2.4.0

- use bionic
 - remove flash test
 - add Haxe 4.0.3 test
 - only test C# for Haxe 4+
 - add -D php7 for Haxe 3

.travis.yml

@@ -4,11 +4,11 @@ os:
   - linux
   - osx
 
-sudo: false
-dist: trusty
+dist: bionic
 
 haxe:
   - "3.4.7"
+  - "4.0.3"
   - development
 
 addons:
@@ -19,27 +19,20 @@ addons:
       - g++-multilib
       # Python
       - python3
+      # PHP
+      - php-cli
+      - php-mbstring
       # C#
       - mono-devel
       - mono-mcs
-      # Flash
-      - libglib2.0
-      - libfreetype6
 
 install:
   # os-specific config
-  - if [ "${TRAVIS_OS_NAME}" = "linux" ]; then
-      export DISPLAY=:99.0;
-      export AUDIODEV=null;
-      phpenv global 7.0;
-    elif [ "${TRAVIS_OS_NAME}" = "osx" ]; then
+  - if [ "${TRAVIS_OS_NAME}" = "osx" ]; then
       brew update;
       brew install mono;
-      brew upgrade python;
       brew install php;
     fi
-  # Download and setup a standalone flash player debugger
-  - haxe flash/install.hxml
   # Install haxelibs
   - if [ "${TRAVIS_HAXE_VERSION}" = "development" ]; then
       haxelib git hxcpp https://github.com/HaxeFoundation/hxcpp.git;
@@ -67,8 +60,10 @@ script:
   - haxe bin/build-neko.hxml         && neko bin/Test.n
   - haxe bin/build-js.hxml           && node bin/Test.js
   - haxe bin/build-java.hxml         && java -jar bin/Test.jar
-  - haxe bin/build-cs.hxml           && mono bin/bin/Test.exe
+  # Only test C# for Haxe 4+
+  - if [[ $(haxe -version 2&>1 | head -c 1) > 3 ]]; then
+    haxe bin/build-cs.hxml           && mono bin/bin/Test.exe;
+    fi
   - haxe bin/build-cpp.hxml          && ./bin/Test
-  - haxe bin/build-flash.hxml -D fdb && haxe flash/run.hxml bin/Test.swf
-  - haxe bin/build-php.hxml          && php bin/index.php
+  - haxe bin/build-php.hxml -D php7  && php bin/index.php
   - haxe bin/build-python.hxml       && python3 bin/Test.py

README.md

@@ -68,24 +68,36 @@ You can use `parser.allowMetadata` to parse metadata before expressions on in an
 
 You can use `new hscript.Macro(pos).convert(ast)` to convert an hscript AST to a Haxe macros one.
 
+You can use `hscript.Checker` in order to type check and even get completion, using `haxe -xml` output for type information.
+
 Limitations
 -----------
 
 Compared to Haxe, limitations are :
 
-- no type declarations (classes, enums, typedefs) : only expressions
 - `switch` construct is supported but not pattern matching (no variable capture, we use strict equality to compare `case` values and `switch` value)
 - only one variable declaration is allowed in `var`
 - the parser supports optional types for `var` and `function` if `allowTypes` is set, but the interpreter ignores them
 - you can enable per-expression position tracking by compiling with `-D hscriptPos`
+- you can parse some type declarations (import, class, typedef, etc.) with parseModule
 
 Install
 -------
 
 In order to install Haxe Script, use `haxelib install hscript` and compile your program with `-lib hscript`.
 
-There are only three files in hscript :
+These are the main required files in hscript :
 
   - `hscript.Expr` : contains enums declarations
   - `hscript.Parser` : a small parser that turns a string into an expression structure (AST)
   - `hscript.Interp` : a small interpreter that execute the AST and returns the latest evaluated value
+
+Some other optional files :
+  
+  - `hscript.Async` : converts Expr into asynchronous version
+  - `hscript.Bytes` : Expr serializer/unserializer
+  - `hscript.Checker` : type checking and completion for hscript Expr
+  - `hscript.Macro` : convert Haxe macro into hscript Expr
+  - `hscript.Printer` : convert hscript Expr to String
+  - `hscript.Tools` : utility functions (map/iter)
+ 

Test.hx

@@ -4,6 +4,7 @@ import hscript.Macro;
 import hscript.Tools;
 import hscript.Async;
 import hscript.Printer;
+import hscript.Checker;
 import haxe.unit.*;
 
