mirror of
https://github.com/roc-lang/roc.git
synced 2025-09-29 06:44:46 +00:00
819 lines
24 KiB
Rust
819 lines
24 KiB
Rust
use roc_can::annotation::IntroducedVariables;
|
|
use roc_can::def::{Declaration, Def};
|
|
use roc_can::env::Env;
|
|
use roc_can::expr::{ClosureData, Expr, Recursive};
|
|
use roc_can::pattern::Pattern;
|
|
use roc_can::scope::Scope;
|
|
use roc_collections::all::{MutSet, SendMap};
|
|
use roc_module::called_via::CalledVia;
|
|
use roc_module::ident::TagName;
|
|
use roc_module::symbol::Symbol;
|
|
use roc_region::all::{Located, Region};
|
|
use roc_types::subs::{VarStore, Variable};
|
|
use roc_types::types::Type;
|
|
|
|
/// Functions that are always implemented for Effect
|
|
type Builder = for<'r, 's, 't0, 't1> fn(
|
|
&'r mut Env<'s>,
|
|
&'t0 mut Scope,
|
|
Symbol,
|
|
TagName,
|
|
&'t1 mut VarStore,
|
|
) -> (Symbol, Def);
|
|
|
|
pub const BUILTIN_EFFECT_FUNCTIONS: [(&str, Builder); 3] = [
|
|
// Effect.after : Effect a, (a -> Effect b) -> Effect b
|
|
("after", build_effect_after),
|
|
// Effect.map : Effect a, (a -> b) -> Effect b
|
|
("map", build_effect_map),
|
|
// Effect.always : a -> Effect a
|
|
("always", build_effect_always),
|
|
];
|
|
|
|
// the Effects alias & associated functions
|
|
//
|
|
// A platform can define an Effect type in its header. It can have an arbitrary name
|
|
// (e.g. Task, IO), but we'll call it an Effect in general.
|
|
//
|
|
// From that name, we generate an effect module, an effect alias, and some functions.
|
|
//
|
|
// The effect alias is implemented as
|
|
//
|
|
// Effect a : [ @Effect ({} -> a) ]
|
|
//
|
|
// For this alias we implement the functions defined in BUILTIN_EFFECT_FUNCTIONS with the
|
|
// standard implementation.
|
|
|
|
pub fn build_effect_builtins(
|
|
env: &mut Env,
|
|
scope: &mut Scope,
|
|
effect_symbol: Symbol,
|
|
var_store: &mut VarStore,
|
|
exposed_symbols: &mut MutSet<Symbol>,
|
|
declarations: &mut Vec<Declaration>,
|
|
) {
|
|
for (_, f) in BUILTIN_EFFECT_FUNCTIONS.iter() {
|
|
let (symbol, def) = f(
|
|
env,
|
|
scope,
|
|
effect_symbol,
|
|
TagName::Private(effect_symbol),
|
|
var_store,
|
|
);
|
|
|
|
exposed_symbols.insert(symbol);
|
|
declarations.push(Declaration::Declare(def));
|
|
}
|
|
}
|
|
|
|
fn build_effect_always(
|
|
env: &mut Env,
|
|
scope: &mut Scope,
|
|
effect_symbol: Symbol,
|
|
effect_tag_name: TagName,
|
|
var_store: &mut VarStore,
|
|
) -> (Symbol, Def) {
|
|
// Effect.always = \value -> @Effect \{} -> value
|
|
|
|
let value_symbol = {
|
|
scope
|
|
.introduce(
|
|
"effect_always_value".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let inner_closure_symbol = {
|
|
scope
|
|
.introduce(
|
|
"effect_always_inner".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let always_symbol = {
|
|
scope
|
|
.introduce(
|
|
"always".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
// \{} -> value
|
|
let const_closure = {
|
|
let arguments = vec![(
|
|
var_store.fresh(),
|
|
Located::at_zero(empty_record_pattern(var_store)),
|
|
)];
|
|
|
|
let body = Expr::Var(value_symbol);
|
|
|
|
Expr::Closure(ClosureData {
|
|
function_type: var_store.fresh(),
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: inner_closure_symbol,
|
|
captured_symbols: vec![(value_symbol, var_store.fresh())],
|
|
recursive: Recursive::NotRecursive,
