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d: add internationalisation support

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The D parser implements this feature similarly to the C parser,
by using Gettext. Functions gettext() and dgettext() are
imported using extern(C). The internationalisation uses yysymbol_name
to report the name of the SymbolKinds.

* data/skeletons/d.m4 (SymbolKind.toString.yytranslatable,
SymbolKind.toString.yysymbol_name: New), data/skeletons/lalr1.d: Here.
* doc/bison.texi: Document it.
* tests/calc.at: Test it.
This commit is contained in:
Adela Vais
2020-11-28 21:09:39 +02:00
committed by Akim Demaille
parent e51e89856a
commit 594cae57ca
4 changed files with 145 additions and 15 deletions
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59
data/skeletons/lalr1.d
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@@ -40,6 +40,29 @@ version(D_Version2) {
]b4_user_post_prologue[
]b4_percent_code_get([[imports]])[
import std.format;
import std.conv;
/**
* Handle error message internationalisation.
*/
static if (!is(typeof(YY_))) {
version(YYENABLE_NLS)
{
version(ENABLE_NLS)
{
extern(C) char* dgettext(const char*, const char*);
string YY_(const char* s)
{
return to!string(dgettext("bison-runtime", s));
}
}
}
static if (!is(typeof(YY_)))
{
pragma(inline, true)
string YY_(string msg) { return msg; }
}
}
/**
* A Bison parser, automatically generated from <tt>]m4_bpatsubst(b4_file_name, [^"\(.*\)"$], [\1])[</tt>.
@@ -680,20 +703,38 @@ m4_popdef([b4_at_dollar])])dnl
immutable int argmax = 5;
SymbolKind[] yyarg = new SymbolKind[argmax];
int yycount = yysyntaxErrorArguments(yyctx, yyarg, argmax);
string res = "syntax error, unexpected ";
res ~= format!"%s"(yyarg[0]);
if (yycount < argmax + 1)
string res, yyformat;
import std.string;
switch (yycount)
{
for (int yyi = 1; yyi < yycount; yyi++)
{
res ~= yyi == 1 ? ", expecting " : " or ";
res ~= format!"%s"(SymbolKind(yyarg[yyi]));
}
case 1:
yyformat = YY_("syntax error, unexpected %s");
res = format(yyformat, yyarg[0]);
break;
case 2:
yyformat = YY_("syntax error, unexpected %s, expecting %s");
res = format(yyformat, yyarg[0], yyarg[1]);
break;
case 3:
yyformat = YY_("syntax error, unexpected %s, expecting %s or %s");
res = format(yyformat, yyarg[0], yyarg[1], yyarg[2]);
break;
case 4:
yyformat = YY_("syntax error, unexpected %s, expecting %s or %s or %s");
res = format(yyformat, yyarg[0], yyarg[1], yyarg[2], yyarg[3]);
break;
case 5:
yyformat = YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s");
res = format(yyformat, yyarg[0], yyarg[1], yyarg[2], yyarg[3], yyarg[4]);
break;
default:
res = YY_("syntax error");
break;
}
yyerror(]b4_locations_if([yyctx.getLocation(), ])[res);
}]],
[[simple]], [[
yyerror(]b4_locations_if([yyctx.getLocation(), ])["syntax error");]])[
yyerror(]b4_locations_if([yyctx.getLocation(), ])[YY_("syntax error"));]])[
}
]b4_parse_error_bmatch(