 class Test extends TestCase {

appveyor.yml

@@ -8,17 +8,11 @@ install:
   # http://help.appveyor.com/discussions/problems/5616-not-able-to-build-due-to-problem-in-chocolateyinstallps1
   - ps: Set-Service wuauserv -StartupType Manual
   # Install the haxe chocolatey package (https://chocolatey.org/packages/haxe)
-  - cinst haxe -version 3.4.7 -y
+  - cinst haxe -version 4.0.3 -y
   - RefreshEnv
   # Setup haxelib
   - mkdir "%HAXELIB_ROOT%"
   - haxelib setup "%HAXELIB_ROOT%"
-  # Install test dependencies
-  - ps: Set-Service wuauserv -StartupType Manual
-  - cinst php -y
-  - RefreshEnv
-  # Download and setup a standalone flash player debugger
-  - haxe flash/install.hxml
   # Install project dependencies
   - haxelib install hxcpp     > log.txt || type log.txt && cmd /C exit 1
   - haxelib install hxjava    > log.txt || type log.txt && cmd /C exit 1
@@ -39,6 +33,4 @@ test_script:
   - haxe bin/build-java.hxml         && java -jar bin\Test.jar
   - haxe bin/build-cs.hxml           && bin\bin\Test.exe
   - haxe bin/build-cpp.hxml          && bin\Test.exe
-  - haxe bin/build-flash.hxml -D fdb && haxe flash\run.hxml bin\Test.swf
-  - haxe bin/build-php.hxml          && php bin\index.php
   - haxe bin/build-python.hxml       && C:\Python34-x64\python.exe bin\Test.py

flash/.gitignore

@@ -1,5 +0,0 @@
-*.exe
-*.app
-flashplayerdebugger
-LGPL/
-license.pdf

flash/Install.hx

@@ -1,91 +0,0 @@
-import Sys.*;
-import sys.FileSystem.*;
-import sys.io.File.*;
-import haxe.*;
-import haxe.io.*;
-
-class Install {
-	// https://www.adobe.com/support/flashplayer/downloads.html
-	static var fpDownload(default, never) = switch (systemName()) {
-		case "Linux":
-			"http://fpdownload.macromedia.com/pub/flashplayer/updaters/26/flash_player_sa_linux_debug.x86_64.tar.gz";
-		case "Mac":
-			"http://fpdownload.macromedia.com/pub/flashplayer/updaters/26/flashplayer_26_sa_debug.dmg";
-		case "Windows":
-			"http://fpdownload.macromedia.com/pub/flashplayer/updaters/26/flashplayer_26_sa_debug.exe";
-		case _:
-			throw "unsupported system";
-	}
-	// https://helpx.adobe.com/flash-player/kb/configure-debugger-version-flash-player.html
-	static var mmcfg(default, never) = switch (systemName()) {
-		case "Linux":
-			Path.join([getEnv("HOME"), "mm.cfg"]);
-		case "Mac":
-			"/Library/Application Support/Macromedia/mm.cfg";
-		case "Windows":
-			Path.join([getEnv("HOMEDRIVE") + getEnv("HOMEPATH"), "mm.cfg"]);
-		case _:
-			throw "unsupported system";
-	}
-	// http://help.adobe.com/en_US/ActionScript/3.0_ProgrammingAS3/WS5b3ccc516d4fbf351e63e3d118a9b90204-7c95.html
-	static var fpTrust(default, never) = switch (systemName()) {
-		case "Linux":
-			Path.join([getEnv("HOME"), ".macromedia/Flash_Player/#Security/FlashPlayerTrust"]);
-		case "Mac":
-			"/Library/Application Support/Macromedia/FlashPlayerTrust";
-		case "Windows":
-			Path.join([getEnv("APPDATA"), "Macromedia", "Flash Player", "#Security", "FlashPlayerTrust"]);
-		case _:
-			throw "unsupported system";
-	}
-	static function main() {
-		switch (systemName()) {
-			case "Linux":
-				// Download and unzip flash player
-				if (command("wget", [fpDownload]) != 0)
-					throw "failed to download flash player";
-				if (command("tar", ["-xf", Path.withoutDirectory(fpDownload), "-C", "flash"]) != 0)
-					throw "failed to extract flash player";
-				deleteFile(Path.withoutDirectory(fpDownload));
-			case "Mac":
-				if (command("brew", ["cask", "install", "flash-player-debugger"]) != 0)
-					throw "failed to install flash-player-debugger";
-			case "Windows":
-				// Download flash player
-				download(fpDownload, "flash\\flashplayer.exe");
-			case _:
-				throw "unsupported system";
-		}
-		
-
-		// Create a configuration file so the trace log is enabled
-		createDirectory(Path.directory(mmcfg));
-		saveContent(mmcfg, "ErrorReportingEnable=1\nTraceOutputFileEnable=1");
-
-		// Add the current directory as trusted, so exit() can be used
-		createDirectory(fpTrust);
-		saveContent(Path.join([fpTrust, "test.cfg"]), getCwd());
-	}
-	static function download(url:String, saveAs:String):Void {
-		var http = new Http(url);
-		http.onError = function(e) {
-			throw e;
-		};
-		http.customRequest(false, write(saveAs));
-	}
-	static function createDirectory(dir:String):Void {
-		try {
-			sys.FileSystem.createDirectory(dir);
-		} catch(e:Dynamic) {
-			switch (systemName()) {
-				case "Mac", "Linux":
-					if (command("sudo", ["mkdir", "-p", dir]) != 0)
-						throw 'cannot create $dir';
-					if (command("sudo", ["chmod", "a+rw", dir]) != 0)
-						throw 'cannot set permission of $dir';
-				case _:
-					throw 'cannot create $dir: $e';
-			}
-		}
-	}
-}