|
|
arguments,
|
|
loc_body: Box::new(Located::at_zero(body)),
|
|
})
|
|
};
|
|
|
|
// \value -> @Effect \{} -> value
|
|
let (function_var, always_closure) = {
|
|
// `@Effect \{} -> value`
|
|
let body = Expr::Tag {
|
|
variant_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
name: effect_tag_name.clone(),
|
|
arguments: vec![(var_store.fresh(), Located::at_zero(const_closure))],
|
|
};
|
|
|
|
let arguments = vec![(
|
|
var_store.fresh(),
|
|
Located::at_zero(Pattern::Identifier(value_symbol)),
|
|
)];
|
|
|
|
let function_var = var_store.fresh();
|
|
let closure = Expr::Closure(ClosureData {
|
|
function_type: function_var,
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: always_symbol,
|
|
captured_symbols: Vec::new(),
|
|
recursive: Recursive::NotRecursive,
|
|
arguments,
|
|
loc_body: Box::new(Located::at_zero(body)),
|
|
});
|
|
|
|
(function_var, closure)
|
|
};
|
|
|
|
let mut introduced_variables = IntroducedVariables::default();
|
|
|
|
let signature = {
|
|
// Effect.always : a -> Effect a
|
|
let var_a = var_store.fresh();
|
|
introduced_variables.insert_named("a".into(), var_a);
|
|
|
|
let effect_a = build_effect_alias(
|
|
effect_symbol,
|
|
effect_tag_name,
|
|
"a",
|
|
var_a,
|
|
Type::Variable(var_a),
|
|
var_store,
|
|
&mut introduced_variables,
|
|
);
|
|
|
|
let closure_var = var_store.fresh();
|
|
introduced_variables.insert_wildcard(closure_var);
|
|
|
|
Type::Function(
|
|
vec![Type::Variable(var_a)],
|
|
Box::new(Type::Variable(closure_var)),
|
|
Box::new(effect_a),
|
|
)
|
|
};
|
|
|
|
let def_annotation = roc_can::def::Annotation {
|
|
signature,
|
|
introduced_variables,
|
|
aliases: SendMap::default(),
|
|
region: Region::zero(),
|
|
};
|
|
|
|
let pattern = Pattern::Identifier(always_symbol);
|
|
let mut pattern_vars = SendMap::default();
|
|
pattern_vars.insert(always_symbol, function_var);
|
|
let def = Def {
|
|
loc_pattern: Located::at_zero(pattern),
|
|
loc_expr: Located::at_zero(always_closure),
|
|
expr_var: function_var,
|
|
pattern_vars,
|
|
annotation: Some(def_annotation),
|
|
};
|
|
|
|
(always_symbol, def)
|
|
}
|
|
|
|
fn build_effect_map(
|
|
env: &mut Env,
|
|
scope: &mut Scope,
|
|
effect_symbol: Symbol,
|
|
effect_tag_name: TagName,
|
|
var_store: &mut VarStore,
|
|
) -> (Symbol, Def) {
|
|
// Effect.map = \@Effect thunk, mapper -> @Effect \{} -> mapper (thunk {})
|
|
|
|
let thunk_symbol = {
|
|
scope
|
|
.introduce(
|
|
"effect_map_thunk".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let mapper_symbol = {
|
|
scope
|
|
.introduce(
|
|
"effect_map_mapper".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let map_symbol = {
|
|
scope
|
|
.introduce(
|
|
"map".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
// `thunk {}`
|
|
let force_thunk_call = {
|
|
let boxed = (
|
|
var_store.fresh(),
|
|
Located::at_zero(Expr::Var(thunk_symbol)),
|
|
var_store.fresh(),
|
|
var_store.fresh(),
|
|
);
|
|
|
|
let arguments = vec![(var_store.fresh(), Located::at_zero(Expr::EmptyRecord))];
|
|
Expr::Call(Box::new(boxed), arguments, CalledVia::Space)
|
|
};
|
|
|
|
// `toEffect (thunk {})`
|
|
let mapper_call = {
|
|
let boxed = (
|
|
var_store.fresh(),
|
|
Located::at_zero(Expr::Var(mapper_symbol)),
|
|
var_store.fresh(),
|
|
var_store.fresh(),
|
|
);
|
|
|
|
