initial compiler

Author: 25DanielG

.gitignore

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+*.output
+*.o

exec.sh

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+cd JavaTownCompiler
+rm out/javat
+bison -dv javat.y
+flex -l javat.l
+gcc -o out/javat javat.tab.c lex.yy.c

javat.l

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+%option noyywrap
+
+%{
+#include <stdio.h>
+#define YY_DECL int yylex()
+#include "javat.tab.h"
+%}
+
+%%
+[ \t]	; // ignore all space
+"public" { return PUBLIC; }
+"private" { return PRIVATE; }
+"class" { return CLASS; }
+[A-Za-z_] { yylval.string = strdup(yytext); return LETTER; }
+[A-Za-z_]+[A-Za-z0-9_$]* { yylval.string = strdup(yytext); return WORD; }
+[0-9]+\.[0-9]+ 	{ yylval.floating = atof(yytext); return FLOAT; }
+[0-9]+[A-Za-z_]+[A-Za-z0-9_$]* { return DISALLOWED_INDENTIFIER; }
+[0-9]+		{ yylval.number = atoi(yytext); return INT; }
+";"		{ return SEMICOLON; }
+"+"		{ return ADD; }
+"-"		{ return SUBT; }
+"*"		{ return MULT; }
+"/"		{ return DIV; }
+"("		{ return LPAR; }
+")"		{ return RPAR; }
+"{"		{ return LBRACE; }
+"}"		{ return RBRACE; }
+\"""	{ return QUOTE; }
+"="     { return EQUALS; }
+"\n"    { return NEW; }
+%%