flash/Run.hx

@@ -1,54 +0,0 @@
-import Sys.*;
-import sys.FileSystem.*;
-import sys.io.File.*;
-import haxe.io.*;
-
-class Run {
-	// https://helpx.adobe.com/flash-player/kb/configure-debugger-version-flash-player.html
-	static var flashlog(default, never) = switch (systemName()) {
-		case "Linux":
-			Path.join([getEnv("HOME"), ".macromedia/Flash_Player/Logs/flashlog.txt"]);
-		case "Mac":
-			Path.join([getEnv("HOME"), "Library/Preferences/Macromedia/Flash Player/Logs/flashlog.txt"]);
-		case "Windows":
-			Path.join([getEnv("APPDATA"), "Macromedia", "Flash Player", "Logs", "flashlog.txt"]);
-		case _:
-			throw "unsupported system";
-	}
-	static function main() {
-		var args = args();
-		var swf = args[0];
-		var exitCode = switch (systemName()) {
-			case "Linux":
-				// The flash player has some issues with unexplained crashes,
-				// but if it runs about 16 times, it should succeed one of those...
-				var c = -1;
-				for (i in 0...16) {
-					if ((c = command("xvfb-run", ["-a", "flash/flashplayerdebugger", swf])) == 0)
-						break;
-					println('retry... (${i+1})');
-					sleep(1.5);
-				}
-				c;
-			case "Mac":
-				command("/Applications/Flash Player Debugger.app/Contents/MacOS/Flash Player Debugger", [fullPath(swf)]);
-			case "Windows":
-				command("flash\\flashplayer.exe", [fullPath(swf)]);
-			case _:
-				throw "unsupported platform";
-		}
-		if (exists(flashlog))
-			println(getContent(flashlog));
-		else {
-			println('does not exist: $flashlog');
-			var parts = Path.normalize(flashlog).split("/");
-			println(parts);
-			for (i in 0...parts.length-1) {
-				var path = parts.splice(0, i+1).join("/");
-				println('ls $path');
-				command("ls", [path]);
-			}
-		}
-		exit(exitCode);
-	}
-}

flash/install.hxml

@@ -1,2 +0,0 @@
--cp flash
---run Install

flash/run.hxml

@@ -1,2 +0,0 @@
--cp flash
---run Run

haxelib.json

@@ -3,7 +3,7 @@
   "url": "https://github.com/HaxeFoundation/hscript",
   "license": "MIT",
   "description": "Haxe Script is a scripting engine for a subset of the Haxe language",
-  "version": "2.3.0",
-  "releasenote": "",
+  "version": "2.4.0",
+  "releasenote": "Haxe 4.0 final + type checking/completion (hscript.Checker)",
   "contributors": ["ncannasse"]
 }

hscript/Async.hx

@@ -22,9 +22,16 @@
 package hscript;
 import hscript.Expr;
 
+
+enum VarMode {
+	Defined;
+	ForceSync;
+}
+
 class Async {
 
-	var varNames : Array<String>;
+	var definedVars : Array<{ n : String, prev : Null<VarMode> }>;
+	var vars : Map<String,VarMode>;
 	var currentFun : String;
 	var currentLoop : Expr;
 	var currentBreak : Expr -> Expr;
@@ -68,15 +75,33 @@ class Async {
 		return a.build(e, topLevelSync);
 	}
 
+	public dynamic function getTopLevelEnd() {
+		return ignore();
+	}
+
 	public function build( e : Expr, topLevelSync = false ) {
 		if( topLevelSync ) {
 			return buildSync(e,null);
 		} else {
-			var nothing = ignore();
-			return new Async().toCps(e, nothing, nothing);
+			var end = getTopLevelEnd();
+			return toCps(e, end, end);
 		}
 	}
 
+	function defineVar( v : String, mode ) {
+		definedVars.push({ n : v, prev : vars.get(v) });
+		vars.set(v, mode);
+	}
+
+	function lookupFunctions( el : Array<Expr> ) {
+		for( e in el )
+			switch( expr(e) ) {
+			case EFunction(_, _, name, _) if( name != null ): defineVar(name, Defined);
+			case EMeta("sync",_,expr(_) => EFunction(_,_,name,_)) if( name != null ): defineVar(name, ForceSync);
+			default:
+			}
+	}
+
 	function buildSync( e : Expr, exit : Expr ) : Expr {
 		switch( expr(e) ) {
 		case EFunction(_,_,name,_):
@@ -85,16 +110,14 @@ class Async {
 			return e;
 		case EBlock(el):
 			var v = saveVars();
-			for( e in el )
-				switch( expr(e) ) {
-				case EFunction(_, _, name, _) if( name != null ): varNames.push(name);
-				default:
-				}
+			lookupFunctions(el);
 			var e = block([for(e in el) buildSync(e,exit)], e);
 			restoreVars(v);
 			return e;
 		case EMeta("async", _, e):
 			return toCps(e, ignore(), ignore());
+		case EMeta("sync", args, ef = expr(_) => EFunction(fargs, body, name, ret)):
+			return mk(EMeta("sync",args,mk(EFunction(fargs, buildSync(body,null), name, ret),ef)),e);
 		case EBreak if( currentBreak != null ):
 			return currentBreak(e);
 		case EContinue if( currentLoop != null ):
@@ -115,7 +138,8 @@ class Async {
 	}
 
