Validate Missing performSelfAnalysis call.

[DonaldWong]

Though in tutorial where clause in select works, a similar option with subrule fails like this:

    $.RULE("struct", () => {
        $.CONSUME(Identifier)
        $.CONSUME(LCurly)
        $.OPTION(() => {
            $.SUBRULE($.member)
        })
        $.CONSUME(RCurly)
    })

    $.RULE("member", () => {
        $.CONSUME(Semicolon)
    })

The option is not working for "abc{}". It always expects semicolon.

For full test file, please refer to here

Any idea?

[bd82]

You forgot to call this.performSelfAnalysis();

• https://sap.github.io/chevrotain/docs/tutorial/step2_parsing.html#structure

[DonaldWong]

Oh. Thanks for taking time answer my silly question.

[bd82]

I never figured out how to assert that performSelfAnalysis was invoked without cause a performance regression. But now that I think about it perhaps this inspection can be added to the input setter.

[bd82]

Any future similar issues would now be automatically detected by Chevrotain. 😄
See: #988

I am afraid this could be a breaking change for a small subset of existing Chevrotain Parsers so I will need to release a major version.

[bd82]

Re-opening until this is released and documented as a breaking change.