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Support i18n of the parse error messages.

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* TODO (lalr1.cc/I18n): Remove.
	* data/lalr1.cc (yysyntax_error_): Support the translation of the
	error messages, as done in yacc.c.
	Stay within the yy* pseudo namespace.
(cherry picked from commit a0ffc1751e)

Conflicts:

	TODO
	data/lalr1.cc
This commit is contained in:
Akim Demaille
2008-08-21 21:46:13 +02:00
committed by Joel E. Denny
parent 1e05521d4f
commit e657f3698e
3 changed files with 56 additions and 33 deletions
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78
data/lalr1.cc
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@@ -850,9 +850,9 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
// Generate an error message.
std::string
]b4_parser_class_name[::yysyntax_error_ (int yystate, int]dnl
b4_error_verbose_if([ tok])[)
b4_error_verbose_if([ yytoken])[)
{
std::string res;
std::string yyres;
YYUSE (yystate);
#if YYERROR_VERBOSE
int yyn = yypact_[yystate];
@@ -866,38 +866,56 @@ b4_error_verbose_if([ tok])[)
/* Stay within bounds of both yycheck and yytname. */
int yychecklim = yylast_ - yyn + 1;
int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
int count = 0;
for (int x = yyxbegin; x < yyxend; ++x)
if (yycheck_[x + yyn] == x && x != yyterror_
&& !yy_table_value_is_error_ (yytable_[x + yyn]))
++count;
// FIXME: This method of building the message is not compatible
// with internationalization. It should work like yacc.c does it.
// That is, first build a string that looks like this:
// "syntax error, unexpected %s or %s or %s"
// Then, invoke YY_ on this string.
// Finally, use the string as a format to output
// yytname_[tok], etc.
// Until this gets fixed, this message appears in English only.
res = "syntax error, unexpected ";
res += yytnamerr_ (yytname_[tok]);
if (count < 5)
{
count = 0;
for (int x = yyxbegin; x < yyxend; ++x)
if (yycheck_[x + yyn] == x && x != yyterror_
&& !yy_table_value_is_error_ (yytable_[x + yyn]))
{
res += (!count++) ? ", expecting " : " or ";
res += yytnamerr_ (yytname_[x]);
}
}
// Number of "expected" tokens.
size_t yycount = 0;
// Its maximum.
enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
// Arguments of yyformat.
char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
yyarg[yycount++] = yytname_[yytoken];
for (int yyx = yyxbegin; yyx < yyxend; ++yyx)
if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_
&& !yy_table_value_is_error_ (yytable_[yyx + yyn]))
{
if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
{
yycount = 1;
break;
}
else
yyarg[yycount++] = yytname_[yyx];
}
char const* yyformat = 0;
switch (yycount)
{
#define YYCASE_(N, S) \
case N: \
yyformat = S; \
break
YYCASE_(1, YY_("syntax error, unexpected %s"));
YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
#undef YYCASE_
}
// Argument number.
size_t yyi = 0;
for (char const* yyp = yyformat; *yyp; ++yyp)
if (yyp[0] == '%' && yyp[1] == 's' && yyi < yycount)
{
yyres += yytnamerr_ (yyarg[yyi++]);
++yyp;
}
else
yyres += *yyp;
}
else
#endif
res = YY_("syntax error");
return res;
yyres = YY_("syntax error");
return yyres;
}