let arguments = vec![(var_store.fresh(), Located::at_zero(force_thunk_call))];
|
|
Expr::Call(Box::new(boxed), arguments, CalledVia::Space)
|
|
};
|
|
|
|
let inner_closure_symbol = {
|
|
scope
|
|
.introduce(
|
|
"effect_map_inner".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
// \{} -> mapper (thunk {})
|
|
let inner_closure = {
|
|
let arguments = vec![(
|
|
var_store.fresh(),
|
|
Located::at_zero(empty_record_pattern(var_store)),
|
|
)];
|
|
|
|
Expr::Closure(ClosureData {
|
|
function_type: var_store.fresh(),
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: inner_closure_symbol,
|
|
captured_symbols: vec![
|
|
(thunk_symbol, var_store.fresh()),
|
|
(mapper_symbol, var_store.fresh()),
|
|
],
|
|
recursive: Recursive::NotRecursive,
|
|
arguments,
|
|
loc_body: Box::new(Located::at_zero(mapper_call)),
|
|
})
|
|
};
|
|
|
|
let arguments = vec![
|
|
(
|
|
var_store.fresh(),
|
|
Located::at_zero(Pattern::AppliedTag {
|
|
whole_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
tag_name: effect_tag_name.clone(),
|
|
arguments: vec![(
|
|
var_store.fresh(),
|
|
Located::at_zero(Pattern::Identifier(thunk_symbol)),
|
|
)],
|
|
}),
|
|
),
|
|
(
|
|
var_store.fresh(),
|
|
Located::at_zero(Pattern::Identifier(mapper_symbol)),
|
|
),
|
|
];
|
|
|
|
// `@Effect \{} -> (mapper (thunk {}))`
|
|
let body = Expr::Tag {
|
|
variant_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
name: effect_tag_name.clone(),
|
|
arguments: vec![(var_store.fresh(), Located::at_zero(inner_closure))],
|
|
};
|
|
|
|
let function_var = var_store.fresh();
|
|
let map_closure = Expr::Closure(ClosureData {
|
|
function_type: function_var,
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: map_symbol,
|
|
captured_symbols: Vec::new(),
|
|
recursive: Recursive::NotRecursive,
|
|
arguments,
|
|
loc_body: Box::new(Located::at_zero(body)),
|
|
});
|
|
|
|
let mut introduced_variables = IntroducedVariables::default();
|
|
|
|
let signature = {
|
|
// Effect.map : Effect a, (a -> b) -> Effect b
|
|
let var_a = var_store.fresh();
|
|
let var_b = var_store.fresh();
|
|
|
|
introduced_variables.insert_named("a".into(), var_a);
|
|
introduced_variables.insert_named("b".into(), var_b);
|
|
|
|
let effect_a = build_effect_alias(
|
|
effect_symbol,
|
|
effect_tag_name.clone(),
|
|
"a",
|
|
var_a,
|
|
Type::Variable(var_a),
|
|
var_store,
|
|
&mut introduced_variables,
|
|
);
|
|
|
|
let effect_b = build_effect_alias(
|
|
effect_symbol,
|
|
effect_tag_name,
|
|
"b",
|
|
var_b,
|
|
Type::Variable(var_b),
|
|
var_store,
|
|
&mut introduced_variables,
|
|
);
|
|
|
|
let closure_var = var_store.fresh();
|
|
introduced_variables.insert_wildcard(closure_var);
|
|
let a_to_b = {
|
|
Type::Function(
|
|
vec![Type::Variable(var_a)],
|
|
Box::new(Type::Variable(closure_var)),
|
|
Box::new(Type::Variable(var_b)),
|
|
)
|
|
};
|
|
|
|
let closure_var = var_store.fresh();
|
|
introduced_variables.insert_wildcard(closure_var);
|
|
Type::Function(
|
|
vec![effect_a, a_to_b],
|
|
Box::new(Type::Variable(closure_var)),
|
|
Box::new(effect_b),
|
|
)
|
|
};
|
|
|
|
let def_annotation = roc_can::def::Annotation {
|
|
signature,
|
|
introduced_variables,
|
|
aliases: SendMap::default(),
|
|
region: Region::zero(),
|
|
};
|
|
|
|
let pattern = Pattern::Identifier(map_symbol);
|
|
let mut pattern_vars = SendMap::default();
