oxc-project/oxc · error

`TSEnumMemberName::TemplateString` should have no substituti

Error message

`TSEnumMemberName::TemplateString` should have no substitution and at least one quasi

What it means

Panic in TSEnumMemberName::static_name when the member is a ComputedTemplateString: it takes the template's first quasi's cooked value, but the doc contract requires the template to have no substitutions (expressions) and at least one quasi. A template with expressions or zero quisis breaks that assumption and the expect fires.

Source

Thrown at crates/oxc_ast/src/ast_impl/ts.rs:22

//! [Archived TypeScript spec](https://github.com/microsoft/TypeScript/blob/3c99d50da5a579d9fa92d02664b1b66d4ff55944/doc/spec-ARCHIVED.md)

use std::fmt;

use oxc_str::Str;

use crate::ast::*;

impl<'a> TSEnumMemberName<'a> {
    /// Get the name of this enum member.
    /// # Panics
    /// Panics if `self` is a `TemplateString` with no quasi.
    pub fn static_name(&self) -> Str<'a> {
        match self {
            Self::Identifier(ident) => ident.name.into(),
            Self::String(lit) | Self::ComputedString(lit) => lit.value,
            Self::ComputedTemplateString(template) => template
                .single_quasi()
                .expect("`TSEnumMemberName::TemplateString` should have no substitution and at least one quasi"),
        }
    }
}

impl<'a> TSType<'a> {
    /// Get the first identifier reference in this type.
    ///
    /// For qualified (i.e.  namespaced) types, the left-most identifier is
    /// returned.
    pub fn get_identifier_reference(&self) -> Option<&IdentifierReference<'a>> {
        match self {
            TSType::TSTypeReference(reference) => reference.type_name.get_identifier_reference(),
            TSType::TSTypeQuery(query) => match &query.expr_name {
                TSTypeQueryExprName::IdentifierReference(ident) => Some(ident),
                _ => None,
            },
            _ => None,
        }

View on GitHub (pinned to e1e7af627c)

Solutions

1. Match on the TSEnumMemberName variant and handle ComputedTemplateString separately before calling static_name
2. Check template.expressions.is_empty() && !template.quasis.is_empty() first
3. Return an Option/Result from static_name for non-static names instead of panicking

When it happens

Trigger: Thrown at crates/oxc_ast/src/ast_impl/ts.rs:22 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of oxc-project/oxc@e1e7af627c (2026-08-20). Data as JSON: /api/errors/0d917c57d6658530. Report an issue: GitHub.