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parsers: support translatable token aliases

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In addition to

    %token NUM "number"

accept

    %token NUM _("number")

in which case the token will be translated in error messages.
Do not use _() in the output if there are no translatable tokens.

* src/symtab.h, src/symtab.c (symbol): Add a 'translatable' member.
* src/parse-gram.y (TSTRING): New token.
(string_as_id.opt): Replace with...
(alias): this.
Use it.
* src/scan-gram.l (SC_ESCAPED_TSTRING): New start conditions, to match
TSTRINGs.
* src/output.c (prepare_symbols): Define b4_translatable if there are
translatable strings.

* data/skeletons/glr.c, data/skeletons/lalr1.cc,
* data/skeletons/yacc.c (yytnamerr): Receive b4_translatable, and use it.
This commit is contained in:
Akim Demaille
2018-12-28 08:47:04 +01:00
parent e9d404415a
commit 9096955fba
6 changed files with 79 additions and 18 deletions
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24
src/output.c
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@@ -50,6 +50,10 @@ static struct obstack format_obstack;
| result of formatting the FIRST and then TABLE_DATA[BEGIN..END[ (of |
| TYPE), and to the muscle NAME_max, the max value of the |
| TABLE_DATA. |
| |
| For the typical case of outputting a complete table from 0, pass |
| TABLE[0] as FIRST, and 1 as BEGIN. For instance |
| muscle_insert_base_table ("pact", base, base[0], 1, nstates); |
`-------------------------------------------------------------------*/
@@ -248,6 +252,26 @@ prepare_symbols (void)
prepare_symbol_names ("tname");
prepare_symbol_names ("symbol_names");
/* translatable -- whether a token is translatable. */
{
bool translatable = false;
for (int i = 0; i < ntokens; ++i)
if (symbols[i]->translatable)
{
translatable = true;
break;
}
if (translatable)
{
int *values = xnmalloc (nsyms, sizeof *values);
for (int i = 0; i < ntokens; ++i)
values[i] = symbols[i]->translatable;
muscle_insert_int_table ("translatable", values,
values[0], 1, ntokens);
free (values);
}
}
/* Output YYTOKNUM. */
{
int *values = xnmalloc (ntokens, sizeof *values);