704 lines
20 KiB
Rust
704 lines
20 KiB
Rust
use std::{cell::RefCell, collections::HashMap, ops::Deref, sync::Arc};
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use uplc::{ast::Type as UplcType, builtins::DefaultFunction};
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use crate::{
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ast::{Constant, DefinitionLocation, ModuleKind, Span, TypedConstant},
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tipo::fields::FieldMap,
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};
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use self::{environment::Environment, pretty::Printer};
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mod environment;
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pub mod error;
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mod expr;
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pub mod fields;
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mod hydrator;
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mod infer;
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mod pattern;
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mod pipe;
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pub mod pretty;
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#[derive(Debug, Clone, PartialEq)]
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pub enum Type {
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/// A nominal (named) type such as `Int`, `Float`, or a programmer defined
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/// custom type such as `Person`. The type can take other types as
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/// arguments (aka "generics" or "parametric polymorphism").
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///
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/// If the type is defined in the Aiken prelude the `module` field will be
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/// empty, otherwise it will contain the name of the module that
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/// defines the type.
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///
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App {
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public: bool,
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module: String,
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name: String,
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args: Vec<Arc<Type>>,
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},
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/// The type of a function. It takes arguments and returns a value.
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///
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Fn {
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args: Vec<Arc<Type>>,
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ret: Arc<Type>,
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},
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/// A type variable. See the contained `TypeVar` enum for more information.
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///
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Var {
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tipo: Arc<RefCell<TypeVar>>,
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},
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// /// A tuple is an ordered collection of 0 or more values, each of which
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// /// can have a different type, so the `tuple` type is the sum of all the
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// /// contained types.
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// ///
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Tuple {
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elems: Vec<Arc<Type>>,
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},
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}
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impl Type {
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pub fn is_result_constructor(&self) -> bool {
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match self {
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Type::Fn { ret, .. } => ret.is_result(),
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_ => false,
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}
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}
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pub fn is_result(&self) -> bool {
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matches!(self, Self::App { name, module, .. } if "Result" == name && module.is_empty())
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}
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pub fn is_unbound(&self) -> bool {
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matches!(self, Self::Var { tipo } if tipo.borrow().is_unbound())
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}
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pub fn return_type(&self) -> Option<Arc<Self>> {
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match self {
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Self::Fn { ret, .. } => Some(ret.clone()),
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_ => None,
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}
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}
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pub fn function_types(&self) -> Option<(Vec<Arc<Self>>, Arc<Self>)> {
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match self {
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Self::Fn { args, ret, .. } => Some((args.clone(), ret.clone())),
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_ => None,
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}
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}
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pub fn is_nil(&self) -> bool {
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match self {
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Self::App { module, name, .. } if "Nil" == name && module.is_empty() => true,
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Self::Var { tipo } => tipo.borrow().is_nil(),
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_ => false,
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}
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}
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pub fn is_bool(&self) -> bool {
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match self {
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Self::App { module, name, .. } if "Bool" == name && module.is_empty() => true,
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Self::Var { tipo } => tipo.borrow().is_bool(),
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_ => false,
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}
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}
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pub fn is_int(&self) -> bool {
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match self {
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Self::App { module, name, .. } if "Int" == name && module.is_empty() => true,
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Self::Var { tipo } => tipo.borrow().is_int(),
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_ => false,
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}
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}
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pub fn is_bytearray(&self) -> bool {
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match self {
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Self::App { module, name, .. } if "ByteArray" == name && module.is_empty() => true,
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Self::Var { tipo } => tipo.borrow().is_bytearray(),
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_ => false,
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}
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}
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pub fn is_string(&self) -> bool {
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match self {
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Self::App { module, name, .. } if "String" == name && module.is_empty() => true,
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Self::Var { tipo } => tipo.borrow().is_string(),
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_ => false,
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}
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}
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pub fn is_list(&self) -> bool {
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match self {
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Self::App { module, name, .. } if "List" == name && module.is_empty() => true,
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Self::Var { tipo } => tipo.borrow().is_list(),
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_ => false,
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}
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}
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pub fn is_option(&self) -> bool {
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match self {
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Self::App { module, name, .. } if "Option" == name && module.is_empty() => true,
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Self::Var { tipo } => tipo.borrow().is_option(),
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_ => false,
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}
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}
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pub fn is_map(&self) -> bool {
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match self {
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Self::App {
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module, name, args, ..