 	public function new() {
-		varNames = [];
+		vars = new Map();
+		definedVars = [];
 	}
 
 	function ignore(?e) : Expr {
@@ -199,11 +223,14 @@ class Async {
 	}
 
 	function saveVars() {
-		return varNames.length;
+		return definedVars.length;
 	}
 
 	function restoreVars(k) {
-		while( varNames.length > k ) varNames.pop();
+		while( definedVars.length > k ) {
+			var v = definedVars.pop();
+			if( v.prev == null ) vars.remove(v.n) else vars.set(v.n, v.prev);
+		}
 	}
 
 	public function toCps( e : Expr, rest : Expr, exit : Expr ) : Expr {
@@ -213,12 +240,7 @@ class Async {
 		case EBlock(el):
 			var el = el.copy();
 			var vold = saveVars();
-			// local recursion
-			for( e in el )
-				switch( expr(e) ) {
-				case EFunction(_, _, name, null): if( name != null ) varNames.push(name);
-				default:
-				}
+			lookupFunctions(el);
 			while( el.length > 0 ) {
 				var e = toCps(el.pop(), rest, exit);
 				rest = ignore(e);
@@ -228,9 +250,9 @@ class Async {
 		case EFunction(args, body, name, t):
 			var vold = saveVars();
 			if( name != null )
-				varNames.push(name);
+				defineVar(name, Defined);
 			for( a in args )
-				varNames.push(a.name);
+				defineVar(a.name, Defined);
 			args.unshift( { name : "_onEnd", t : null } );
 			var frest = ident("_onEnd",e);
 			var oldFun = currentFun;
@@ -251,7 +273,8 @@ class Async {
 			var args = [for( a in args ) fun("_rest", toCps(block([a],a), ident("_rest",a), exit))];
 			return call(ident("split",e), [rest, mk(EArrayDecl(args),e)],e);
 		case ECall(expr(_) => EIdent(i), args):
-			return makeCall( ident( varNames.indexOf(i) < 0 ? "a_" + i : i,e) , args, rest, exit);
+			var mode = vars.get(i);
+			return makeCall( ident( mode != null ? i : "a_" + i,e) , args, rest, exit, mode == ForceSync);
 		case ECall(expr(_) => EField(e, f), args):
 			return makeCall(field(e,"a_"+f,e), args, rest, exit);
 		case EFor(v, eit, eloop):
@@ -391,6 +414,8 @@ class Async {
 			return toCps(v, mk(EFunction([ { name : "_c", t : null } ], mk(ESwitch(ident("_c",v), cases, def == null ? retNull(rest) : toCps(def, rest, exit)),e)),e), exit );
 		case EThrow(v):
 			return toCps(v, mk(EFunction([ { name : "_v", t : null } ], mk(EThrow(v),v)), v), exit);
+		case EMeta(name,_,e) if( name.charCodeAt(0) == ":".code ): // ignore custom ":" metadata
+			return toCps(e, rest, exit);
 		//case EDoWhile(_), ETry(_), ECall(_):
 		default:
 			throw "Unsupported async expression " + Printer.toString(e);

hscript/Checker.hx

@@ -23,6 +23,7 @@ enum TType {
 	TAbstract( a : CAbstract, args : Array<TType> );
 	TFun( args : Array<{ name : String, opt : Bool, t : TType }>, ret : TType );
 	TAnon( fields : Array<{ name : String, opt : Bool, t : TType }> );
+	TLazy( f : Void -> TType );
 }
 
 private enum WithType {
@@ -53,13 +54,15 @@ typedef CClass = {> CNamedType,
 
 typedef CField = {
 	var isPublic : Bool;
+	var canWrite : Bool;
+	var complete : Bool;
 	var params : Array<TType>;
 	var name : String;
 	var t : TType;
 }
 
 typedef CEnum = {> CNamedType,
-	var constructors : Map<String,TType>;
+	var constructors : Array<{ name : String, ?args : Array<{ name : String, opt : Bool, t : TType }> }>;
 }
 
 typedef CTypedef = {> CNamedType,
@@ -67,6 +70,16 @@ typedef CTypedef = {> CNamedType,
 }
 
 typedef CAbstract = {> CNamedType,
+	var t : TType;
+}
+
+class Completion {
+	public var expr : Expr;
+	public var t : TType;
+	public function new(expr,t) {
+		this.expr = expr;
+		this.t = t;
+	}
 }
 
