diff --git a/ast/alloc_size_attr.go b/ast/alloc_size_attr.go
index 1d6adf3..0439eeb 100644
--- a/ast/alloc_size_attr.go
+++ b/ast/alloc_size_attr.go
@@ -3,7 +3,7 @@ package ast
 import (
 	"strings"
 
-	"git.wow.st/gmp/nswrap/util"
+	//"git.wow.st/gmp/nswrap/util"
 )
 
 // AllocSizeAttr is a type of attribute that is optionally attached to a variable
@@ -12,8 +12,8 @@ type AllocSizeAttr struct {
 	Addr       Address
 	Pos        Position
 	Inherited  bool
-	A          int
-	B          int
+	A          string
+	B          string
 	ChildNodes []Node
 }
 
@@ -27,8 +27,8 @@ func parseAllocSizeAttr(line string) *AllocSizeAttr {
 		Addr:       ParseAddress(groups["address"]),
 		Pos:        NewPositionFromString(groups["position"]),
 		Inherited:  len(groups["inherited"]) > 0,
-		A:          util.Atoi(strings.TrimSpace(groups["a"])),
-		B:          util.Atoi(strings.TrimSpace(groups["b"])),
+		A:          strings.TrimSpace(groups["a"]),
+		B:          strings.TrimSpace(groups["b"]),
 		ChildNodes: []Node{},
 	}
 }
diff --git a/ast/implicit_cast_expr.go b/ast/implicit_cast_expr.go
index a744d34..f6d6fc1 100644
--- a/ast/implicit_cast_expr.go
+++ b/ast/implicit_cast_expr.go
@@ -18,7 +18,8 @@ func parseImplicitCastExpr(line string) *ImplicitCastExpr {
 		`<(?P<position>.*)>
 		 '(?P<type>.*?)'
 		(:'(?P<type2>.*?)')?
-		 <(?P<kind>.*)>`,
+		 <(?P<kind>.*)>
+		( part_of_explicit_cast)?`,
 		line,
 	)
 
diff --git a/ast/unary_operator.go b/ast/unary_operator.go
index d2de9da..6308f27 100644
--- a/ast/unary_operator.go
+++ b/ast/unary_operator.go
@@ -19,7 +19,8 @@ func parseUnaryOperator(line string) *UnaryOperator {
 		(?P<lvalue> lvalue)?
 		(?P<prefix> prefix)?
 		(?P<postfix> postfix)?
-		 '(?P<operator>.*?)'`,
+		 '(?P<operator>.*?)'
+		( .*)?`,
 		line,
 	)
 
diff --git a/ast/var_decl.go b/ast/var_decl.go
index 29ec13b..fa6011a 100644
--- a/ast/var_decl.go
+++ b/ast/var_decl.go
@@ -15,6 +15,7 @@ type VarDecl struct {
 	Type2        string
 	IsExtern     bool
 	IsUsed       bool
+	IsRange      bool
 	IsCInit      bool
 	IsReferenced bool
 	IsStatic     bool
@@ -28,6 +29,7 @@ func parseVarDecl(line string) *VarDecl {
 		(?:parent (?P<parent>0x[0-9a-f]+) )?
 		<(?P<position>.*)>(?P<position2> .+:\d+)?
 		(?P<used> used)?
+		(?P<range> range)?
 		(?P<referenced> referenced)?
 		(?P<name> \w+)?
 		 '(?P<type>.+?)'
@@ -36,6 +38,7 @@ func parseVarDecl(line string) *VarDecl {
 		(?P<static> static)?
 		(?P<cinit> cinit)?
 		(?P<register> register)?
+		(.*)
 		`,
 		line,
 	)
@@ -55,6 +58,7 @@ func parseVarDecl(line string) *VarDecl {
 		Type2:        type2,
 		IsExtern:     len(groups["extern"]) > 0,
 		IsUsed:       len(groups["used"]) > 0,
+		IsRange:      len(groups["range"]) > 0,
 		IsCInit:      len(groups["cinit"]) > 0,
 		IsReferenced: len(groups["referenced"]) > 0,
 		IsStatic:     len(groups["static"]) > 0,
diff --git a/main.go b/main.go
index e682100..1bc78ca 100644
--- a/main.go
+++ b/main.go
@@ -23,6 +23,7 @@ type conf struct {
 	Positions bool
 	Package string
 	Inputfiles []string
+	Astfile string
 	Classes []string
 	Functions []string
 	Enums []string
@@ -157,35 +158,48 @@ func matches(x string, rs []string) bool {
 
 // Start begins transpiling an input file.
 func Start() (err error) {
-	for _, in := range Config.Inputfiles {
-		_, err := os.Stat(in)
+	astPP := []byte{}
+	if Config.Astfile != "" {
+		fmt.Printf("Reading ast file %s\n",Config.Astfile)
+		_, err = os.Stat(Config.Astfile)
 		if err != nil {
-			return fmt.Errorf("Input file %s is not found", in)
+			return fmt.Errorf("Input AST file %s not found",Config.Astfile)
+		}
+		astPP, err = ioutil.ReadFile(Config.Astfile)
+		if err != nil {
+			return err
+		}
+	} else {
+		for _, in := range Config.Inputfiles {
+			_, err = os.Stat(in)
+			if err != nil {
+				return fmt.Errorf("Input file %s is not found", in)
+			}
 		}
-	}
 
-	// Generate AST
-	cargs := []string{"-xobjective-c", "-Xclang", "-ast-dump",
-			"-fsyntax-only","-fno-color-diagnostics"}
-	if Config.Arc {
-		cargs = append(cargs,"-fobjc-arc")
-	}
-	cargs = append(cargs,Config.Inputfiles...)
-	fmt.Printf("Generating AST\n")
-	astPP, err := exec.Command("clang",cargs...).Output()
-	if err != nil {
-		// If clang fails it still prints out the AST, so we have to run it
-		// again to get the real error.
-		//errBody, _ := exec.Command("clang", cargs...).CombinedOutput()
-		var txt string
-		switch x := err.(type) {
-		case *exec.ExitError:
-			txt = string(x.Stderr)
-		default:
-			txt = err.Error()
+		// Generate AST
+		cargs := []string{"-xobjective-c", "-Xclang", "-ast-dump",
+				"-fsyntax-only","-fno-color-diagnostics"}
+		if Config.Arc {
+			cargs = append(cargs,"-fobjc-arc")
+		}
+		cargs = append(cargs,Config.Inputfiles...)
+		fmt.Printf("Generating AST\n")
+		astPP, err = exec.Command("clang",cargs...).Output()
+		if err != nil {
+			// If clang fails it still prints out the AST, so we have to run it
+			// again to get the real error.
+			//errBody, _ := exec.Command("clang", cargs...).CombinedOutput()
+			var txt string
+			switch x := err.(type) {
+			case *exec.ExitError:
+				txt = string(x.Stderr)
+			default:
+				txt = err.Error()
+			}
+			fmt.Printf("clang failed:\n%s\n", txt)
+			os.Exit(-1)
 		}
-		fmt.Printf("clang failed:\n%s\n", txt)
-		os.Exit(-1)
 	}
 
 	lines := readAST(astPP)
@@ -271,6 +285,8 @@ func main() {
 		fmt.Printf("Cannot decode config file nswrap.yaml. %s\n",err)
 		os.Exit(-1)
 	}
+	fmt.Printf("Package = %s\n",Config.Package)
+	fmt.Printf("Astfile = %s\n",Config.Astfile)
 	if err := Start(); err != nil {
 		fmt.Printf("Error: %v\n", err)
 		os.Exit(-1)