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} if "List" == name && module.is_empty() => {
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if let Type::Tuple { elems } = &*args[0] {
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elems.len() == 2
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} else if let Type::Var { tipo } = &*args[0] {
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matches!(tipo.borrow().get_uplc_type(), Some(UplcType::Pair(_, _)))
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} else {
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false
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}
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}
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Self::Var { tipo } => tipo.borrow().is_map(),
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_ => false,
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}
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}
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pub fn is_tuple(&self) -> bool {
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matches!(self, Self::Tuple { .. })
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}
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pub fn is_generic(&self) -> bool {
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match self {
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Type::App { args, .. } => {
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let mut is_a_generic = false;
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for arg in args {
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is_a_generic = is_a_generic || arg.is_generic();
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}
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is_a_generic
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}
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Type::Var { tipo } => tipo.borrow().is_generic(),
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Type::Tuple { elems } => {
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let mut is_a_generic = false;
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for elem in elems {
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is_a_generic = is_a_generic || elem.is_generic();
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}
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is_a_generic
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}
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Type::Fn { args, .. } => {
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let mut is_a_generic = false;
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for arg in args {
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is_a_generic = is_a_generic || arg.is_generic();
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}
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is_a_generic
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}
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}
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}
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pub fn get_generic(&self) -> Option<u64> {
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match self {
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Type::Var { tipo } => tipo.borrow().get_generic(),
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_ => None,
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}
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}
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pub fn get_inner_types(&self) -> Vec<Arc<Type>> {
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if self.is_list() {
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match self {
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Self::App { args, .. } => args.clone(),
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Self::Var { tipo } => tipo.borrow().get_inner_type(),
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_ => vec![],
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}
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} else if self.is_tuple() {
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match self {
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Self::Tuple { elems } => elems.to_vec(),
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_ => vec![],
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}
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} else if matches!(self.get_uplc_type(), UplcType::Data) {
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match self {
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Type::App { args, .. } => args.clone(),
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Type::Fn { args, .. } => args.clone(),
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Type::Var { tipo } => tipo.borrow().get_inner_type(),
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_ => unreachable!(),
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}
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} else {
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vec![]
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}
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}
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pub fn get_uplc_type(&self) -> UplcType {
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if self.is_int() {
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UplcType::Integer
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} else if self.is_bytearray() {
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UplcType::ByteString
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} else if self.is_string() {
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UplcType::String
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} else if self.is_bool() {
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UplcType::Bool
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} else if self.is_map() {
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UplcType::List(UplcType::Pair(UplcType::Data.into(), UplcType::Data.into()).into())
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} else if self.is_list() {
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UplcType::List(UplcType::Data.into())
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} else if self.is_tuple() {
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match self {
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Self::Tuple { elems } => {
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if elems.len() == 2 {
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UplcType::Pair(UplcType::Data.into(), UplcType::Data.into())
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} else {
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UplcType::List(UplcType::Data.into())
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}
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}
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_ => todo!(),
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}
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} else {
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UplcType::Data
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}
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}
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/// Get the args for the type if the type is a specific `Type::App`.
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/// Returns None if the type is not a `Type::App` or is an incorrect `Type:App`
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///
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/// This function is currently only used for finding the `List` type.
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pub fn get_app_args(
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&self,
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public: bool,
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module: &str,
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name: &str,
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arity: usize,
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environment: &mut Environment<'_>,
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) -> Option<Vec<Arc<Self>>> {
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match self {
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Self::App {
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module: m,
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name: n,
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args,
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..
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} => {
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if module == m && name == n && args.len() == arity {
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Some(args.clone())
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} else {
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None
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}
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}
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Self::Var { tipo } => {
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let args: Vec<_> = match tipo.borrow().deref() {
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TypeVar::Link { tipo } => {
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return tipo.get_app_args(public, module, name, arity, environment);
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}
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TypeVar::Unbound { .. } => {
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(0..arity).map(|_| environment.new_unbound_var()).collect()
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}
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TypeVar::Generic { .. } => return None,
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};
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// We are an unbound type variable! So convert us to a type link
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// to the desired type.
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*tipo.borrow_mut() = TypeVar::Link {
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tipo: Arc::new(Self::App {
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name: name.to_string(),
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module: module.to_owned(),
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args: args.clone(),
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public,
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}),
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};
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Some(args)
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}
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_ => None,
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}
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}
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pub fn find_private_type(&self) -> Option<Self> {
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match self {
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Self::App { public: false, .. } => Some(self.clone()),
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Self::App { args, .. } => args.iter().find_map(|t| t.find_private_type()),
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Self::Tuple { elems, .. } => elems.iter().find_map(|t| t.find_private_type()),
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Self::Fn { ret, args, .. } => ret
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.find_private_type()
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.or_else(|| args.iter().find_map(|t| t.find_private_type())),
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Self::Var { tipo, .. } => match tipo.borrow().deref() {
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TypeVar::Unbound { .. } => None,
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TypeVar::Generic { .. } => None,
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TypeVar::Link { tipo, .. } => tipo.find_private_type(),
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},
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}
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}
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pub fn fn_arity(&self) -> Option<usize> {
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match self {
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Self::Fn { args, .. } => Some(args.len()),
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_ => None,
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}
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}
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pub fn to_pretty(&self, indent: usize) -> String {
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Printer::new().pretty_print(self, indent)
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}
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pub fn to_pretty_with_names(&self, names: HashMap<u64, String>, indent: usize) -> String {
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let mut printer = Printer::new();
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printer.with_names(names);
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printer.pretty_print(self, indent)
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}
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}
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#[derive(Debug, Clone, PartialEq)]
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pub enum TypeVar {
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/// Unbound is an unbound variable. It is one specific type but we don't
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/// know what yet in the inference process. It has a unique id which can be used to
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/// identify if two unbound variable Rust values are the same Aiken type variable
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/// instance or not.
