added -lfl to LDFLAGS in main Makefile, added parser/parser.{lex,yy} and parser/Makefile (for real this time)

git-svn-id: svn://anubis/fart/trunk@79 7f9b0f55-74a9-4bce-be96-3c2cd072584d

Makefile

@@ -7,6 +7,8 @@ export CPPFLAGS += -I"$(shell pwd)"
 endif
 export CXXFLAGS := -Wall -O1
 
+LDFLAGS := -lfl
+
 all: $(TARGET)
 
 .PHONY: $(TARGET)

parser/Makefile

@@ -0,0 +1,29 @@
+
+FLEX := flex
+BISON := bison
+
+PARSER := parser
+
+COBJS := lex.yy.o
+CXXOBJS := $(PARSER).tab.o
+CXXOBJS += ASTNode.o
+
+all: $(COBJS) $(CXXOBJS)
+
+%.o: %.c
+	$(CC) -c -o $@ $<
+
+%.o: %.cc
+	$(CXX) -c -o $@ $<
+
+$(PARSER).tab.cc $(PARSER).tab.hh: $(PARSER).yy
+	$(BISON) -d $<
+
+lex.yy.o: lex.yy.c
+
+lex.yy.c: $(PARSER).tab.hh
+lex.yy.c: $(PARSER).lex
+	$(FLEX) $<
+
+clean:
+	-rm -f lex.yy.c $(PARSER).tab.cc $(PARSER).tab.hh *~ *.o

parser/parser.lex

@@ -0,0 +1,37 @@
+
+%{
+#include "parser.tab.hh"
+%}
+
+%%
+\+                  return PLUS;
+-                   return MINUS;
+\*                  return STAR;
+\/                  return DIVIDE;
+%                   return MOD;
+
+;                   return SEMICOLON;
+:                   return COLON;
+\?                  return QUESTION;
+\$                  return DOLLAR;
+\.                  return DOT;
+\"                  return DQUOTE;
+\'                  return SQUOTE;
+,                   return COMMA;
+
+\{                  return LCURLY;
+\}                  return RCURLY;
+\[                  return LBRACKET;
+\]                  return RBRACKET;
+\(                  return LPAREN;
+\)                  return RPAREN;
+
+0b[01]+             return BIN_NUMBER;
+0x[0-9A-Fa-f]+      return HEX_NUMBER;
+0[0-7]*             return OCT_NUMBER;
+[1-9][0-9]*         return DEC_NUMBER;
+
+
+\n                  /* ignore newlines */
+[ \t\v]             /* ignore whitespace */
+%%

parser/parser.yy

@@ -0,0 +1,76 @@
+
+%{
+#include <stdio.h>
+#include <iostream>
+using namespace std;
+
+extern "C" {
+    int yylex(void);
+}
+
+extern FILE * yyin;
+
+void yyerror(const char * str)
+{
+    fprintf(stderr, "error: %s\n", str);
+}
+
+int yywrap()
+{
+    return 1;
+}
+
+%}
+
+%token PLUS;
+%token MINUS;
+%token STAR;
+%token DIVIDE;
+%token MOD;
+
+%token SEMICOLON;
+%token COLON;
+%token QUESTION;
+%token DOLLAR;
+%token DOT;
+%token DQUOTE;
+%token SQUOTE;
+%token COMMA;
+
+%token LCURLY;
+%token RCURLY;
+%token LBRACKET;
+%token RBRACKET;
+%token LPAREN;
+%token RPAREN;
+
+%token BIN_NUMBER;
+%token HEX_NUMBER;
+%token OCT_NUMBER;
+%token DEC_NUMBER;
+
+%%
+
+program: /* empty */
+       | number program { printf("Saw a number\n"); }
+       ;
+
+number: BIN_NUMBER
+      | OCT_NUMBER
+      | DEC_NUMBER
+      | HEX_NUMBER
+      ;
+
+%%
+
+int parse(const char * fileName)
+{
+    yyin = fopen(fileName, "r");
+    if (yyin == NULL)
+    {
+        cerr << "Failed to open file '" << fileName << "'" << endl;
+        return -1;
+    }
+    yyparse();
+}
+