 @:allow(hscript.Checker)
@@ -118,13 +131,17 @@ class CheckerTypes {
 				for( f in c.fields ) {
 					if( f.isOverride || f.name.substr(0,4) == "get_" || f.name.substr(0,4) == "set_" ) continue;
 					var skip = false;
-					for( m in f.meta )
-						if( m.name == ":noScript" ) {
+					var complete = !StringTools.startsWith(f.name,"__"); // __uid, etc. (no metadata in such fields)
+					for( m in f.meta ) {
+						if( m.name == ":noScript"  ) {
 							skip = true;
 							break;
 						}
+						if( m.name == ":noCompletion" )
+							complete = false;
+					}
 					if( skip ) continue;
-					var fl : CField = { isPublic : f.isPublic, params : [], name : f.name, t : null };
+					var fl : CField = { isPublic : f.isPublic, canWrite : f.set.match(RNormal | RCall(_) | RDynamic), complete : complete, params : [], name : f.name, t : null };
 					for( p in f.params ) {
 						var pt = TParam(p);
 						var key = f.name+"."+p;
@@ -148,12 +165,14 @@ class CheckerTypes {
 			var en : CEnum = {
 				name : e.path,
 				params : [],
-				constructors: new Map(),
+				constructors: [],
 			};
 			for( p in e.params )
 				en.params.push(TParam(p));
 			todo.push(function() {
 				localParams = [for( t in en.params ) e.path+"."+Checker.typeStr(t) => t];
+				for( c in e.constructors )
+					en.constructors.push({ name : c.name, args : c.args == null ? null : [for( a in c.args ) { name : a.name, opt : a.opt, t : makeXmlType(a.t) }] });
 				localParams = null;
 			});
 			types.set(en.name, CTEnum(en));
@@ -179,11 +198,13 @@ class CheckerTypes {
 			var ta : CAbstract = {
 				name : a.path,
 				params : [],
+				t : null,
 			};
 			for( p in a.params )
 				ta.params.push(TParam(p));
 			todo.push(function() {
 				localParams = [for( t in ta.params ) a.path+"."+Checker.typeStr(t) => t];
+				ta.t = makeXmlType(a.athis);
 				localParams = null;
 			});
 			types.set(a.path, CTAbstract(ta));
@@ -220,8 +241,18 @@ class CheckerTypes {
 			if( t != null ) return t;
 		}
 		var t = resolve(name,args);
-		if( t == null )
+		if( t == null ) {
+			var pack = name.split(".");
+			if( pack.length > 1 ) {
+				// bugfix for some args reported as pack._Name.Name while they are not private
+				var priv = pack[pack.length-2];
+				if( priv.charCodeAt(0) == "_".code ) {
+					pack.remove(priv);
+					return getType(pack.join("."), args);
+				}
+			}
 			return TUnresolved(name); // most likely private class
+		}
 		return t;
 	}
 
@@ -250,14 +281,29 @@ class Checker {
 	var locals : Map<String,TType>;
 	var globals : Map<String,TType> = new Map();
 	var events : Map<String,TType> = new Map();
+	var currentFunType : TType;
+	var isCompletion : Bool;
+	var allowDefine : Bool;
 	public var allowAsync : Bool;
 	public var allowReturn : Null<TType>;
+	public var allowGlobalsDefine : Bool;
+	public var allowUntypedMeta : Bool;
 
 	public function new( ?types ) {
 		if( types == null ) types = new CheckerTypes();
 		this.types = types;
 	}
 
+	public function setGlobals( cl : CClass ) {
+		for( f in cl.fields )
+			if( f.isPublic )
+				setGlobal(f.name, f.params.length == 0 ? f.t : TLazy(function() return apply(f.t,f.params,[for( i in 0...f.params.length) makeMono()])));
+	}
+
+	public function removeGlobal( name : String ) {
+		globals.remove(name);
+	}
+
 	public function setGlobal( name : String, type : TType ) {
 		globals.set(name, type);
 	}
@@ -270,9 +316,54 @@ class Checker {
 		return globals;
 	}
 
-	public function check( expr : Expr, ?withType : WithType ) {
+	function typeArgs( args : Array<Argument>, pos : Expr ) {
+		return [for( i in 0...args.length ) {
+			var a = args[i];
+			var at = a.t == null ? makeMono() : makeType(a.t, pos);
+			{ name : a.name, opt : a.opt, t : at };
+		}];
+	}
+
+	public function check( expr : Expr, ?withType : WithType, ?isCompletion = false ) {
 		if( withType == null ) withType = NoValue;
 		locals = new Map();
+		allowDefine = allowGlobalsDefine;
+		this.isCompletion = isCompletion;
+		switch( edef(expr) ) {
+		case EBlock(el):
+			var delayed = [];
+			var last = TVoid;
+			for( e in el ) {
+				while( true ) {
+					switch( edef(e) ) {
+					case EMeta(_,_,e2): e = e2;
+					default: break;
+					}
+				}
+				switch( edef(e) ) {
+				case EFunction(args,_,name,ret) if( name != null ):
+					var tret = ret == null ? makeMono() : makeType(ret, e);
+					var ft = TFun(typeArgs(args,e),tret);
+					locals.set(name, ft);
+					delayed.push(function() {
+						currentFunType = ft;
+						typeExpr(e, NoValue);
+						return ft;
+					});
+				default:
+					for( f in delayed ) f();
+					delayed = [];
+					if( el[el.length-1] == e )
+						last = typeExpr(e, withType);
+					else
+						typeExpr(e, NoValue);
+				}
+			}
+			for( f in delayed )
+				last = f();
+			return last;
+		default:
+		}
 		return typeExpr(expr,withType);
 	}
 
