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Atreya Bain
2020-09-30 20:26:38 +05:30
parent 86359ebc54
commit 63e8acf141
4 changed files with 72 additions and 62 deletions
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62
src/main.cpp
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@@ -2,70 +2,14 @@
#include <vector>
#include <string>
#include <antlr4-common.h>
#include "main.hpp"
#include "bfLexer.h"
#include "bfParser.h"
#include "bfBaseListener.h"
#include "toBFListener.hpp"
// #include "bfBaseVisitor.h"
using namespace antlr4;
void expressionPrintingListener::enterProgram(bfParser::ProgramContext *ctx)
{
printStack.push_back("");
}
void expressionPrintingListener::exitProgram(bfParser::ProgramContext *ctx)
{
std::cout << printStack.front() << std::endl;
}
void expressionPrintingListener::enterPtrIncr(bfParser::PtrIncrContext *ctx)
{
printStack.back() += "+";
}
void expressionPrintingListener::enterPtrDecr(bfParser::PtrDecrContext *ctx)
{
printStack.back() += ("-");
}
void expressionPrintingListener::enterPtrLeft(bfParser::PtrLeftContext *ctx)
{
printStack.back() += ("<");
}
void expressionPrintingListener::enterPtrRight(bfParser::PtrRightContext *ctx)
{
printStack.back() += (">");
}
void expressionPrintingListener::enterNumberedStmt(bfParser::NumberedStmtContext *ctx)
{
printStack.push_back("");
}
void expressionPrintingListener::exitNumberedStmt(bfParser::NumberedStmtContext *ctx)
{
std::string s = printStack.back();
printStack.pop_back();
int n = stoi(ctx->NUMBER()->getText());
for (int i = 0; i < n; i++)
{
printStack.back() += s;
}
}
void expressionPrintingListener::enterLoopStmt(bfParser::LoopStmtContext *ctx){
printStack.push_back("");
}
void expressionPrintingListener::exitLoopStmt(bfParser::LoopStmtContext *ctx){
std::string s = printStack.back();
printStack.pop_back();
printStack.back()+= "["+s+"]";
}
void expressionPrintingListener::enterGroupedStmt(bfParser::GroupedStmtContext *ctx){
printStack.push_back("");
}
void expressionPrintingListener::exitGroupedStmt(bfParser::GroupedStmtContext *ctx){
std::string s = printStack.back();
printStack.pop_back();
printStack.back()+=(s);
}
int main(int argc, const char *argv[])
{
std::ifstream stream;
@@ -82,7 +26,7 @@ int main(int argc, const char *argv[])
bfParser parser(&tokens);
tree::ParseTree *tree = parser.program();
expressionPrintingListener listener;
toBFListener listener;
tree::ParseTreeWalker::DEFAULT.walk(&listener, tree);
return 0;