|
|
pattern_vars.insert(map_symbol, function_var);
|
|
let def = Def {
|
|
loc_pattern: Located::at_zero(pattern),
|
|
loc_expr: Located::at_zero(map_closure),
|
|
expr_var: function_var,
|
|
pattern_vars,
|
|
annotation: Some(def_annotation),
|
|
};
|
|
|
|
(map_symbol, def)
|
|
}
|
|
|
|
fn build_effect_after(
|
|
env: &mut Env,
|
|
scope: &mut Scope,
|
|
effect_symbol: Symbol,
|
|
effect_tag_name: TagName,
|
|
var_store: &mut VarStore,
|
|
) -> (Symbol, Def) {
|
|
// Effect.after = \@Effect effect, toEffect -> toEffect (effect {})
|
|
|
|
let thunk_symbol = {
|
|
scope
|
|
.introduce(
|
|
"effect_after_thunk".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let to_effect_symbol = {
|
|
scope
|
|
.introduce(
|
|
"effect_after_toEffect".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let after_symbol = {
|
|
scope
|
|
.introduce(
|
|
"after".into(),
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
// `thunk {}`
|
|
let force_thunk_call = {
|
|
let boxed = (
|
|
var_store.fresh(),
|
|
Located::at_zero(Expr::Var(thunk_symbol)),
|
|
var_store.fresh(),
|
|
var_store.fresh(),
|
|
);
|
|
|
|
let arguments = vec![(var_store.fresh(), Located::at_zero(Expr::EmptyRecord))];
|
|
Expr::Call(Box::new(boxed), arguments, CalledVia::Space)
|
|
};
|
|
|
|
// `toEffect (thunk {})`
|
|
let to_effect_call = {
|
|
let boxed = (
|
|
var_store.fresh(),
|
|
Located::at_zero(Expr::Var(to_effect_symbol)),
|
|
var_store.fresh(),
|
|
var_store.fresh(),
|
|
);
|
|
|
|
let arguments = vec![(var_store.fresh(), Located::at_zero(force_thunk_call))];
|
|
Expr::Call(Box::new(boxed), arguments, CalledVia::Space)
|
|
};
|
|
|
|
let arguments = vec![
|
|
(
|
|
var_store.fresh(),
|
|
Located::at_zero(Pattern::AppliedTag {
|
|
whole_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
tag_name: effect_tag_name.clone(),
|
|
arguments: vec![(
|
|
var_store.fresh(),
|
|
Located::at_zero(Pattern::Identifier(thunk_symbol)),
|
|
)],
|
|
}),
|
|
),
|
|
(
|
|
var_store.fresh(),
|
|
Located::at_zero(Pattern::Identifier(to_effect_symbol)),
|
|
),
|
|
];
|
|
|
|
let function_var = var_store.fresh();
|
|
let after_closure = Expr::Closure(ClosureData {
|
|
function_type: function_var,
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: after_symbol,
|
|
captured_symbols: Vec::new(),
|
|
recursive: Recursive::NotRecursive,
|
|
arguments,
|
|
loc_body: Box::new(Located::at_zero(to_effect_call)),
|
|
});
|
|
|
|
let mut introduced_variables = IntroducedVariables::default();
|
|
|
|
let signature = {
|
|
let var_a = var_store.fresh();
|
|
let var_b = var_store.fresh();
|
|
|
|
introduced_variables.insert_named("a".into(), var_a);
|
|
introduced_variables.insert_named("b".into(), var_b);
|
|
|
|
let effect_a = build_effect_alias(
|
|
effect_symbol,
|
|
effect_tag_name.clone(),
|
|
"a",
|
|
var_a,
|
|
Type::Variable(var_a),
|
|
var_store,
|
|
&mut introduced_variables,
|
|
);
|
|
|
|
let effect_b = build_effect_alias(
|
|
effect_symbol,
|
|
effect_tag_name,
|
|
"b",
|
|
var_b,
|
|
Type::Variable(var_b),
|
|
var_store,
|
|
&mut introduced_variables,
|
|
);
|
|
|
|
let closure_var = var_store.fresh();
|
|
introduced_variables.insert_wildcard(closure_var);
|
|
let a_to_effect_b = Type::Function(
|
|
vec![Type::Variable(var_a)],
|
|
Box::new(Type::Variable(closure_var)),
|
|
