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//! Declaration extraction helpers for `ModuleInfoExtractor`.
//!
//! These are inherent methods that extract export information from
//! declaration AST nodes, binding patterns, and require/import patterns.
use oxc_ast::ast::{
BindingPattern, CallExpression, Declaration, ImportExpression, TSEnumMemberName,
TSModuleDeclarationName, VariableDeclarator,
};
use crate::{
DynamicImportInfo, ExportInfo, ExportName, MemberInfo, MemberKind, RequireCallInfo,
VisibilityTag,
};
use super::helpers::{
extract_class_members, extract_super_class_name, has_angular_class_decorator,
};
use super::{MemberAccess, ModuleInfoExtractor, extract_destructured_names};
impl ModuleInfoExtractor {
pub(crate) fn extract_declaration_exports(
&mut self,
decl: &Declaration<'_>,
is_type_only: bool,
) {
match decl {
Declaration::VariableDeclaration(var) => {
for declarator in &var.declarations {
self.extract_binding_pattern_names(&declarator.id, is_type_only);
}
}
Declaration::FunctionDeclaration(func) => {
if let Some(id) = func.id.as_ref() {
let name = ExportName::Named(id.name.to_string());
// Check if this is an overload — same-named export already exists
if let Some(existing) = self.exports.iter_mut().find(|e| e.name == name) {
// Update to the implementation (last declaration wins)
existing.span = id.span;
existing.is_type_only = is_type_only;
} else {
self.exports.push(ExportInfo {
name,
local_name: Some(id.name.to_string()),
is_type_only,
visibility: VisibilityTag::None,
span: id.span,
members: vec![],
super_class: None,
});
}
}
}
Declaration::ClassDeclaration(class) => {
if let Some(id) = class.id.as_ref() {
let members = extract_class_members(class, has_angular_class_decorator(class));
let super_class = extract_super_class_name(class);
self.exports.push(ExportInfo {
name: ExportName::Named(id.name.to_string()),
local_name: Some(id.name.to_string()),
is_type_only,
visibility: VisibilityTag::None,
span: id.span,
members,
super_class,
});
}
}
Declaration::TSTypeAliasDeclaration(alias) => {
self.push_type_export(&alias.id.name, alias.id.span);
}
Declaration::TSInterfaceDeclaration(iface) => {
self.push_type_export(&iface.id.name, iface.id.span);
}
Declaration::TSEnumDeclaration(enumd) => {
let members: Vec<MemberInfo> = enumd
.body
.members
.iter()
.filter_map(|member| {
let name = match &member.id {
TSEnumMemberName::Identifier(id) => id.name.to_string(),
TSEnumMemberName::String(s) | TSEnumMemberName::ComputedString(s) => {
s.value.to_string()
}
TSEnumMemberName::ComputedTemplateString(_) => return None,
};
Some(MemberInfo {
name,
kind: MemberKind::EnumMember,
span: member.span,
has_decorator: false,
})
})
.collect();
self.exports.push(ExportInfo {
name: ExportName::Named(enumd.id.name.to_string()),
local_name: Some(enumd.id.name.to_string()),
is_type_only,
visibility: VisibilityTag::None,
span: enumd.id.span,
members,
super_class: None,
});
}
Declaration::TSModuleDeclaration(module) => {
// `declare namespace` / `declare module` are type-only (ambient).
// Runtime namespaces (`export namespace Foo { ... }`) compile to
// real JavaScript objects and are NOT type-only.
let ns_type_only = module.declare || is_type_only;
match &module.id {
TSModuleDeclarationName::Identifier(id) => {
self.exports.push(ExportInfo {
name: ExportName::Named(id.name.to_string()),
local_name: Some(id.name.to_string()),
is_type_only: ns_type_only,
visibility: VisibilityTag::None,
span: id.span,
members: vec![],
super_class: None,
});
}
TSModuleDeclarationName::StringLiteral(lit) => {
self.exports.push(ExportInfo {
name: ExportName::Named(lit.value.to_string()),
local_name: Some(lit.value.to_string()),
is_type_only: ns_type_only,
visibility: VisibilityTag::None,
span: lit.span,
members: vec![],
super_class: None,
});
}
}
}
_ => {}
}
}
pub(crate) fn extract_binding_pattern_names(
&mut self,
pattern: &BindingPattern<'_>,
is_type_only: bool,
) {
for id in pattern.get_binding_identifiers() {
self.exports.push(ExportInfo {
name: ExportName::Named(id.name.to_string()),
local_name: Some(id.name.to_string()),
is_type_only,
visibility: VisibilityTag::None,
span: id.span,
members: vec![],
super_class: None,
});
}
}
/// Extract namespace member names from a declaration inside a namespace body.
