|
|
&mut None,
|
|
)
|
|
}
|
|
}
|
|
|
|
impl Debug for dyn SymbolResolver + Send + Sync {
|
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
|
write!(f, "")
|
|
}
|
|
}
|