Box::new(effect_b.clone()),
|
|
);
|
|
|
|
let closure_var = var_store.fresh();
|
|
introduced_variables.insert_wildcard(closure_var);
|
|
Type::Function(
|
|
vec![effect_a, a_to_effect_b],
|
|
Box::new(Type::Variable(closure_var)),
|
|
Box::new(effect_b),
|
|
)
|
|
};
|
|
|
|
let def_annotation = roc_can::def::Annotation {
|
|
signature,
|
|
introduced_variables,
|
|
aliases: SendMap::default(),
|
|
region: Region::zero(),
|
|
};
|
|
|
|
let pattern = Pattern::Identifier(after_symbol);
|
|
let mut pattern_vars = SendMap::default();
|
|
pattern_vars.insert(after_symbol, function_var);
|
|
let def = Def {
|
|
loc_pattern: Located::at_zero(pattern),
|
|
loc_expr: Located::at_zero(after_closure),
|
|
expr_var: function_var,
|
|
pattern_vars,
|
|
annotation: Some(def_annotation),
|
|
};
|
|
|
|
(after_symbol, def)
|
|
}
|
|
|
|
pub fn build_host_exposed_def(
|
|
env: &mut Env,
|
|
scope: &mut Scope,
|
|
symbol: Symbol,
|
|
ident: &str,
|
|
effect_tag_name: TagName,
|
|
var_store: &mut VarStore,
|
|
annotation: roc_can::annotation::Annotation,
|
|
) -> Def {
|
|
let expr_var = var_store.fresh();
|
|
let pattern = Pattern::Identifier(symbol);
|
|
let mut pattern_vars = SendMap::default();
|
|
pattern_vars.insert(symbol, expr_var);
|
|
|
|
let mut arguments: Vec<(Variable, Located<Pattern>)> = Vec::new();
|
|
let mut linked_symbol_arguments: Vec<(Variable, Expr)> = Vec::new();
|
|
let mut captured_symbols: Vec<(Symbol, Variable)> = Vec::new();
|
|
|
|
let def_body = {
|
|
match annotation.typ.shallow_dealias() {
|
|
Type::Function(args, _, _) => {
|
|
for i in 0..args.len() {
|
|
let name = format!("closure_arg_{}_{}", ident, i);
|
|
|
|
let arg_symbol = {
|
|
let ident = name.clone().into();
|
|
scope
|
|
.introduce(
|
|
ident,
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let arg_var = var_store.fresh();
|
|
|
|
arguments.push((arg_var, Located::at_zero(Pattern::Identifier(arg_symbol))));
|
|
|
|
captured_symbols.push((arg_symbol, arg_var));
|
|
linked_symbol_arguments.push((arg_var, Expr::Var(arg_symbol)));
|
|
}
|
|
|
|
let foreign_symbol_name = format!("roc_fx_{}", ident);
|
|
let low_level_call = Expr::ForeignCall {
|
|
foreign_symbol: foreign_symbol_name.into(),
|
|
args: linked_symbol_arguments,
|
|
ret_var: var_store.fresh(),
|
|
};
|
|
|
|
let effect_closure_symbol = {
|
|
let name = format!("effect_closure_{}", ident);
|
|
|
|
let ident = name.into();
|
|
scope
|
|
.introduce(
|
|
ident,
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let effect_closure = Expr::Closure(ClosureData {
|
|
function_type: var_store.fresh(),
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: effect_closure_symbol,
|
|
captured_symbols,
|
|
recursive: Recursive::NotRecursive,
|
|
arguments: vec![(
|
|
var_store.fresh(),
|
|
Located::at_zero(empty_record_pattern(var_store)),
|
|
)],
|
|
loc_body: Box::new(Located::at_zero(low_level_call)),
|
|
});
|
|
|
|
let body = Expr::Tag {
|
|
variant_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
name: effect_tag_name,
|
|
arguments: vec![(var_store.fresh(), Located::at_zero(effect_closure))],
|
|
};
|
|
|
|
Expr::Closure(ClosureData {
|
|
function_type: var_store.fresh(),
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: symbol,
|
|
captured_symbols: std::vec::Vec::new(),
|
|
recursive: Recursive::NotRecursive,
