1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
use crate::{
semantic_analysis::ast_node::TypedExpression, type_system::*, CallPath, CompileResult, Ident,
TypedDeclaration, TypedFunctionDeclaration,
};
use super::{module::Module, root::Root, submodule_namespace::SubmoduleNamespace, Path, PathBuf};
use sway_types::span::Span;
use std::collections::VecDeque;
/// The set of items that represent the namespace context passed throughout type checking.
#[derive(Clone, Debug, PartialEq)]
pub struct Namespace {
/// An immutable namespace that consists of the names that should always be present, no matter
/// what module or scope we are currently checking.
///
/// These include external library dependencies and (when it's added) the `std` prelude.
///
/// This is passed through type-checking in order to initialise the namespace of each submodule
/// within the project.
init: Module,
/// The `root` of the project namespace.
///
/// From the root, the entirety of the project's namespace can always be accessed.
///
/// The root is initialised from the `init` namespace before type-checking begins.
pub(crate) root: Root,
/// An absolute path from the `root` that represents the current module being checked.
///
/// E.g. when type-checking the root module, this is equal to `[]`. When type-checking a
/// submodule of the root called "foo", this would be equal to `[foo]`.
pub(crate) mod_path: PathBuf,
}
impl Namespace {
/// Initialise the namespace at its root from the given initial namespace.
pub fn init_root(init: Module) -> Self {
let root = Root::from(init.clone());
let mod_path = vec![];
Self {
init,
root,
mod_path,
}
}
/// A reference to the path of the module currently being type-checked.
pub fn mod_path(&self) -> &Path {
&self.mod_path
}
/// Find the module that these prefixes point to
pub fn find_module_path<'a, T>(&'a self, prefixes: T) -> PathBuf
where
T: IntoIterator<Item = &'a Ident>,
{
self.mod_path.iter().chain(prefixes).cloned().collect()
}
/// A reference to the root of the project namespace.
pub fn root(&self) -> &Root {
&self.root
}
/// A mutable reference to the root of the project namespace.
pub fn root_mut(&mut self) -> &mut Root {
&mut self.root
}
/// Access to the current [Module], i.e. the module at the inner `mod_path`.
///
/// Note that the [Namespace] will automatically dereference to this [Module] when attempting
/// to call any [Module] methods.
pub fn module(&self) -> &Module {
&self.root.module[&self.mod_path]
}
/// Mutable access to the current [Module], i.e. the module at the inner `mod_path`.
///
/// Note that the [Namespace] will automatically dereference to this [Module] when attempting
/// to call any [Module] methods.
pub fn module_mut(&mut self) -> &mut Module {
&mut self.root.module[&self.mod_path]
}
/// Short-hand for calling [Root::resolve_symbol] on `root` with the `mod_path`.
pub(crate) fn resolve_symbol(&self, symbol: &Ident) -> CompileResult<&TypedDeclaration> {
self.root.resolve_symbol(&self.mod_path, symbol)
}
/// Short-hand for calling [Root::resolve_call_path] on `root` with the `mod_path`.
pub(crate) fn resolve_call_path(
&self,
call_path: &CallPath,
) -> CompileResult<&TypedDeclaration> {
self.root.resolve_call_path(&self.mod_path, call_path)
}
/// Short-hand for calling [Root::resolve_type_with_self] on `root` with the `mod_path`.
pub(crate) fn resolve_type_with_self(
&mut self,
type_id: TypeId,
self_type: TypeId,
span: &Span,
enforce_type_arguments: EnforceTypeArguments,
type_info_prefix: Option<&Path>,
) -> CompileResult<TypeId> {
self.root.resolve_type_with_self(
type_id,
self_type,
span,
enforce_type_arguments,
type_info_prefix,
&self.mod_path,
)
}
/// Short-hand for calling [Root::resolve_type_without_self] on `root` and with the `mod_path`.
pub(crate) fn resolve_type_without_self(
&mut self,
type_id: TypeId,
span: &Span,
type_info_prefix: Option<&Path>,
) -> CompileResult<TypeId> {
self.root.resolve_type(
type_id,
span,
EnforceTypeArguments::Yes,
type_info_prefix,
&self.mod_path,
)
}
/// Short-hand for calling [Root::find_method_for_type] on `root` with the `mod_path`.
pub(crate) fn find_method_for_type(
&mut self,
r#type: TypeId,
method_prefix: &Path,
method_name: &Ident,
self_type: TypeId,
args_buf: &VecDeque<TypedExpression>,
) -> CompileResult<TypedFunctionDeclaration> {
self.root.find_method_for_type(
&self.mod_path,
r#type,
method_prefix,
method_name,
self_type,
args_buf,
)
}
/// Short-hand for performing a [Module::star_import] with `mod_path` as the destination.
pub(crate) fn star_import(&mut self, src: &Path) -> CompileResult<()> {
self.root.star_import(src, &self.mod_path)
}
/// Short-hand for performing a [Module::self_import] with `mod_path` as the destination.
pub(crate) fn self_import(&mut self, src: &Path, alias: Option<Ident>) -> CompileResult<()> {
self.root.self_import(src, &self.mod_path, alias)
}
/// Short-hand for performing a [Module::item_import] with `mod_path` as the destination.
pub(crate) fn item_import(
&mut self,
src: &Path,
item: &Ident,
alias: Option<Ident>,
) -> CompileResult<()> {
self.root.item_import(src, item, &self.mod_path, alias)
}
/// "Enter" the submodule at the given path by returning a new [SubmoduleNamespace].
///
/// Here we temporarily change `mod_path` to the given `dep_mod_path` and wrap `self` in a
/// [SubmoduleNamespace] type. When dropped, the [SubmoduleNamespace] resets the `mod_path`
/// back to the original path so that we can continue type-checking the current module after
/// finishing with the dependency.
pub(crate) fn enter_submodule(&mut self, dep_name: Ident) -> SubmoduleNamespace {
let init = self.init.clone();
self.submodules.entry(dep_name.to_string()).or_insert(init);
let submod_path: Vec<_> = self
.mod_path
.iter()
.cloned()
.chain(Some(dep_name))
.collect();
let parent_mod_path = std::mem::replace(&mut self.mod_path, submod_path);
SubmoduleNamespace {
namespace: self,
parent_mod_path,
}
}
}
impl std::ops::Deref for Namespace {
type Target = Module;
fn deref(&self) -> &Self::Target {
self.module()
}
}
impl std::ops::DerefMut for Namespace {
fn deref_mut(&mut self) -> &mut Self::Target {
self.module_mut()
}
}