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* improved ERM grammar (syntax error printing is mostly disabled)

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This commit is contained in:
mateuszb
2011-03-21 20:34:44 +00:00
parent b6c385f158
commit a09a54ba2f
1 changed files with 69 additions and 21 deletions
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90
lib/ERMParser.cpp
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@@ -63,14 +63,42 @@ void callme(char const& i)
namespace ERM
{
//i-expression (identifier expression) - an integral constant, variable symbol or array symbol
struct iexpT
{
typedef boost::optional<boost::variant<int, std::string> > valT;
boost::optional<std::string> varsym;
valT val;
};
typedef std::vector<int> identifierT;
typedef std::vector<iexpT> identifierT;
struct conditionT;
typedef
boost::optional<
boost::recursive_wrapper<conditionT>
>
conditionNodeT;
struct conditionT
{
enum ECondType{AND = 0, OR, XOR, LAST} ctype;
std::string cond;
conditionNodeT rhs;
};
std::ostream & operator << (std::ostream & out, const conditionT & cond)
{
static char sym[] = {'&', '|', 'X', '/'};
return out << sym[cond.ctype] << cond.cond << cond.rhs;
}
struct triggerT
{
std::string name;
boost::optional<identifierT> identifier;
boost::optional<std::string> condition;
boost::optional<conditionT> condition;
};
//a dirty workaround for preprocessor magic that prevents the use types with comma in it in BOOST_FUSION_ADAPT_STRUCT
@@ -86,7 +114,7 @@ namespace ERM
{
std::string name;
boost::optional<identifierT> identifier;
boost::optional<std::string> condition;
boost::optional<conditionT> condition;
bodyTbody body;
};
@@ -94,14 +122,14 @@ namespace ERM
{
std::string name;
boost::optional<identifierT> identifier;
boost::optional<std::string> condition;
boost::optional<conditionT> condition;
bodyTbody body;
};
struct postOBtriggerT
{
boost::optional<identifierT> identifier;
boost::optional<std::string> condition;
boost::optional<conditionT> condition;
};
typedef boost::variant<
@@ -120,9 +148,9 @@ namespace ERM
void identifierPrinter(const identifierT & id)
{
BOOST_FOREACH(int x, id)
BOOST_FOREACH(iexpT x, id)
{
tlog2 << "\\" << x;
tlog2 << "\\" << x.varsym << x.val;
}
}
@@ -192,18 +220,31 @@ namespace ERM
}
}
BOOST_FUSION_ADAPT_STRUCT(
ERM::iexpT,
(boost::optional<std::string>, varsym)
(ERM::iexpT::valT, val)
)
BOOST_FUSION_ADAPT_STRUCT(
ERM::triggerT,
(std::string, name)
(boost::optional<ERM::identifierT>, identifier)
(boost::optional<std::string>, condition)
(boost::optional<ERM::conditionT>, condition)
)
BOOST_FUSION_ADAPT_STRUCT(
ERM::conditionT,
(std::string, cond)
(ERM::conditionNodeT, rhs)
)
BOOST_FUSION_ADAPT_STRUCT(
ERM::instructionT,
(std::string, name)
(boost::optional<ERM::identifierT>, identifier)
(boost::optional<std::string>, condition)
(boost::optional<ERM::conditionT>, condition)
(ERM::bodyTbody, body)
)
@@ -211,14 +252,14 @@ BOOST_FUSION_ADAPT_STRUCT(
ERM::receiverT,
(std::string, name)
(boost::optional<ERM::identifierT>, identifier)
(boost::optional<std::string>, condition)
(boost::optional<ERM::conditionT>, condition)
(ERM::bodyTbody, body)
)
BOOST_FUSION_ADAPT_STRUCT(
ERM::postOBtriggerT,
(boost::optional<ERM::identifierT>, identifier)
(boost::optional<std::string>, condition)
(boost::optional<ERM::conditionT>, condition)
)
namespace ERM
@@ -228,17 +269,21 @@ namespace ERM
{
ERM_grammar() : ERM_grammar::base_type(rline, "ERM script line")
{
macro %= qi::lit('$') >> *(qi::char_ - '$') >> qi::lit('$');
iexp %= -(*qi::char_("a-z") - 'u') >> -(qi::int_ | macro);
comment = *(qi::char_);
commentLine = ~qi::char_('!') >> comment;
cmdName %= +qi::char_/*qi::repeat(2)[qi::char_]*/;
identifier %= (qi::int_ % qi::lit('/'));
condition %= qi::lit('&') >> +qi::char_("0-9a-zA-Z&/|<>=") >> qi::lit(":;");
trigger %= cmdName >> -identifier >> -condition; /////
string %= qi::lexeme['^' >> +(qi::char_ - '^') >> '^'];
body %= *( qi::char_("a-zA-Z0-9/ ") | string);
cmdName %= qi::repeat(2)[qi::char_];
identifier %= (iexp % qi::lit('/'));
condition %= (qi::lit('&') | qi::lit('|') | qi::lit('X') | qi::lit('/')) > *qi::char_("0-9a-zA-Z<>=-") > -condition;
trigger %= cmdName >> -identifier >> -condition > qi::lit(";"); /////
string %= qi::lexeme['^' >> *(qi::char_ - '^') >> '^'];
body %= qi::lit(":") > *( qi::char_("a-zA-Z0-9/ @*?%+-:|&-") | string | macro) > qi::lit(";");
instruction %= cmdName >> -identifier >> -condition >> body;
receiver %= cmdName >> -identifier >> -condition >> body;
postOBtrigger %= qi::lit("$OB") >> -identifier >> -condition;
postOBtrigger %= qi::lit("$OB") >> -identifier >> -condition > qi::lit(";");
command %= (qi::char_('!') >>
(
(qi::char_('?') >> trigger) |
@@ -256,6 +301,7 @@ namespace ERM
//error handling
string.name("string constant");
iexp.name("i-expression");
comment.name("comment");
commentLine.name("comment line");
cmdName.name("name of a command");
@@ -285,11 +331,13 @@ namespace ERM
qi::rule<Iterator, std::string()> string;
qi::rule<Iterator, std::string()> macro;
qi::rule<Iterator, iexpT()> iexp;
qi::rule<Iterator, void()> comment;
qi::rule<Iterator, void()> commentLine;
qi::rule<Iterator, std::string()> cmdName;
qi::rule<Iterator, identifierT()> identifier;
qi::rule<Iterator, std::string()> condition;
qi::rule<Iterator, conditionT()> condition;
qi::rule<Iterator, triggerT()> trigger;
qi::rule<Iterator, bodyTbody()> body;
qi::rule<Iterator, instructionT()> instruction;
@@ -311,8 +359,8 @@ void ERMParser::parseLine( std::string line )
bool r = qi::parse(beg, end, ERMgrammar, AST);
if(!r || beg != end)
{
tlog1 << "Parse error for line " << line << std::endl;
tlog1 << "\tCannot parse: " << std::string(beg, end) << std::endl;
//tlog1 << "Parse error for line " << line << std::endl;
//tlog1 << "\tCannot parse: " << std::string(beg, end) << std::endl;
}
else
{