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feat(transformer/class-properties): transform super member expression…
…s that are inside static prop initializer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| //! ES2022: Class Properties | ||
| //! Transform of super member expressions. | ||
| use oxc_ast::ast::*; | ||
| use oxc_span::GetSpan; | ||
| use oxc_traverse::TraverseCtx; | ||
|
|
||
| use crate::Helper; | ||
|
|
||
| use super::ClassProperties; | ||
|
|
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| impl<'a, 'ctx> ClassProperties<'a, 'ctx> { | ||
| /// Transform member expression where object is a super. | ||
| /// | ||
| /// - `super.prop` -> `_superPropGet(_classBinding, "prop", _classBinding)` | ||
| /// - `super[expr]` -> `_superPropGet(_classBinding, expr, _classBinding)` | ||
| // | ||
| // `#[inline]` so that compiler sees that `expr` is an `Expression::StaticMemberExpression` | ||
| // or `Expression::ComputedMemberExpression`. | ||
| #[inline] | ||
| pub fn transform_member_expresion( | ||
| &mut self, | ||
| expr: &mut Expression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) { | ||
| let member = expr.to_member_expression(); | ||
| if matches!(member.object(), Expression::Super(_)) { | ||
| self.transform_member_expression_impl(expr, ctx); | ||
| } | ||
| } | ||
|
|
||
| fn transform_member_expression_impl( | ||
| &mut self, | ||
| expr: &mut Expression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) { | ||
| let property = match expr { | ||
| // `super.prop` -> `"prop"` | ||
| Expression::StaticMemberExpression(member) => { | ||
| let property = &member.property; | ||
| ctx.ast.expression_string_literal( | ||
| property.span, | ||
| property.name.clone(), | ||
| Some(property.name.clone()), | ||
| ) | ||
| } | ||
| // `super[expr]` -> `expr` | ||
| Expression::ComputedMemberExpression(member) => { | ||
| ctx.ast.move_expression(&mut member.expression) | ||
| } | ||
| Expression::PrivateFieldExpression(_) => { | ||
| unreachable!("`super` cannot access private fields") | ||
| } | ||
| _ => return, | ||
| }; | ||
|
|
||
| *expr = self.create_super_prop_get(expr.span(), property, ctx); | ||
| } | ||
|
|
||
| // `_superPropGet(_classBinding, "prop", _classBinding)` | ||
| fn create_super_prop_get( | ||
| &mut self, | ||
| span: Span, | ||
| property: Expression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) -> Expression<'a> { | ||
| let class_binding = self.class_bindings.get_or_init_temp_binding(ctx); | ||
| // (_classBinding, "prop", _classBinding) | ||
| let arguments = ctx.ast.vec_from_array([ | ||
| Argument::from(class_binding.create_read_expression(ctx)), | ||
| Argument::from(property), | ||
| Argument::from(class_binding.create_read_expression(ctx)), | ||
| ]); | ||
| self.ctx.helper_call_expr(Helper::SuperPropGet, span, arguments, ctx) | ||
| } | ||
| } | ||
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