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///
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Unbound { id: u64 },
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/// Link is type variable where it was an unbound variable but we worked out
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/// that it is some other type and now we point to that one.
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///
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Link { tipo: Arc<Type> },
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/// A Generic variable stands in for any possible type and cannot be
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/// specialised to any one type
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///
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/// # Example
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///
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/// ```aiken
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/// type Cat(a) {
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/// Cat(name: a)
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/// }
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/// // a is TypeVar::Generic
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/// ```
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///
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Generic { id: u64 },
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}
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impl TypeVar {
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pub fn is_unbound(&self) -> bool {
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matches!(self, Self::Unbound { .. })
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}
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pub fn is_nil(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_nil(),
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_ => false,
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}
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}
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pub fn is_bool(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_bool(),
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_ => false,
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}
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}
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pub fn is_int(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_int(),
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_ => false,
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}
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}
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pub fn is_bytearray(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_bytearray(),
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_ => false,
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}
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}
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pub fn is_string(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_string(),
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_ => false,
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}
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}
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pub fn is_list(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_list(),
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_ => false,
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}
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}
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pub fn is_option(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_option(),
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_ => false,
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}
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}
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pub fn is_map(&self) -> bool {
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match self {
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Self::Link { tipo } => tipo.is_map(),
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_ => false,
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}
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}
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pub fn is_generic(&self) -> bool {
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match self {
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TypeVar::Generic { .. } => true,
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TypeVar::Link { tipo } => tipo.is_generic(),
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_ => false,
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}
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}
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pub fn get_generic(&self) -> Option<u64> {
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match self {
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TypeVar::Generic { id } => Some(*id),
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TypeVar::Link { tipo } => tipo.get_generic(),
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_ => None,
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}
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}
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pub fn get_inner_type(&self) -> Vec<Arc<Type>> {
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match self {
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Self::Link { tipo } => tipo.get_inner_types(),
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_ => vec![],
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}
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}
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pub fn get_uplc_type(&self) -> Option<UplcType> {
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match self {
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Self::Link { tipo } => Some(tipo.get_uplc_type()),
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_ => None,
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}
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}
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}
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#[derive(Debug, Clone, PartialEq)]
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pub struct ValueConstructor {
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pub public: bool,
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pub variant: ValueConstructorVariant,
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pub tipo: Arc<Type>,
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}
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impl ValueConstructor {
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pub fn public(tipo: Arc<Type>, variant: ValueConstructorVariant) -> ValueConstructor {
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ValueConstructor {
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public: true,
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variant,
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tipo,
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}
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}
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fn field_map(&self) -> Option<&FieldMap> {
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match &self.variant {
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ValueConstructorVariant::ModuleFn { field_map, .. }
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| ValueConstructorVariant::Record { field_map, .. } => field_map.as_ref(),
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_ => None,
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}
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}
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pub fn is_local_variable(&self) -> bool {
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self.variant.is_local_variable()
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}
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pub fn definition_location(&self) -> DefinitionLocation<'_> {
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match &self.variant {
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ValueConstructorVariant::Record {
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module, location, ..
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}
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| ValueConstructorVariant::ModuleConstant {
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location, module, ..
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} => DefinitionLocation {
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module: Some(module.as_str()),
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span: *location,
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},
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ValueConstructorVariant::ModuleFn { location, .. }
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| ValueConstructorVariant::LocalVariable { location } => DefinitionLocation {
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module: None,
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span: *location,
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},
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}
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}
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}
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|
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#[derive(Debug, Clone, PartialEq)]
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pub enum ValueConstructorVariant {
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/// A locally defined variable or function parameter
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LocalVariable { location: Span },
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/// A module constant
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ModuleConstant {
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location: Span,
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module: String,
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literal: Constant<Arc<Type>, String>,
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},
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/// A function belonging to the module
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ModuleFn {
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name: String,
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field_map: Option<FieldMap>,
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module: String,
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arity: usize,
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location: Span,
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builtin: Option<DefaultFunction>,
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},
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/// A constructor for a custom type
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Record {
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name: String,
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arity: usize,
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field_map: Option<FieldMap>,
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location: Span,
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module: String,
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constructors_count: u16,
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},
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}
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|
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impl ValueConstructorVariant {
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fn to_module_value_constructor(
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&self,
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tipo: Arc<Type>,
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module_name: &str,
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function_name: &str,
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) -> ModuleValueConstructor {
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match self {
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Self::Record {
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name,
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arity,
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field_map,
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location,
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..
