24 lines
1.2 KiB
Markdown
24 lines
1.2 KiB
Markdown
The definitions of `Atom`, `ws`, and `linecomment` are as given in the Preserves text syntax.
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{:.postcard-grammar.textsyntax}
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| *Document* | := | *Expr*<sup>⋆</sup> **ws**
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| *Expr* | := | **ws** (*SimpleExpr* | *Punct*)
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| *SimpleExpr* | := | *Compound* | *Embedded* | *Annotated* | *Atom*
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| *Compound* | := | *Sequence* | *Record* | *Block* | *Group* | *Set*
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| *Punct* | := | `,` | `;` | `:`<sup>+</sup>
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{:.postcard-grammar.textsyntax}
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| *Sequence* | := | `[` *Expr*<sup>⋆</sup> *Trailer* **ws** `]`
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| *Record* | := | `<` *Expr*<sup>⋆</sup> *Trailer* **ws** `>`
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| *Block* | := | `{` *Expr*<sup>⋆</sup> *Trailer* **ws** `}`
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| *Group* | := | `(` *Expr*<sup>⋆</sup> *Trailer* **ws** `)`
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| *Set* | := | `#{` *Expr*<sup>⋆</sup> *Trailer* **ws** `}`
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{:.postcard-grammar.textsyntax}
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| *Trailer* | := | *Annotation*<sup>⋆</sup>
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{:.postcard-grammar.textsyntax}
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| *Embedded* | := | `#!` *SimpleExpr*
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| *Annotated* | := | *Annotation* *SimpleExpr*
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| *Annotation* | := | `@` *SimpleExpr* | `#` ((**space** | **tab**) *linecomment*) (**cr** | **lf**)
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