@@ -287,7 +378,7 @@ class Checker {
 	inline function error( msg : String, curExpr : Expr ) {
 		var e = ECustom(msg);
 		#if hscriptPos var e = new Error(e, curExpr.pmin, curExpr.pmax, curExpr.origin, curExpr.line); #end
-		throw e;
+		if( !isCompletion ) throw e;
 	}
 
 	function saveLocals() {
@@ -297,8 +388,11 @@ class Checker {
 	function makeType( t : CType, e : Expr ) : TType {
 		return switch (t) {
 		case CTPath(path, params):
-			var ct = types.resolve(path.join("."),params == null ? [] : [for( p in params ) makeType(t,e)]);
-			if( ct == null ) error("Unknown type "+path, e);
+			var ct = types.resolve(path.join("."),params == null ? [] : [for( p in params ) makeType(p,e)]);
+			if( ct == null ) {
+				error("Unknown type "+path, e);
+				ct = TDynamic;
+			}
 			return ct;
 		case CTFun(args, ret):
 			var i = 0;
@@ -307,6 +401,10 @@ class Checker {
 			return TAnon([for( f in fields ) { name : f.name, opt : false, t : makeType(f.t,e) }]);
 		case CTParent(t):
 			return makeType(t,e);
+		case CTNamed(n, t):
+			return makeType(t,e);
+		case CTOpt(t):
+			return makeType(t,e);
 		}
 	}
 
@@ -316,7 +414,11 @@ class Checker {
 		case TMono(r): r.r == null ? "Unknown" : typeStr(r.r);
 		case TInst(c, args): c.name + makeArgs(args);
 		case TEnum(e, args): e.name + makeArgs(args);
-		case TType(t, args): t.name + makeArgs(args);
+		case TType(t, args):
+			if( t.name == "hscript.TypeCheck" )
+				typeStr(args[1]);
+			else
+				t.name + makeArgs(args);
 		case TAbstract(a, args): a.name + makeArgs(args);
 		case TFun(args, ret): "(" + [for( a in args ) (a.opt?"?":"")+(a.name == "" ? "" : a.name+":")+typeStr(a.t)].join(", ")+") -> "+typeStr(ret);
 		case TAnon(fields): "{" + [for( f in fields ) (f.opt?"?":"")+f.name+":"+typeStr(f.t)].join(", ")+"}";
@@ -505,6 +607,25 @@ class Checker {
 				if( !typeEq(pl1[i],pl2[i]) )
 					return false;
 			return true;
+		case [TInst(cl1,pl1),TAnon(fl)]:
+			for( i in 0...fl.length ) {
+				var f2 = fl[i];
+				var f1 = null;
+				var cl = cl1;
+				while( true ) {
+				 	f1 = cl.fields.get(f2.name);
+					if( f1 != null ) break;
+					if( cl.superClass == null )
+						return false;
+					cl = switch( cl.superClass ) {
+					case TInst(c,_): c;
+					default: throw "assert";
+					}
+				}
+				if( !typeEq(f1.t,f2.t) )
+					return false;
+			}
+			return true;
 		case [TInt, TFloat]:
 			return true;
 		case [TFun(_), TAbstract({ name : "haxe.Function" },_)]:
@@ -514,12 +635,12 @@ class Checker {
 		return typeEq(t1,t2);
 	}
 
-	function unify( t1 : TType, t2 : TType, e : Expr ) {
+	public function unify( t1 : TType, t2 : TType, e : Expr ) {
 		if( !tryUnify(t1,t2) )
 			error(typeStr(t1)+" should be "+typeStr(t2),e);
 	}
 
-	function apply( t : TType, params : Array<TType>, args : Array<TType> ) {
+	public function apply( t : TType, params : Array<TType>, args : Array<TType> ) {
 		if( args.length != params.length ) throw "Invalid number of type parameters";
 		if( args.length == 0 )
 			return t;
@@ -557,14 +678,17 @@ class Checker {
 			return TFun([for( a in args ) { name : a.name, opt : a.opt, t : f(a.t) }], f(ret));
 		case TAnon(fields):
 			return TAnon([for( af in fields ) { name : af.name, opt : af.opt, t : f(af.t) }]);
+		case TLazy(l):
+			return f(l());
 		}
 	}
 
 	public function follow( t : TType ) {
 		return switch( t ) {
 		case TMono(r): if( r.r != null ) follow(r.r) else t;
-		case TType(t,args): apply(t.t, t.params, args);
+		case TType(t,args): follow(apply(t.t, t.params, args));
 		case TNull(t): follow(t);
+		case TLazy(f): follow(f());
 		default: t;
 		}
 	}
@@ -590,7 +714,7 @@ class Checker {
 		return fields;
 	}
 
