E0027

Warning name: deprecated_syntax

The compiler may emit this warning when it still accepts outdated syntax for compatibility. Follow the diagnostic's suggested replacement and migrate the code promptly.

Deprecated syntax is temporary and may be removed in a later compiler release. After removal, the same source may produce a syntax error instead of this warning. Therefore, this page does not use a checked source example tied to one particular deprecated form; refer to the diagnostic for its exact replacement.