|
|
arguments,
|
|
loc_body: Box::new(Located::at_zero(body)),
|
|
})
|
|
}
|
|
_ => {
|
|
// not a function
|
|
|
|
let foreign_symbol_name = format!("roc_fx_{}", ident);
|
|
let low_level_call = Expr::ForeignCall {
|
|
foreign_symbol: foreign_symbol_name.into(),
|
|
args: linked_symbol_arguments,
|
|
ret_var: var_store.fresh(),
|
|
};
|
|
|
|
let effect_closure_symbol = {
|
|
let name = format!("effect_closure_{}", ident);
|
|
|
|
let ident = name.into();
|
|
scope
|
|
.introduce(
|
|
ident,
|
|
&env.exposed_ident_ids,
|
|
&mut env.ident_ids,
|
|
Region::zero(),
|
|
)
|
|
.unwrap()
|
|
};
|
|
|
|
let empty_record_pattern = Pattern::RecordDestructure {
|
|
whole_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
destructs: vec![],
|
|
};
|
|
|
|
let effect_closure = Expr::Closure(ClosureData {
|
|
function_type: var_store.fresh(),
|
|
closure_type: var_store.fresh(),
|
|
closure_ext_var: var_store.fresh(),
|
|
return_type: var_store.fresh(),
|
|
name: effect_closure_symbol,
|
|
captured_symbols,
|
|
recursive: Recursive::NotRecursive,
|
|
arguments: vec![(var_store.fresh(), Located::at_zero(empty_record_pattern))],
|
|
loc_body: Box::new(Located::at_zero(low_level_call)),
|
|
});
|
|
|
|
Expr::Tag {
|
|
variant_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
name: effect_tag_name,
|
|
arguments: vec![(var_store.fresh(), Located::at_zero(effect_closure))],
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
let def_annotation = roc_can::def::Annotation {
|
|
signature: annotation.typ,
|
|
introduced_variables: annotation.introduced_variables,
|
|
aliases: annotation.aliases,
|
|
region: Region::zero(),
|
|
};
|
|
|
|
Def {
|
|
loc_pattern: Located::at_zero(pattern),
|
|
loc_expr: Located::at_zero(def_body),
|
|
expr_var,
|
|
pattern_vars,
|
|
annotation: Some(def_annotation),
|
|
}
|
|
}
|
|
|
|
fn build_effect_alias(
|
|
effect_symbol: Symbol,
|
|
effect_tag_name: TagName,
|
|
a_name: &str,
|
|
a_var: Variable,
|
|
a_type: Type,
|
|
var_store: &mut VarStore,
|
|
introduced_variables: &mut IntroducedVariables,
|
|
) -> Type {
|
|
let closure_var = var_store.fresh();
|
|
introduced_variables.insert_wildcard(closure_var);
|
|
|
|
let actual = {
|
|
Type::TagUnion(
|
|
vec![(
|
|
effect_tag_name,
|
|
vec![Type::Function(
|
|
vec![Type::EmptyRec],
|
|
Box::new(Type::Variable(closure_var)),
|
|
Box::new(a_type),
|
|
)],
|
|
)],
|
|
Box::new(Type::EmptyTagUnion),
|
|
)
|
|
};
|
|
|
|
Type::Alias {
|
|
symbol: effect_symbol,
|
|
type_arguments: vec![(a_name.into(), Type::Variable(a_var))],
|
|
lambda_set_variables: vec![roc_types::types::LambdaSet(Type::Variable(closure_var))],
|
|
actual: Box::new(actual),
|
|
}
|
|
}
|
|
|
|
pub fn build_effect_actual(
|
|
effect_tag_name: TagName,
|
|
a_type: Type,
|
|
var_store: &mut VarStore,
|
|
) -> Type {
|
|
let closure_var = var_store.fresh();
|
|
|
|
Type::TagUnion(
|
|
vec![(
|
|
effect_tag_name,
|
|
vec![Type::Function(
|
|
vec![Type::EmptyRec],
|
|
Box::new(Type::Variable(closure_var)),
|
|
Box::new(a_type),
|
|
)],
|
|
)],
|
|
Box::new(Type::EmptyTagUnion),
|
|
)
|
|
}
|
|
|
|
#[inline(always)]
|
|
fn empty_record_pattern(var_store: &mut VarStore) -> Pattern {
|
|
Pattern::RecordDestructure {
|
|
whole_var: var_store.fresh(),
|
|
ext_var: var_store.fresh(),
|
|
destructs: vec![],
|
|
}
|
|
}
|