///
/// Called when `namespace_depth > 0` to collect inner exported declarations
/// as `MemberInfo` entries instead of top-level module exports.
pub(crate) fn extract_namespace_members(&mut self, decl: &Declaration<'_>) {
match decl {
Declaration::FunctionDeclaration(func) => {
if let Some(id) = func.id.as_ref() {
self.pending_namespace_members.push(MemberInfo {
name: id.name.to_string(),
kind: MemberKind::NamespaceMember,
span: id.span,
has_decorator: false,
});
}
}
Declaration::VariableDeclaration(var) => {
for declarator in &var.declarations {
for id in declarator.id.get_binding_identifiers() {
self.pending_namespace_members.push(MemberInfo {
name: id.name.to_string(),
kind: MemberKind::NamespaceMember,
span: id.span,
has_decorator: false,
});
}
}
}
Declaration::ClassDeclaration(class) => {
if let Some(id) = class.id.as_ref() {
self.pending_namespace_members.push(MemberInfo {
name: id.name.to_string(),
kind: MemberKind::NamespaceMember,
span: id.span,
has_decorator: false,
});
}
}
Declaration::TSEnumDeclaration(enumd) => {
self.pending_namespace_members.push(MemberInfo {
name: enumd.id.name.to_string(),
kind: MemberKind::NamespaceMember,
span: enumd.id.span,
has_decorator: false,
});
}
Declaration::TSInterfaceDeclaration(iface) => {
self.pending_namespace_members.push(MemberInfo {
name: iface.id.name.to_string(),
kind: MemberKind::NamespaceMember,
span: iface.id.span,
has_decorator: false,
});
}
Declaration::TSTypeAliasDeclaration(alias) => {
self.pending_namespace_members.push(MemberInfo {
name: alias.id.name.to_string(),
kind: MemberKind::NamespaceMember,
span: alias.id.span,
has_decorator: false,
});
}
Declaration::TSModuleDeclaration(module) => match &module.id {
TSModuleDeclarationName::Identifier(id) => {
self.pending_namespace_members.push(MemberInfo {
name: id.name.to_string(),
kind: MemberKind::NamespaceMember,
span: id.span,
has_decorator: false,
});
}
TSModuleDeclarationName::StringLiteral(lit) => {
self.pending_namespace_members.push(MemberInfo {
name: lit.value.to_string(),
kind: MemberKind::NamespaceMember,
span: lit.span,
has_decorator: false,
});
}
},
_ => {}
}
}
/// Handle `const x = require('./y')` patterns, recording the require call
/// and tracking namespace bindings for later member access narrowing.
pub(super) fn handle_require_declaration(
&mut self,
declarator: &VariableDeclarator<'_>,
call: &CallExpression<'_>,
source: &str,
) {
match &declarator.id {
BindingPattern::ObjectPattern(obj_pat) => {
let names = extract_destructured_names(obj_pat);
self.require_calls.push(RequireCallInfo {
source: source.to_string(),
span: call.span,
destructured_names: names,
local_name: None,
});
self.handled_require_spans.insert(call.span);
}
BindingPattern::BindingIdentifier(id) => {
let local = id.name.to_string();
self.namespace_binding_names.push(local.clone());
self.require_calls.push(RequireCallInfo {
source: source.to_string(),
span: call.span,
destructured_names: Vec::new(),
local_name: Some(local),
});
self.handled_require_spans.insert(call.span);
}
_ => {}
}
}
/// Handle namespace destructuring: `const { a, b } = ns` where `ns` is a namespace
/// import, dynamic import namespace, or require namespace.
/// Records member accesses so the graph can narrow which exports are used.
pub(super) fn handle_namespace_destructuring(
&mut self,
declarator: &VariableDeclarator<'_>,
ident_name: &str,
) {
if let BindingPattern::ObjectPattern(obj_pat) = &declarator.id {
if obj_pat.rest.is_some() {
// Rest element captures remaining properties — mark as whole-object use
self.whole_object_uses.push(ident_name.to_string());
} else {
for prop in &obj_pat.properties {
if let Some(name) = prop.key.static_name() {
self.member_accesses.push(MemberAccess {
object: ident_name.to_string(),
member: name.to_string(),
});
}
}
}
}
}
/// Handle `const x = await import('./y')` and `const x = import('./y')` patterns,
/// recording the dynamic import and tracking namespace bindings.
pub(super) fn handle_dynamic_import_declaration(
&mut self,
declarator: &VariableDeclarator<'_>,
import_expr: &ImportExpression<'_>,
source: &str,
) {
match &declarator.id {
BindingPattern::ObjectPattern(obj_pat) => {
let names = extract_destructured_names(obj_pat);
self.dynamic_imports.push(DynamicImportInfo {
source: source.to_string(),
span: import_expr.span,
destructured_names: names,
local_name: None,
});
self.handled_import_spans.insert(import_expr.span);
}
BindingPattern::BindingIdentifier(id) => {
let local = id.name.to_string();
self.namespace_binding_names.push(local.clone());
self.dynamic_imports.push(DynamicImportInfo {
source: source.to_string(),
span: import_expr.span,
destructured_names: Vec::new(),
local_name: Some(local),
});
self.handled_import_spans.insert(import_expr.span);
}
_ => {}
}
}
}