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use ast::*;
use std::iter;
use swc_common::{Span, Spanned, DUMMY_SP};
pub trait ExprFactory: Into<Expr> {
fn as_arg(self) -> ExprOrSpread {
ExprOrSpread {
expr: box self.into(),
spread: None,
}
}
#[inline]
fn as_callee(self) -> ExprOrSuper {
ExprOrSuper::Expr(box self.into())
}
#[inline]
fn as_obj(self) -> ExprOrSuper {
ExprOrSuper::Expr(box self.into())
}
fn apply(self, span: Span, this: Box<Expr>, args: Vec<ExprOrSpread>) -> Expr {
let apply = self.member(Ident::new(js_word!("apply"), span));
Expr::Call(CallExpr {
span,
callee: apply.as_callee(),
args: iter::once(this.as_arg()).chain(args).collect(),
type_args: None,
})
}
fn wrap_with_paren(self) -> Expr {
let expr = box self.into();
let span = expr.span();
Expr::Paren(ParenExpr { expr, span })
}
fn make_eq<T>(self, right: T) -> Expr
where
T: Into<Expr>,
{
self.make_bin(op!("==="), right)
}
fn make_bin<T>(self, op: BinaryOp, right: T) -> Expr
where
T: Into<Expr>,
{
let right = box right.into();
Expr::Bin(BinExpr {
span: DUMMY_SP,
left: box self.into(),
op,
right,
})
}
fn member<T>(self, prop: T) -> Expr
where
T: Into<Expr>,
{
Expr::Member(MemberExpr {
obj: ExprOrSuper::Expr(box self.into()),
span: DUMMY_SP,
computed: false,
prop: box prop.into(),
})
}
fn computed_member<T>(self, prop: T) -> Expr
where
T: Into<Expr>,
{
Expr::Member(MemberExpr {
obj: ExprOrSuper::Expr(box self.into()),
span: DUMMY_SP,
computed: true,
prop: box prop.into(),
})
}
}
impl<T: Into<Expr>> ExprFactory for T {}