There's more than just those edge-cases, but the others are rare in practice. They include +, -, `, < (JSX), ::, / (regex) and maybe a few others. There's also

There's more than just those edge-cases, but the others are rare in practice. They include +, -, `, < (JSX), ::, / (regex) and maybe a few others. There's also some odd ASI issues within class bodies. https://github.com/prettier/prettier/pull/1129 https://github.com/prettier/prettier/pull/1129 can be a useful reference (and tool!)