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use crate::util::is_valid_ident;
use swc_ecma_ast::*;
use swc_ecma_visit::{Fold, FoldWith};
#[derive(Default, Clone, Copy)]
pub struct MemberExprLit;
noop_fold_type!(MemberExprLit);
impl Fold for MemberExprLit {
fn fold_member_expr(&mut self, e: MemberExpr) -> MemberExpr {
let mut e = validate!(e.fold_children_with(self));
macro_rules! handle {
($sym:expr, $span:expr) => {
if $sym.is_reserved_for_es3() || !is_valid_ident(&$sym) {
return MemberExpr {
computed: true,
prop: Box::new(Expr::Lit(Lit::Str(Str {
span: $span,
value: $sym,
has_escape: false,
}))),
..e
};
} else {
return MemberExpr {
computed: false,
prop: Box::new(Expr::Ident(quote_ident!($span, $sym))),
..e
};
}
};
}
e.prop = match *e.prop {
Expr::Ident(i) => {
if e.computed {
Box::new(Expr::Ident(i))
} else {
handle!(i.sym, i.span)
}
}
_ => e.prop,
};
e
}
fn fold_module(&mut self, node: Module) -> Module {
validate!(node.fold_children_with(self))
}
}
#[cfg(test)]
mod tests {
use super::*;
test!(
::swc_ecma_parser::Syntax::default(),
|_| MemberExprLit,
basic,
r#"obj["foo"] = "isValid";
obj.const = "isKeyword";
obj["var"] = "isKeyword";"#,
r#"obj["foo"] = "isValid";
obj["const"] = "isKeyword";
obj["var"] = "isKeyword";"#
);
test!(
::swc_ecma_parser::Syntax::default(),
|_| MemberExprLit,
issue_206,
"const number = foo[bar1][baz1]",
"const number = foo[bar1][baz1]"
);
test!(
::swc_ecma_parser::Syntax::default(),
|_| MemberExprLit,
issue_211,
"_query[idx]=$this.attr('data-ref');",
"_query[idx]=$this.attr('data-ref');"
);
}