swc-project/swc · error

flow type cast

Error message

flow type cast

What it means

Error "flow type cast" thrown in swc-project/swc.

Source

Thrown at crates/swc_estree_compat/src/swcify/expr.rs:842

        OptChainExpr {
            span: ctx.span(&self.base),
            optional: self.optional,
            base: Box::new(OptChainBase::Call(OptCall {
                span: ctx.span(&self.base),
                callee: self.callee.swcify(ctx),
                args: self.arguments.swcify(ctx).into_iter().flatten().collect(),
                type_args: self.type_parameters.swcify(ctx).map(From::from),
                ..Default::default()
            })),
        }
    }
}

impl Swcify for TypeCastExpression {
    type Output = Never;

    fn swcify(self, _: &Context) -> Self::Output {
        unimplemented!("flow type cast")
    }
}

impl Swcify for swc_estree_ast::JSXElement {
    type Output = swc_ecma_ast::JSXElement;

    fn swcify(self, ctx: &Context) -> Self::Output {
        swc_ecma_ast::JSXElement {
            span: ctx.span(&self.base),
            opening: self.opening_element.swcify(ctx),
            children: self.children.swcify(ctx),
            closing: self.closing_element.swcify(ctx),
        }
    }
}

impl Swcify for swc_estree_ast::JSXOpeningElement {
    type Output = swc_ecma_ast::JSXOpeningElement;

View on GitHub (pinned to d7d7434666)

When it happens

Trigger: Thrown at crates/swc_estree_compat/src/swcify/expr.rs:842 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of swc-project/swc@d7d7434666 (2026-08-16). Data as JSON: /api/errors/58e8fdce493d6534. Report an issue: GitHub.