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43 lines
1.2 KiB
Markdown
Executable File
43 lines
1.2 KiB
Markdown
Executable File
# Formal Grammar of the schema language
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schema = include*
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( namespace\_decl | type\_decl | enum\_decl | root\_decl |
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file_extension_decl | file_identifier_decl |
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attribute\_decl | object )*
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include = `include` string\_constant `;`
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namespace\_decl = `namespace` ident ( `.` ident )* `;`
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attribute\_decl = `attribute` string\_constant `;`
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type\_decl = ( `table` | `struct` ) ident metadata `{` field\_decl+ `}`
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enum\_decl = ( `enum` | `union` ) ident [ `:` type ] metadata `{` commasep(
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enumval\_decl ) `}`
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root\_decl = `root_type` ident `;`
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field\_decl = ident `:` type [ `=` scalar ] metadata `;`
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type = `bool` | `byte` | `ubyte` | `short` | `ushort` | `int` | `uint` |
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`float` | `long` | `ulong` | `double`
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| `string` | `[` type `]` | ident
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enumval\_decl = ident [ `=` integer\_constant ]
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metadata = [ `(` commasep( ident [ `:` scalar ] ) `)` ]
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scalar = integer\_constant | float\_constant | `true` | `false`
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object = { commasep( ident `:` value ) }
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value = scalar | object | string\_constant | `[` commasep( value ) `]`
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commasep(x) = [ x ( `,` x )\* ]
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file_extension_decl = `file_extension` string\_constant `;`
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file_identifier_decl = `file_identifier` string\_constant `;`
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