lexer working with pcre, not building any objects for handling tokens yet

.gitignore

@@ -6,3 +6,4 @@ tags
 tmpl.*
 tests/*/itest.cc
 tests/*/itest.h
+tests/*/test

tests/build/Makefile

@@ -6,7 +6,7 @@ LDFLAGS  := -lpcre
 
 all: $(TARGET)
 
-$(TARGET):
+$(TARGET): $(shell which imbecile)
 	imbecile $(I_SOURCE).I
 	$(CXX) -o $@ *.cc $(LDFLAGS)
 

tests/build/itest.I

@@ -1,8 +1,13 @@
 
 [tokens]
 
-ASSIGN     :=
-DASSIGN    :==
+AND         and
+OR          or
+NOT         not
+LPAREN      \(
+RPAREN      \)
+WS          \s+
+EQUALS      =
 IDENTIFIER  [a-zA-Z_][a-zA-Z_0-9]*
 
 [rules]

tests/build/main.cc

@@ -0,0 +1,16 @@
+
+#include <sstream>
+#include <string>
+
+#include "itest.h"
+
+using namespace std;
+
+int main(int argc, char * argv[])
+{
+    Parser p;
+    stringstream t(string(
+                "hi there (one and two and three and four) or (two = nine)"
+                ));
+    p.parse(t);
+}

tmpl/parser.cc

@@ -88,7 +88,7 @@ bool I_CLASSNAME::parse(istream & i)
     while (buff_pos < buff_size)
     {
         int longest_match_length = 0;
-        int longest_match_index;
+        int longest_match_index = -1;
         int longest_match_ovector[ovector_size];
         for (int i = 0; i < sizeof(tokens)/sizeof(tokens[0]); i++)
         {
@@ -108,6 +108,16 @@ bool I_CLASSNAME::parse(istream & i)
                 }
             }
         }
+        if (longest_match_index >= 0)
+        {
+            cout << "Matched a " << tokens[longest_match_index].name << endl;
+            buff_pos += longest_match_length;
+        }
+        else
+        {
+            /* no pattern matched the input at the current position */
+            return false;
+        }
     }
 }