removed deprecated lemon code and moved hyrise related files to subfolder

lemon_example/.gitignore

@@ -1,5 +0,0 @@
-flex_scanner.h
-flex_scanner.c
-lemon_parser.h
-lemon_parser.c
-lemon_test

lemon_example/build_and_run.sh

@@ -1,9 +0,0 @@
-rm -f lemon_test lemon_parser.c lemon_parser.h flex_scanner.c flex_scanner.h
-echo "Lemon"
-lemon lemon_parser.y
-echo "Flex"
-# flex lexer.l
-flex --outfile=flex_scanner.c --header-file=flex_scanner.h flex_scanner.l
-echo "Compile"
-g++ main.cpp lemon_parser.c flex_scanner.c -o lemon_test -std=c++11 -pthread
-./lemon_test

lemon_example/flex_scanner.l

@@ -1,22 +0,0 @@
-%{
-
-#include "lemon_parser.h"
-#include <stdlib.h>
-#include "token_def.h"
-
-
-%}
-
-
-%option reentrant
-%option noyywrap
-%option bison-bridge
-
-
-%%
-[0-9]+|[0-9]+.[0-9]+      { yylval->fval = atof(yytext); return NUMBER; }
-[+]         return PLUS;
-[\n]        return NL;
-[ \t]       ;       /* skip whitespace */
-.           {printf("Unknown character '%c'\n", yytext[0]); return 0;}
-%%

lemon_example/lemon_parser.y

@@ -1,23 +0,0 @@
-%include {
-	#include <assert.h>
-	#include <cstdlib>
-	#include "token_def.h"
-}
-%syntax_error { printf("Lemon syntax error\n"); }
-
-%token_type {LexerToken*}
-%extra_argument { float* result }
-
-%type expr {float}
-%left PLUS MINUS .
-
-start   ::= prog.
-
-prog    ::= prog print NL .
-prog    ::= prog print .
-prog    ::= .
-
-print   ::= expr(a) .         { *result = a; }
-
-expr(a) ::= NUMBER(b) .                { a = b->fval; }
-expr(a) ::= expr(b) PLUS expr(c) .      { a = b + c; }

lemon_example/main.cpp

@@ -1,71 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <thread>
-#include "token_def.h"
-#include "lemon_parser.h"
-#include "flex_scanner.h"
-
-// Based on https://github.com/theory/flex-lemon-example
-// and http://stackoverflow.com/questions/24833465/bison-yacc-vs-lemon-vs-standard-input
-typedef float ResultType;
-
-void *ParseAlloc(void *(*mallocProc)(size_t));
-void ParseFree(void *p, void (*freeProc)(void*));
-void Parse(void *yyp, int yymajor, LexerToken* token, ResultType*);
-
-// int yylex(void);
-// int yylval;
-
-
-float parseString(const char* string) {
-	yyscan_t scanner;
-	yylex_init(&scanner);
-	
-	// Scan the provided string
-	YY_BUFFER_STATE state = yy_scan_string(string, scanner);
-
-	void* lemonParser = ParseAlloc(malloc);
-	int tokenCode;
-	ResultType result;
-	do {
-		LexerToken token;
-		tokenCode = yylex(&token, scanner);
-		Parse(lemonParser, tokenCode, &token, &result);
-		// printf("Token %d\n", tokenCode);
-	} while (tokenCode > 0);
-
-	return result;
-}
-
-int parse_count = 0;
-void multithreadTest(int numOfParses, int id) {
-	for (int n = 0; n < numOfParses; ++n) {
-		int a = rand() % 1000 + 1;
-		int b = rand() % 1000 + 1;
-		int c = a + b;
-		char string[32];
-		sprintf(string, "%d + %d", a, b);
-
-		parse_count++;
-		int result = parseString(string);
-		if (parse_count != 1) printf("+");
-		parse_count--;
-
-		if (result != c) printf("Error[%d]! %s != %d\n", id, string, result);
-	}
-}
-
-int main(void) {
-	const int numThreads = 20;
-	int numRuns = 300;
-
-	std::thread threads[numThreads];
-	for (int n = 0; n < numThreads; ++n) {
-		threads[n] = std::thread(multithreadTest, numRuns, n);
-	}
-
-	for (int n = 0; n < numThreads; ++n) {
-		threads[n].join();
-	}
-	return 0;
-}

lemon_example/token_def.h

@@ -1,9 +0,0 @@
-
-
-struct LexerToken {
-	char* sval;
-	float fval;
-};
-
-#define YYSTYPE LexerToken
-