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Merged
traviscross merged 4 commits into from
Sep 5, 2025
Merged

Link out to the notation from grammar summary #1989

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62286c1
Link out to the notation from grammar summary
epage Sep 4, 2025
fd70409
Add rule identifiers to notation chapter
traviscross Sep 4, 2025
25a4588
Move `input.syntax` to the corresponding chapter
traviscross Sep 5, 2025
7da73b2
Revise link to grammar syntax in grammar summary
traviscross Sep 5, 2025
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13 changes: 13 additions & 0 deletions src/input-format.md
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@@ -1,6 +1,19 @@
r[input]
# Input format

r[input.syntax]
```grammar,lexer
@root CHAR -> <a Unicode scalar value>

NUL -> U+0000

TAB -> U+0009

LF -> U+000A

CR -> U+000D
```
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@epage epage Sep 5, 2025

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This feels a bit odd to reference this as the input syntax (and put it here. I would have expected input.syntax to be something like

@root INPUT -> SHEBANG? (BLANK_LINES FRONTMATTER)? TOKEN*

BLANK_LINES might refer to part of this but not all of it.


r[input.intro]
This chapter describes how a source file is interpreted as a sequence of tokens.

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21 changes: 1 addition & 20 deletions src/notation.md
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Expand Up @@ -50,27 +50,8 @@ r[notation.grammar.visualizations]

Below each grammar block is a button to toggle the display of a [syntax diagram]. A square element is a non-terminal rule, and a rounded rectangle is a terminal.

[syntax diagram]: https://en.wikipedia.org/wiki/Syntax_diagram

r[notation.grammar.common]
### Common productions

The following are common definitions used in the grammar.

r[input.syntax]
```grammar,lexer
@root CHAR -> <a Unicode scalar value>

NUL -> U+0000

TAB -> U+0009

LF -> U+000A

CR -> U+000D
```

[binary operators]: expressions/operator-expr.md#arithmetic-and-logical-binary-operators
[keywords]: keywords.md
[syntax diagram]: https://en.wikipedia.org/wiki/Syntax_diagram
[tokens]: tokens.md
[unary operators]: expressions/operator-expr.md#borrow-operators