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use super::{list::ListFormat, Emitter, Result};
use swc_common::Spanned;
use swc_ecma_ast::*;
use swc_ecma_codegen_macros::emitter;
impl<'a> Emitter<'a> {
#[emitter]
fn emit_decl(&mut self, node: &Decl) -> Result {
match *node {
Decl::Class(ref n) => emit!(n),
Decl::Fn(ref n) => emit!(n),
Decl::Var(ref n) => {
emit!(n);
semi!();
}
Decl::TsEnum(ref n) => emit!(n),
Decl::TsInterface(ref n) => emit!(n),
Decl::TsModule(ref n) => emit!(n),
Decl::TsTypeAlias(ref n) => emit!(n),
}
}
#[emitter]
fn emit_class_decl(&mut self, node: &ClassDecl) -> Result {
self.emit_leading_comments_of_pos(node.span().lo())?;
if node.declare {
keyword!("declare");
space!();
}
for dec in &node.class.decorators {
emit!(dec);
}
keyword!("class");
space!();
emit!(node.ident);
emit!(node.class.type_params);
formatting_space!();
self.emit_class_trailing(&node.class)?;
}
#[emitter]
fn emit_fn_decl(&mut self, node: &FnDecl) -> Result {
self.emit_leading_comments_of_pos(node.span().lo())?;
if node.declare {
keyword!("declare");
space!();
}
if node.function.is_async {
keyword!("async");
space!();
}
keyword!("function");
if node.function.is_generator {
punct!("*");
formatting_space!();
} else {
space!();
}
emit!(node.ident);
self.emit_fn_trailing(&node.function)?;
}
#[emitter]
fn emit_var_decl(&mut self, node: &VarDecl) -> Result {
self.emit_leading_comments_of_pos(node.span.lo())?;
if node.declare {
keyword!("declare");
space!();
}
keyword!(node.kind.as_str());
space!();
self.emit_list(
node.span(),
Some(&node.decls),
ListFormat::VariableDeclarationList,
)?;
}
#[emitter]
fn emit_var_declarator(&mut self, node: &VarDeclarator) -> Result {
self.emit_leading_comments_of_pos(node.span().lo())?;
emit!(node.name);
if let Some(ref init) = node.init {
formatting_space!();
punct!("=");
formatting_space!();
emit!(init);
}
}
}
#[cfg(test)]
mod tests {
use crate::tests::assert_min;
#[test]
fn issue_275() {
assert_min(
"function* foo(){
yield getServiceHosts()
}",
"function*foo(){yield getServiceHosts();}",
);
}
#[test]
fn single_argument_arrow_expression() {
assert_min("function* f(){ yield x => x}", "function*f(){yield x=>x;}");
assert_min(
"function* f(){ yield ({x}) => x}",
"function*f(){yield({x})=>x;}",
);
}
}