-	function getField( t : TType, f : String, e : Expr ) {
+	function getField( t : TType, f : String, e : Expr, forWrite = false ) {
 		switch( follow(t) ) {
 		case TInst(c, args):
 			var cf = c.fields.get(f);
@@ -598,19 +722,23 @@ class Checker {
 				cf = c.fields.get("a_"+f);
 				if( cf != null ) {
 					var isPublic = true; // consider a_ prefixed as script specific
-					cf = { isPublic : isPublic, params : cf.params, name : cf.name, t : unasync(cf.t) };
+					cf = { isPublic : isPublic, canWrite : false, params : cf.params, name : cf.name, t : unasync(cf.t), complete : cf.complete };
 					if( cf.t == null ) cf = null;
 				}
 			}
 			if( cf == null ) {
 				if( c.superClass == null ) return null;
-				var ft = getField(c.superClass, f, e);
+				var ft = getField(c.superClass, f, e, forWrite);
 				if( ft != null ) ft = apply(ft, c.params, args);
 				return ft;
 			}
 			if( !cf.isPublic )
 				error("Can't access private field "+f+" on "+c.name, e);
-			return apply(cf.t, c.params, args);
+			if( forWrite && !cf.canWrite )
+				error("Can't write readonly field "+f+" on "+c.name, e);
+			var t = cf.t;
+			if( cf.params != null ) t = apply(t, cf.params, [for( i in 0...cf.params.length ) makeMono()]);
+			return apply(t, c.params, args);
 		case TDynamic:
 			return makeMono();
 		case TAnon(fields):
@@ -663,7 +791,28 @@ class Checker {
 		return t.match(TInst({name:"String"},_));
 	}
 
