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TODO : Make RE Grammar template independent. Difine Unified grammar format.

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IlyaShurupov 2023-11-02 15:55:55 +03:00 • committed by Ilya Shurupov
parent 53b690dad9
commit 419ebb43d1
4 changed files with 115 additions and 11 deletions
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49
Language/private/Grammar.cpp
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@ -1,4 +1,53 @@
#include "Grammar.hpp"
#include "NewPlacement.hpp"
using namespace tp;
ContextFreeGrammar::Arg::Arg(const String& id, bool terminal, bool epsilon) {
mId = id;
mIsTerminal = terminal;
mIsEpsilon = epsilon;
}
const String& ContextFreeGrammar::Arg::getId() const { return mId; }
bool ContextFreeGrammar::Arg::operator==(const Arg& in) const { return (mId == in.mId) && (mIsEpsilon == in.mIsEpsilon) && (mIsTerminal == in.mIsTerminal); }
ContextFreeGrammar::Rule::Rule(const String& id, const InitialierList<Arg>& args) {
mId = id;
mArgs = args;
}
bool ContextFreeGrammar::Rule::operator==(const Rule& in) const { return (mId == in.mId) && (mArgs == in.mArgs); }
bool ContextFreeGrammar::Rule::isProductive() const {
for (auto arg : mArgs) {
if (arg->getId() == mId) return false;
}
return true;
}
bool ContextFreeGrammar::NonTerminal::isProductive() const {
for (auto rule : rules) {
if (rule->isProductive()) return true;
}
return false;
}
bool ContextFreeGrammar::NonTerminal::isLooped(Map<String, ualni>& processed, const String& id) const {
for (auto ref : referencing) {
if (processed.presents(ref->key)) return true;
}
processed.put(id, {});
for (auto ref : referencing) {
if (ref->val->isLooped(processed, ref->key)) return true;
}
return false;
}
void ContextFreeGrammar::addRule(const Rule& rule) { mRules.append(rule); }
void ContextFreeGrammar::addRule(const String& id, const InitialierList<Arg>& args) { addRule(Rule(id, args)); }
void ContextFreeGrammar::setStart(const String& startRule) { mStartTerminal = startRule; }

11
Language/private/SimpleParser.cpp
View file

@ -12,15 +12,8 @@ SimpleParser::SimpleParser() {
ContextFreeGrammar contextFreeGrammar;
{
// use existing CF grammar interface
auto term = contextFreeGrammar.createTerminal();
auto nonTerm = contextFreeGrammar.createNonTerminal();
auto nonTerm2 = contextFreeGrammar.createNonTerminal();
contextFreeGrammar.addRule(nonTerm, { term, nonTerm2 });
contextFreeGrammar.addRule();
contextFreeGrammar.setStart(nonTerm);
contextFreeGrammar.addRule("a", { ContextFreeGrammar::Arg("") });
contextFreeGrammar.setStart("a");
}
// Define Regular grammar