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} => ModuleValueConstructor::Record {
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name: name.clone(),
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field_map: field_map.clone(),
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arity: *arity,
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tipo,
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location: *location,
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},
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|
|
// TODO: remove this clone with an rc clone
|
|
Self::ModuleConstant {
|
|
literal, location, ..
|
|
} => ModuleValueConstructor::Constant {
|
|
literal: literal.clone(),
|
|
location: *location,
|
|
},
|
|
|
|
Self::LocalVariable { location, .. } => ModuleValueConstructor::Fn {
|
|
name: function_name.to_string(),
|
|
module: module_name.to_string(),
|
|
location: *location,
|
|
},
|
|
|
|
Self::ModuleFn {
|
|
name,
|
|
module,
|
|
location,
|
|
..
|
|
} => ModuleValueConstructor::Fn {
|
|
name: name.clone(),
|
|
module: module.clone(),
|
|
location: *location,
|
|
},
|
|
}
|
|
}
|
|
|
|
pub fn location(&self) -> Span {
|
|
match self {
|
|
ValueConstructorVariant::LocalVariable { location }
|
|
| ValueConstructorVariant::ModuleConstant { location, .. }
|
|
| ValueConstructorVariant::ModuleFn { location, .. }
|
|
| ValueConstructorVariant::Record { location, .. } => *location,
|
|
}
|
|
}
|
|
|
|
/// Returns `true` if the variant is [`LocalVariable`].
|
|
pub fn is_local_variable(&self) -> bool {
|
|
matches!(self, Self::LocalVariable { .. })
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub struct TypeInfo {
|
|
pub name: String,
|
|
pub kind: ModuleKind,
|
|
pub package: String,
|
|
pub types: HashMap<String, TypeConstructor>,
|
|
pub types_constructors: HashMap<String, Vec<String>>,
|
|
pub values: HashMap<String, ValueConstructor>,
|
|
pub accessors: HashMap<String, AccessorsMap>,
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub struct TypeConstructor {
|
|
pub public: bool,
|
|
pub location: Span,
|
|
pub module: String,
|
|
pub parameters: Vec<Arc<Type>>,
|
|
pub tipo: Arc<Type>,
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub struct AccessorsMap {
|
|
pub public: bool,
|
|
pub tipo: Arc<Type>,
|
|
pub accessors: HashMap<String, RecordAccessor>,
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub struct RecordAccessor {
|
|
// TODO: smaller int. Doesn't need to be this big
|
|
pub index: u64,
|
|
pub label: String,
|
|
pub tipo: Arc<Type>,
|
|
}
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub enum PatternConstructor {
|
|
Record {
|
|
name: String,
|
|
field_map: Option<FieldMap>,
|
|
},
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub enum ModuleValueConstructor {
|
|
Record {
|
|
name: String,
|
|
arity: usize,
|
|
tipo: Arc<Type>,
|
|
field_map: Option<FieldMap>,
|
|
location: Span,
|
|
},
|
|
|
|
Fn {
|
|
location: Span,
|
|
/// The name of the module and the function
|
|
/// Typically this will be the module that this constructor belongs to
|
|
/// and the name that was used for the function. However it could also
|
|
/// point to some other module and function when this is an `external fn`.
|
|
///
|
|
/// This function has module "themodule" and name "wibble"
|
|
/// pub fn wibble() { Nil }
|
|
///
|
|
/// This function has module "other" and name "whoop"
|
|
/// pub external fn wibble() -> Nil =
|
|
/// "other" "whoop"
|
|
///
|
|
module: String,
|
|
name: String,
|
|
},
|
|
|
|
Constant {
|
|
literal: TypedConstant,
|
|
location: Span,
|
|
},
|
|
}
|
|
|
|
impl ModuleValueConstructor {
|
|
pub fn location(&self) -> Span {
|
|
match self {
|
|
ModuleValueConstructor::Fn { location, .. }
|
|
| ModuleValueConstructor::Record { location, .. }
|
|
| ModuleValueConstructor::Constant { location, .. } => *location,
|
|
}
|
|
}
|
|
}
|