Modify Painless grammar to support right brackets as statement delimiters #29566
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jdconrad
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:Core/Infra/Scripting
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Pinging @elastic/es-core-infra |
nik9000
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Apr 17, 2018
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@nik9000 Thanks for the review! Will commit once I can get the CI to pass. |
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@elasticmachine Please test this. |
jdconrad
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Apr 18, 2018
This allows the grammar to determine when and what delimiters statements will use by splitting up the statements into regular statements and delimited statements, those that do not require a delimiter versus those that do. This allows consumers of the statements to determine what delimiters the statements will use so that in certain cases semicolons are not necessary like when there's a closing right bracket. This change removes the need for semicolon insertion in the lexer, simplifying the existing lexer quite a bit. It also ensures that there isn't a need to track semicolons being inserted into places that aren't necessary such as array initializers.
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This allows the grammar to determine when and what delimiters statements will use by splitting up the statements into regular statements and delimited statements, those that do not require a delimiter versus those that do. This allows consumers of the statements to determine what delimiters the statements will use so that in certain cases semicolons are not necessary like when there's a closing right bracket. A little bit of leniency for a little a bit of convenience.
This change removes the need for semicolon insertion in the lexer, simplifying the existing lexer quite a bit. It also ensures that there isn't a need to track semicolons being inserted into places that aren't necessary such as array initializers.
The reason for the large number of lines is due to grammar regeneration. The generated code can be ignored.