[issue43797] Improve syntax error for invalid comparisons

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

I tried to add

    | a=NAME '=' {
        RAISE_SYNTAX_ERROR_KNOWN_LOCATION(
            a, "invalid syntax. Maybe you meant '==' or ':=' instead of '='?") }
    | a=bitwise_or '=' {
        RAISE_SYNTAX_ERROR_KNOWN_LOCATION(
            a, "invalid syntax. Maybe you meant '==' instead of '='?") }

in invalid_named_expression, but it does not have any effect.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43797>
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