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Much better way of handling local variables in grammar

release/4.3a0
dellaert 2014-12-02 11:24:53 +01:00
parent 468d1bd78a
commit f00f62d89f
1 changed files with 10 additions and 9 deletions
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19
wrap/Argument.h
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@ -171,27 +171,28 @@ struct ArgumentListGrammar: public classic::grammar<ArgumentListGrammar> {
wrap::ArgumentList& result_; ///< successful parse will be placed in here wrap::ArgumentList& result_; ///< successful parse will be placed in here
const Argument arg0; ///< used to reset arg
mutable Argument arg; ///< temporary argument for use during parsing
ArgumentGrammar argument_g; ///< single Argument parser
/// Construct type grammar and specify where result is placed /// Construct type grammar and specify where result is placed
ArgumentListGrammar(wrap::ArgumentList& result) : ArgumentListGrammar(wrap::ArgumentList& result) :
result_(result), argument_g(arg) { result_(result) {
} }
/// Definition of type grammar /// Definition of type grammar
template<typename ScannerT> template<typename ScannerT>
struct definition { struct definition {
const Argument arg0; ///< used to reset arg
Argument arg; ///< temporary argument for use during parsing
ArgumentGrammar argument_g; ///< single Argument parser
classic::rule<ScannerT> argument_p, argumentList_p; classic::rule<ScannerT> argument_p, argumentList_p;
definition(ArgumentListGrammar const& self) { definition(ArgumentListGrammar const& self) :
argument_g(arg) {
using namespace classic; using namespace classic;
argument_p = self.argument_g // argument_p = argument_g //
[classic::push_back_a(self.result_, self.arg)] // [classic::push_back_a(self.result_, arg)] //
[assign_a(self.arg, self.arg0)]; [assign_a(arg, arg0)];
argumentList_p = '(' >> !argument_p >> *(',' >> argument_p) >> ')'; argumentList_p = '(' >> !argument_p >> *(',' >> argument_p) >> ')';
} }