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refactor(transformer/typescript): move the ExportNamedDeclaration logic to its function (#2074)

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Dunqing 2024-01-18 21:28:48 +08:00 committed by GitHub
parent 85c98525d7
commit 2e78b918d1
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1 changed files with 54 additions and 42 deletions
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96
crates/oxc_transformer/src/typescript/mod.rs
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@ -49,53 +49,21 @@ impl<'a> TypeScript<'a> {
}
}
/// Remove `export` from merged declaration.
/// We only preserve the first one.
/// for example:
/// ```TypeScript
/// export enum Foo {}
/// export enum Foo {}
/// ```
/// ```JavaScript
/// export enum Foo {}
/// enum Foo {}
/// ```
pub fn transform_statement(&mut self, stmt: &mut Statement<'a>) {
let Statement::ModuleDeclaration(module_decl) = stmt else {
return;
};
let ModuleDeclaration::ExportNamedDeclaration(export_decl) = &mut **module_decl else {
return;
};
let ExportNamedDeclaration {
declaration: Some(declaration),
source: None,
export_kind: ImportOrExportKind::Value,
..
} = &mut **export_decl
else {
return;
};
let id = match &declaration {
Declaration::TSEnumDeclaration(decl) => decl.id.name.clone(),
Declaration::TSModuleDeclaration(decl) => {
let TSModuleDeclarationName::Identifier(id) = &decl.id else {
return;
};
id.name.clone()
let new_stmt = match stmt {
Statement::ModuleDeclaration(module_decl) => {
if let ModuleDeclaration::ExportNamedDeclaration(decl) = &mut **module_decl {
self.transform_export_named_declaration(decl)
} else {
None
}
}
_ => return,
_ => None,
};
if self.export_name_set.insert(id) {
return;
if let Some(new_stmt) = new_stmt {
*stmt = new_stmt;
}
*stmt = Statement::Declaration(self.ast.move_declaration(declaration));
}
/// * Remove the top level import / export statements that are types
@ -550,4 +518,48 @@ impl<'a> TypeScript<'a> {
Some(Declaration::VariableDeclaration(variable_declaration))
}
/// Remove `export` from merged declaration.
/// We only preserve the first one.
/// for example:
/// ```TypeScript
/// export enum Foo {}
/// export enum Foo {}
/// ```
/// ```JavaScript
/// export enum Foo {}
/// enum Foo {}
/// ```
fn transform_export_named_declaration(
&mut self,
decl: &mut Box<'_, ExportNamedDeclaration<'a>>,
) -> Option<Statement<'a>> {
let ExportNamedDeclaration {
declaration: Some(declaration),
source: None,
export_kind: ImportOrExportKind::Value,
..
} = &mut **decl
else {
return None;
};
let id = match &declaration {
Declaration::TSEnumDeclaration(decl) => decl.id.name.clone(),
Declaration::TSModuleDeclaration(decl) => {
let TSModuleDeclarationName::Identifier(id) = &decl.id else {
return None;
};
id.name.clone()
}
_ => return None,
};
if self.export_name_set.insert(id) {
return None;
}
Some(Statement::Declaration(self.ast.move_declaration(declaration)))
}
}