Shahar Soel

Expose API to get the current CSTNode

2

Lets say we want to modify the CSTNode being created. For Example: ```javascript $.RULE("array", () => { const from = this.currIdx $.CONSUME(LSquare) // ... $.CONSUME(RSquare) const to = this.currIdx //...

Token categories rely on global state

4

Specifically this: - https://github.com/SAP/chevrotain/blob/5e77fc21c1ab39281acf874472a28b2698b2e334/packages/chevrotain/src/scan/tokens.ts#L34 This can cause issues when there are multiple Chevrotain packages in existence. E.g when the Lexer and Parser are in separate npm packages. This could also...

https://github.com/SAP/chevrotain/pull/1053#discussion_r330990829

User Defined Macros

4

### Description Now that Chevrotain no longer depends on Function.prototype.toString it is possible to allow end users to define their own MACROS. This means create their own Parsing DSL methods,...

Emphasize Production based tools vs Prototyping tools.

Custom User Defined Syntax Errors

3

Example ```javascript $.RULE("formalParameterList", () => { let foundRestArg = false $.MANY_SEP({ SEP: tokens.Comma, DEF: () => { $.MANY2(() => { $.SUBRULE($.variableModifier) }) $.SUBRULE($.typeType) $.OPTION(() => { $.CONSUME(tokens.DotDotDot) foundRestArg = true...

Fuzzy Parsing Example

9

See: - https://github.com/antlr/antlr4/blob/master/doc/wildcard.md#nongreedy-parser-subrules This could probably be done using [Token Categories](https://sap.github.io/chevrotain/docs/features/token_categories.html) to match against "all" kinds of tokens combined with an alternation which includes the one option we care about....

Support Lazy/Defered references in createToken function

1

See: https://github.com/matthew-dean/less.js/commit/ec5cf7778ae6f7def27a07ea4ca88e54ab2f41c4#r34664698

Ability to export grammar as EBNF text.

12

Flow: * call [getGastProductions()](http://sap.github.io/chevrotain/documentation/0_32_1/classes/_chevrotain_d_.parser.html#getgastproductions) on a parser instance. * build a walker to print out the Gast (grammar representation) as an EBNF text. Advanced features: * Generate HTML with advanced...