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