Some bugfixes, allow overloading of [] and add that to vector and string, work on regex. Need closures before that finishes....

stdlib/regex.krak

@@ -0,0 +1,78 @@
+import io
+import vector
+import string
+
+fun regex(in: char*):regex {
+    return regex(string::string(in))
+}
+fun regex(in: string::string):regex {
+    var out.construct(in):regex
+    return out
+}
+
+obj regexState(Object) {
+    var character: char
+    var next_states: vector::vector<regexState*>
+    fun construct(charIn:char): regexState* {
+        character = charIn
+        next_states.construct()
+        return this
+    }
+    fun construct(): regexState* {
+        return construct(0)
+    }
+    fun copy_construct(old:regexState*): void {
+        character = regexState->character
+        next_states.copy_construct(&regexState->next_states)
+    }
+    fun destruct():void {
+        next_states.destruct()
+    }
+    fun match(input: char): vector::vector<regexState*> {
+        return next_states.filter(fun(it:regexState*):bool { return it->character == input; } )
+    }
+}
+
+obj regex(Object) {
+    var regexString: string::string
+    var begin: regexState
+    fun construct(regexStringIn: string::string): regex* {
+        regexState.construct()
+        regexString.copy_construct(&regexStringIn)
+
+        var traverse = &begin
+        for (var i = 0; i < regexString.length(); i++;) {
+            var next = new<regexState>()->construct(regexString[i])
+            traverse->next_states->add(next)
+            traverse = next
+        }
+        traverse->next_states->add(new<regexState>()->construct(1))
+
+        return this
+    }
+    fun copy_construct(old:regex*):void {
+        begin.copy_construct(&old->begin)
+        regexString.copy_construct(&old->regexString)
+    }
+    fun destruct():void {
+        begin.destruct()
+        regexString.destruct()
+    }
+    fun long_match(to_match: char*): int { return long_match(string::string(to_match)); }
+    fun long_match(to_match: string::string): int {
+        var next = vector::vector(&begin)
+        var longest = 0
+        for (var i = 0; i < to_match.length(); i++;) {
+            if (next.size == 0)
+                return longest
+            if (next.any_true(fun(state: regexState*):bool { return state->character == 1; }))
+                longest = i
+            next = next.flatten_map(fun(state: regexState*): vector::vector<regexState*> { return state->match(to_match[i]); })
+        }
+        if (next.any_true(fun(state: regexState*):bool { return state->character == 1; }))
+            return to_match.length()
+        return longest
+    }
+}
+
+