| /** |
| # Notation |
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| This section informally explains the grammar notation used below. |
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| ## Symbols and naming |
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| _Terminal symbol_ names start with an uppercase letter, e.g. **SimpleName**.<br> |
| _Nonterminal symbol_ names start with lowercase letter, e.g. **kotlinFile**.<br> |
| Each _production_ starts with a colon (**:**).<br> |
| _Symbol definitions_ may have many productions and are terminated by a semicolon (**;**).<br> |
| Symbol definitions may be prepended with _attributes_, e.g. `start` attribute denotes a start symbol. |
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| ## EBNF expressions |
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| Operator `|` denotes _alternative_.<br> |
| Operator `*` denotes _iteration_ (zero or more).<br> |
| Operator `+` denotes _iteration_ (one or more).<br> |
| Operator `?` denotes _option_ (zero or one).<br> |
| alpha`{`beta`}` denotes a nonempty _beta_-separated list of _alpha_'s. <br> |
| Operator ``++'' means that no space or comment allowed between operands. |
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| # Semicolons |
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| Kotlin provides "semicolon inference": syntactically, subsentences (e.g., statements, declarations etc) are separated by |
| the pseudo-token [SEMI](#SEMI), which stands for "semicolon or newline". In most cases, there's no need for semicolons in |
| Kotlin code. |
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| */ |
