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doc: more details about symbols in m4

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* data/README.md: here.
* README-hacking.md (Vocabulary): More.
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Akim Demaille
2020-06-20 09:09:26 +02:00
parent 5f95583da7
commit 238692ad77
2 changed files with 5 additions and 3 deletions
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data/README.md
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@@ -86,7 +86,7 @@ The macro `b4_symbol(NUM, FIELD)` gives access to the following FIELDS:
- `has_id`: 0 or 1
Whether the symbol has an `id`.
- `id`: string
- `id`: string (e.g., `exp`, `NUM`, or `TOK_NUM` with api.token.prefix)
If `has_id`, the name of the token kind (prefixed by api.token.prefix if
defined), otherwise empty. Guaranteed to be usable as a C identifier.
This is used to define the token kind (i.e., the enum used by the return
@@ -105,9 +105,9 @@ The macro `b4_symbol(NUM, FIELD)` gives access to the following FIELDS:
- `is_token`: 0 or 1
Whether this is a terminal symbol.
- `kind_base`: string
- `kind_base`: string (e.g., `YYSYMBOL_exp`, `YYSYMBOL_NUM`)
The base of the symbol kind, i.e., the enumerator of this symbol (token or
nonterminal) which is mapping to its `number`.
nonterminal) which is mapped to its `number`.
- `kind`: string
Same as `kind_base`, but possibly with a prefix in some languages. E.g.,