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83 changes: 83 additions & 0 deletions
83
crates/oxc_transformer/src/es2022/class_properties/supers.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| //! ES2022: Class Properties | ||
| //! Transform of `super` expressions. | ||
| use oxc_ast::ast::*; | ||
| use oxc_traverse::TraverseCtx; | ||
|
|
||
| use crate::Helper; | ||
|
|
||
| use super::ClassProperties; | ||
|
|
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| impl<'a, 'ctx> ClassProperties<'a, 'ctx> { | ||
| /// Transform static member expression where object is `super`. | ||
| /// | ||
| /// `super.prop` -> `_superPropGet(_Class, "prop", _Class)` | ||
| // | ||
| // `#[inline]` so that compiler sees that `expr` is an `Expression::StaticMemberExpression`. | ||
| #[inline] | ||
| pub(super) fn transform_static_member_expression( | ||
| &mut self, | ||
| expr: &mut Expression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) { | ||
| let Expression::StaticMemberExpression(member) = expr else { unreachable!() }; | ||
| if matches!(member.object, Expression::Super(_)) { | ||
| *expr = self.transform_static_member_expression_impl(member, ctx); | ||
| } | ||
| } | ||
|
|
||
| fn transform_static_member_expression_impl( | ||
| &mut self, | ||
| member: &mut StaticMemberExpression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) -> Expression<'a> { | ||
| let property = &member.property; | ||
| let property = | ||
| ctx.ast.expression_string_literal(property.span, property.name.clone(), None); | ||
| self.create_super_prop_get(member.span, property, ctx) | ||
| } | ||
|
|
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| /// Transform computed member expression where object is `super`. | ||
| /// | ||
| /// `super[prop]` -> `_superPropGet(_Class, prop, _Class)` | ||
| // | ||
| // `#[inline]` so that compiler sees that `expr` is an `Expression::ComputedMemberExpression`. | ||
| #[inline] | ||
| pub(super) fn transform_computed_member_expression( | ||
| &mut self, | ||
| expr: &mut Expression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) { | ||
| let Expression::ComputedMemberExpression(member) = expr else { unreachable!() }; | ||
| if matches!(member.object, Expression::Super(_)) { | ||
| *expr = self.transform_computed_member_expression_impl(member, ctx); | ||
| } | ||
| } | ||
|
|
||
| fn transform_computed_member_expression_impl( | ||
| &mut self, | ||
| member: &mut ComputedMemberExpression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) -> Expression<'a> { | ||
| let property = ctx.ast.move_expression(&mut member.expression); | ||
| self.create_super_prop_get(member.span, property, ctx) | ||
| } | ||
|
|
||
| /// `_superPropGet(_Class, prop, _Class)` | ||
| fn create_super_prop_get( | ||
| &mut self, | ||
| span: Span, | ||
| property: Expression<'a>, | ||
| ctx: &mut TraverseCtx<'a>, | ||
| ) -> Expression<'a> { | ||
| let class_binding = self.get_temp_binding(ctx); | ||
| // `(_Class, prop, _Class)` | ||
| 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)), | ||
| ]); | ||
| // `_superPropGet(_Class, prop, _Class)` | ||
| self.ctx.helper_call_expr(Helper::SuperPropGet, span, arguments, ctx) | ||
| } | ||
| } |
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