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support string escapes: \b \t \n \f \r \\ \" \' \xHH \OOO

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This commit is contained in:
River Tarnell 2008-08-09 10:33:02 +00:00
parent d2e95116f0
commit d3ce6a5973
1 changed files with 23 additions and 3 deletions
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26
parser_native/parser.cpp
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@ -151,6 +151,20 @@ f_float(std::vector<datum> const &args)
return datum::from_double(args[0].toFloat());
}
datum
f_append(datum const &a, char b)
{
return datum::from_string(a.toString() + b);
}
datum
f_strip_last(datum const &a)
{
std::string s(a.toString());
s.resize(s.size() - 1);
return datum::from_string(s);
}
}
/*
@ -261,9 +275,15 @@ struct parser_grammar : public grammar<parser_grammar, parser_closure::context_t
| bin_p[value.val = bind(&datum::from_int)(arg1)] >> 'b'
| int_p[value.val = bind(&datum::from_int)(arg1)]
]
| confix_p('"', *c_escape_ch_p, '"')[
value.val = bind(&datum::from_string)(construct_<std::string>(arg1 + 1, arg2 - 1))
]
/*
* config_p can't be used here, because it will rewrite
* *(c_escape_ch_p[x]) into (*c_escape_ch_p)[x]
*/
| (
ch_p('"')[value.val = ""]
>> *((c_escape_ch_p[value.val = bind(&f_append)(value.val, arg1)] - '"'))
>> ch_p('"')[value.val = bind(&f_strip_last)(value.val)]
)
;
/*