start work on type resolver

This commit is contained in:
Schrottkatze 2023-11-21 12:44:20 +01:00
parent b07eb248f1
commit c3db966765
3 changed files with 152 additions and 12 deletions

View file

@ -18,6 +18,18 @@ impl<'a> Command<'a> {
.as_ref()
.map(|def| TypeDef::from_internal(self.namespace, def))
}
// get a count of inputs required
pub fn input_count(&self) -> usize {
self.namespace.commands.borrow()[self.id]
.input
.as_ref()
.map(|inputs| match inputs {
InternalTypeDef::Single(_) => 1,
InternalTypeDef::List(list) => list.len(),
InternalTypeDef::Record(rec) => rec.len(),
})
.unwrap_or(0)
}
pub fn get_output_types(&self) -> Option<TypeDef> {
self.namespace.commands.borrow()[self.id]
.output

View file

@ -101,6 +101,18 @@ impl Debug for TypeDef<'_> {
}
}
impl<'a> From<Type<'a>> for TypeDef<'a> {
fn from(value: Type<'a>) -> Self {
TypeDef::Type(value)
}
}
impl<'a> From<Trait<'a>> for TypeDef<'a> {
fn from(value: Trait<'a>) -> Self {
TypeDef::Trait(value)
}
}
pub(super) enum InternalTypeDef {
Single(TypeNamespaceId),
List(Vec<InternalTypeDef>),

View file

@ -1,9 +1,15 @@
use core::panic;
use std::process::CommandEnvs;
use crate::{
builtins::{TYPE_FLOAT, TYPE_INTEGER, TYPE_STRING},
error::Errors,
namespace::{command::Command, r#type::Type, GlobalNamespace},
namespace::{
command::{self, Command},
r#type::Type,
typedef::TypeDef,
GlobalNamespace,
},
syntax::{CommandPart, CommandPartKind, PipelineElement, PipelineElementKind},
Span,
};
@ -15,15 +21,59 @@ pub struct Expr<'a> {
span: Span,
}
impl<'a> Expr<'a> {
fn try_find_concrete(&'a self, ns: &'a GlobalNamespace) -> IoTypes<'a> {
let Self { ref kind, .. } = self;
kind.try_find_concrete(ns)
}
fn get_input_typedef(&'a self) -> Option<TypeDef<'a>> {
match &self.kind {
ExprKind::Command(c) => c.command.get_input_types(),
ExprKind::Literal(_) => None,
}
}
}
#[derive(Debug)]
pub enum ExprKind<'a> {
Command {
command: Command<'a>,
args: Vec<Expr<'a>>,
},
Command(CommandExpr<'a>),
Literal(LiteralKind),
}
impl<'a> ExprKind<'a> {
fn try_find_concrete(&'a self, ns: &'a GlobalNamespace) -> IoTypes<'a> {
match self {
ExprKind::Literal(lit) => IoTypes::Concrete(lit.get_type(ns)),
ExprKind::Command(c) => c.try_find_concrete(ns),
}
}
}
#[derive(Debug)]
struct CommandExpr<'a> {
command: Command<'a>,
args: Vec<Expr<'a>>,
}
impl<'a> CommandExpr<'a> {
fn try_find_concrete(&'a self, ns: &'a GlobalNamespace) -> IoTypes<'a> {
let Self { command, args } = self;
match command.get_output_types() {
None => IoTypes::Empty,
Some(def) => {
if let Some(concrete) = ConcreteTypeDef::try_from_typedef(&def) {
IoTypes::Concrete(concrete)
} else {
// TODO: make it possible to get clear output type
IoTypes::Unclear
}
}
}
}
}
#[derive(Debug)]
pub enum LiteralKind {
Int(i64),
@ -31,17 +81,26 @@ pub enum LiteralKind {
String(String),
}
enum IoTypes<'a> {
/// expression does not expect/return anything
Empty,
/// expression does expect/return something, but some types are unclear
Unclear,
/// we know for sure what types the expression expects/returns
Concrete(ConcreteTypeDef<'a>),
}
impl LiteralKind {
#[allow(
clippy::unwrap_used,
reason = "these are fetched by type name constants used for keeping names consistent in codebase, which cannot be None"
)]
pub fn get_type<'a>(&self, ns: &'a GlobalNamespace) -> Type<'a> {
match self {
pub fn get_type<'a>(&self, ns: &'a GlobalNamespace) -> ConcreteTypeDef<'a> {
ConcreteTypeDef::Single(match self {
LiteralKind::Int(_) => ns.get_type_by_name(TYPE_INTEGER).unwrap(),
LiteralKind::Float(_) => ns.get_type_by_name(TYPE_FLOAT).unwrap(),
LiteralKind::String(_) => ns.get_type_by_name(TYPE_STRING).unwrap(),
}
})
}
}
@ -61,7 +120,7 @@ pub fn into_typed_repr(
res.push(Expr {
kind: match kind {
CommandPartKind::Word(val) => ExprKind::Command {
CommandPartKind::Word(val) => ExprKind::Command(CommandExpr {
command: {
let Some(c) = ns.get_command_by_name(val) else {
errs.push(span);
@ -70,7 +129,7 @@ pub fn into_typed_repr(
c
},
args: Vec::new(),
},
}),
CommandPartKind::Integer(val) => {
ExprKind::Literal(LiteralKind::Int(*val))
}
@ -93,7 +152,7 @@ pub fn into_typed_repr(
};
res.push(Expr {
kind: ExprKind::Command {
kind: ExprKind::Command(CommandExpr {
command: {
let Some(c) = ns.get_command_by_name(name) else {
errs.push(span.clone());
@ -116,7 +175,7 @@ pub fn into_typed_repr(
span: span.clone(),
})
.collect(),
},
}),
span: span.clone(),
});
}
@ -131,3 +190,60 @@ pub fn into_typed_repr(
Err(Errors::new(crate::error::ErrorKind::CommandNotFound, errs))
}
}
enum ConcreteTypeDef<'a> {
Single(Type<'a>),
List(Vec<ConcreteTypeDef<'a>>),
Record(Vec<(String, ConcreteTypeDef<'a>)>),
}
impl<'a> ConcreteTypeDef<'a> {
fn try_from_typedef(val: &TypeDef<'a>) -> Option<Self> {
match val {
TypeDef::Type(typ) => Some(Self::Single(*typ)),
TypeDef::Trait(_) => None,
TypeDef::List(list) => {
let out: Vec<ConcreteTypeDef<'a>> =
list.iter().filter_map(Self::try_from_typedef).collect();
(out.len() == list.len()).then_some(ConcreteTypeDef::List(out))
}
TypeDef::Record(rec) => {
let out: Vec<(String, ConcreteTypeDef<'a>)> = rec
.iter()
.filter_map(|(name, def)| {
Self::try_from_typedef(def).map(|def| (name.clone(), def))
})
.collect();
(out.len() == rec.len()).then_some(ConcreteTypeDef::Record(out))
}
}
}
}
struct TypeChecker<'a> {
global_ns: &'a GlobalNamespace,
typed_syntax: Vec<Expr<'a>>,
}
impl<'a> TypeChecker<'a> {
fn new(ns: &'a GlobalNamespace, syntax: Vec<Expr<'a>>) -> TypeChecker<'a> {
Self {
global_ns: ns,
typed_syntax: syntax,
}
}
// not sure if this is the optimal alg, or even a working one, but lets see
fn check_forward(&self) {
let i = 0;
// loop {
// let maybe_concrete = match self.typed_syntax[i].kind {
// ExprKind::Literal(l) => todo!(),
// ExprKind::Command(c) => todo!(),
// }
// }
}
}