From 4afb4310440451d37ee5e1679e4d8e1b1e84da91 Mon Sep 17 00:00:00 2001
From: William Bracho Blok <williambrachoblok@gmail.com>
Date: Tue, 22 Sep 2015 16:18:52 -0500
Subject: [PATCH] Create Parserv2

---
 Parserv2 | 175 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 175 insertions(+)
 create mode 100644 Parserv2

diff --git a/Parserv2 b/Parserv2
new file mode 100644
index 0000000..af89934
--- /dev/null
+++ b/Parserv2
@@ -0,0 +1,175 @@
+
+#include <string>       // std::string
+#include <iostream>     // std::cout
+#include <sstream>      // std::stringstream
+#include <vector>
+#include <string>
+
+using namespace std;
+
+/*
+	as of now, this parser can take a string and break it into tokens
+*/
+
+
+vector<string> tokenize(string ss)
+{
+	string tempString;
+	stringstream lineStream(ss);
+	vector<string> output;
+	
+	while (lineStream >> tempString)
+	{
+		output.push_back(tempString);
+	}
+	
+	//testing---------------
+	cout<<"TokenList: ";
+	
+	for (int i = 0; i <output.size(); ++i)
+	{
+		cout<<output[i]<<"  ";
+	}
+	//----------------------
+	
+	return output;
+	
+}
+
+
+void par_select(vector<string> input)
+{
+	// if (input[0] != "(")
+	// {
+		// cout<<"ERROR! missing parenthesis"<<endl;
+	// }
+	
+	// else
+	// {
+		// input.erase(input.begin());
+		
+	// }
+	
+	cout<<"par_select function was called!"<<endl;
+}
+
+void displayTokenList(vector<string> input)
+{
+	cout<<"TokenList: "<<endl;
+	for (int i = 0; i < input.size(); ++i)
+	{
+		cout<<input[i]<<endl;
+	}
+}
+
+
+void insertCMD(vector<string> input)
+{
+	string relationName;
+	
+	cout<<"insert-cmd function was called"<<endl;
+	if (input[0] == "INTO")
+	{
+		input.erase(input.begin());
+		relationName = input[0];
+	}
+	
+	else
+	{
+		cout<<"Syntax error!"<<endl;
+	}
+	//displayTokenList(input);
+}
+
+
+
+
+void par_line(vector<string> input)	//calls par_command() or par_query() depending on first item from token list
+{
+/*
+• Match the first item in the token list and determine weather this is a command or a query.
+• Call functions par_command() or par_query();
+• After either par_command() or par_query() returns, make sure the line ends properly with “;” token
+*/
+	string tempChar = input.back();
+	if (tempChar != ";")
+	{
+		cout<<"ERROR! missing semicolon "<<endl;
+	}
+	
+	else
+	{
+		//command
+		// if ( input[0] == "open-cmd" || input[0] == "close-cmd" || 
+			 // input[0] == "save-cmd" || input[0] == "exit-cmd" || 
+			 // input[0] == "show-cmd" || input[0] == "create-cmd" || 
+			 // input[0] == "update-cmd" || input[0] == "insert-cmd" || 
+			 // input[0] == "delete-cmd" ) 
+			// {
+				// par_command(input[0]);
+			// }
+
+		//query
+		// if ( input[0] == "select" || input[0] == "project" || 
+			 // input[0] == "product" || input[0] == "difference" || 
+			 // input[0] == "union" || input[0] == "renaming" || 
+			 // input[0] == "update-cmd" || input[0] == "insert-cmd" || 
+			 // input[0] == "delete-cmd" ) 
+			// {
+				// par_query(input[0]);
+			// }
+	
+			if ( input[0] == "INSERT")
+			{
+				input.erase(input.begin());
+				insertCMD(input);
+			}
+	}
+
+
+}
+
+
+
+// void par_command(string ss)
+// {
+	
+// }
+// void par_query(string ss);
+// {
+	// if (input[0] == "select");
+// }
+
+// void par_insert();
+// void par_relationName();
+// void par_literals();
+
+
+// void par_condition();
+// void par_conjuction();
+// void par_automicexpr():
+// /*
+// • try to match the current pointer in the token list with the atomic-expr grammar.
+// • If an Expr is identified, call par_expr() grammar function
+// */
+// void par_expr():
+// /*
+// try to match the current pointer in the token list with the expr grammar.
+// Check the current token and identify a proper query (e.g., if project-query is identified, call par_project() grammer function).
+// */
+// void par_projection():
+// /*try to match the current pointer in the token list with the projection grammar
+// ◦ Call grammar function par_attribute_list
+// ◦ (later on, return a View after the evaluation)
+// */
+int main () {
+
+	
+	string ss = "INSERT INTO animals VALUES FROM  ( Joe , cat , 4 ) ;";
+	
+	
+	vector<string> listOfTokens = tokenize(ss);
+	par_line(listOfTokens);
+	
+		
+}