+	function onCompletion( expr : Expr, t : TType ) {
+		if( isCompletion ) throw new Completion(expr, t);
+	}
+
+	function typeField( o : Expr, f : String, expr : Expr, forWrite : Bool ) {
+		var ot = typeExpr(o, Value);
+		if( f == null )
+			onCompletion(expr, ot);
+		var ft = getField(ot, f, expr, forWrite);
+		if( ft == null ) {
+			error(typeStr(ot)+" has no field "+f, expr);
+			ft = TDynamic;
+		}
+		return ft;
+	}
+
 	function typeExpr( expr : Expr, withType : WithType ) : TType {
+		if( expr == null && isCompletion )
+			return switch( withType ) {
+			case WithType(t): t;
+			default: TDynamic;
+			}
 		switch( edef(expr) ) {
 		case EConst(c):
 			return switch (c) {
@@ -675,7 +824,12 @@ class Checker {
 			var l = locals.get(v);
 			if( l != null ) return l;
 			var g = globals.get(v);
-			if( g != null ) return g;
+			if( g != null ) {
+				return switch( g ) {
+				case TLazy(f): f();
+				default: g;
+				}
+			}
 			if( allowAsync ) {
 				g = globals.get("a_"+v);
 				if( g != null ) g = unasync(g);
@@ -689,6 +843,7 @@ class Checker {
 			case "trace":
 				return TDynamic;
 			default:
+				if( isCompletion) return TDynamic;
 				error("Unknown identifier "+v, expr);
 			}
 		case EBlock(el):
@@ -714,32 +869,34 @@ class Checker {
 			case TFun(args, ret):
 				for( i in 0...params.length ) {
 					var a = args[i];
-					if( a == null ) error("Too many arguments", params[i]);
-					var t = typeExpr(params[i], WithType(a.t));
+					if( a == null ) {
+						error("Too many arguments", params[i]);
+						break;
+					}
+					var t = typeExpr(params[i], a == null ? Value : WithType(a.t));
 					unify(t, a.t, params[i]);
 				}
 				for( i in params.length...args.length )
 					if( !args[i].opt )
-						error("Missing argument '"+args[i].name+"'", expr);
+						error("Missing argument "+args[i].name+":"+typeStr(args[i].t), expr);
 				return ret;
 			case TDynamic:
 				for( p in params ) typeExpr(p,Value);
-				return TDynamic;
+				return makeMono();
 			default:
 				error(typeStr(ft)+" cannot be called", e);
+				return makeMono();
 			}
 		case EField(o, f):
-			var ot = typeExpr(o, Value);
-			var ft = getField(ot, f, expr);
-			if( ft == null )
-				error(typeStr(ot)+" has no field "+f, expr);
-			return ft;
+			return typeField(o,f,expr,false);
 		case ECheckType(v, t):
 			var ct = makeType(t, expr);
 			var vt = typeExpr(v, WithType(ct));
 			unify(vt, ct, v);
 			return ct;
-		case EMeta(_, _, e):
+		case EMeta(m, _, e):
+			if( m == ":untyped" && allowUntypedMeta )
+				return makeMono();
 			return typeExpr(e, withType);
 		case EIf(cond, e1, e2), ETernary(cond, e1, e2):
 			typeExprWith(cond, TBool);
@@ -764,8 +921,11 @@ class Checker {
 				var map = [for( f in tfields ) f.name => f];
 				return TAnon([for( f in fl ) {
 					var ft = map.get(f.name);
-					if( ft == null ) error("Extra field "+f.name, f.e);
-					{ t : typeExprWith(f.e, ft.t), opt : false, name : f.name }
+					var ft = if( ft == null ) {
+						error("Extra field "+f.name, f.e);
+						TDynamic;
+					} else ft.t;
+					{ t : typeExprWith(f.e, ft), opt : false, name : f.name }
 				}]);
 			default:
 				return TAnon([for( f in fl ) { t : typeExpr(f.e, Value), opt : false, name : f.name }]);
@@ -778,7 +938,7 @@ class Checker {
 				error("Return not allowed here", expr);
 			else
 				unify(et, allowReturn, v == null ? expr : v);
-			return TDynamic;
+			return makeMono();
 		case EArrayDecl(el):
 			var et = null;
 			for( v in el ) {
@@ -787,7 +947,7 @@ class Checker {
 					if( tryUnify(et,t) ) et = t else unify(t,et,v);
 				}
 			}
-			if( et == null ) et = TDynamic;
+			if( et == null ) et = makeMono();
 			return types.getType("Array",[et]);
 		case EArray(a, index):
 			typeExprWith(index, TInt);
@@ -798,12 +958,26 @@ class Checker {
 			}
 		case EThrow(e):
 			typeExpr(e, Value);
-			return TDynamic;
+			return makeMono();
 		case EFunction(args, body, name, ret):
-			var tret = ret == null ? makeMono() : makeType(ret, expr);
+			var ft = null, tret = null, targs = null;
+			if( currentFunType != null ) {
+				switch( currentFunType ) {
+				case TFun(args,ret):
+					ft = currentFunType;
+					tret = ret; targs = args;
+				default:
+					throw "assert";
+				}
+				currentFunType = null;
+			} else {
+				tret = ret == null ? makeMono() : makeType(ret, expr);
+			}
 			var locals = saveLocals();
 			var oldRet = allowReturn;
+			var oldGDef = allowDefine;
 			allowReturn = tret;
+			allowDefine = false;
 			var withArgs = null;
 			if( name != null && !withType.match(WithType(follow(_) => TFun(_))) ) {
 				var ev = events.get(name);
@@ -813,26 +987,33 @@ class Checker {
 			case WithType(follow(_) => TFun(args,ret)): withArgs = args; unify(tret,ret,expr);
 			default:
 			}
-			var targs = [for( i in 0...args.length ) {
-				var a = args[i];
-				var at = a.t == null ? makeMono() : makeType(a.t, expr);
-				if( withArgs != null && withArgs.length > i )
-					unify(withArgs[i].t, at, expr);
-				this.locals.set(a.name, at);
-				{ name : a.name, opt : a.opt, t : at };
-			}];
-
+			if( targs == null )
+				targs = typeArgs(args,expr);
+			for( i in 0...targs.length ) {
+				var a = targs[i];
+				if( withArgs != null ) {
+					if( i < withArgs.length )
+						unify(withArgs[i].t, a.t, expr);
+					else
+						error("Extra argument "+a.name, expr);
+				}
+				this.locals.set(a.name, a.t);
+			}
+			if( withArgs != null && targs.length < withArgs.length )
+				error("Missing "+(withArgs.length - targs.length)+" arguments ("+[for( i in targs.length...withArgs.length ) typeStr(withArgs[i].t)].join(",")+")", expr);
 			typeExpr(body,NoValue);
+			allowDefine = oldGDef;
 			allowReturn = oldRet;
 			this.locals = locals;
-			var ft = TFun(targs,tret);
-			if( name != null )
+			if( ft == null ) {
+				ft = TFun(targs, tret);
 				locals.set(name, ft);
+			}
 			return ft;
 		case EUnop(op, _, e):
 			var et = typeExpr(e, Value);
 			switch( op ) {
-			case "++", "--":
+			case "++", "--", "-":
 				unify(et,TInt,e);
 				return et;
 			case "!":
@@ -847,13 +1028,27 @@ class Checker {
 			case TInst({name:"Array"},[t]):
 				t;
 			default:
+				var ft = getField(itt,"iterator", it);
+				if( ft == null )
+					switch( itt ) {
+					case TAbstract(a, args):
+						// special case : we allow unconditional access
+						// to an abstract iterator() underlying value (eg: ArrayProxy)
+						ft = getField(apply(a.t,a.params,args),"iterator",it);
+					default:
+					}
+				if( ft != null )
+					switch( ft ) {
+					case TFun([],ret): ft = ret;
+					default: ft = null;
+					}
 				var t = makeMono();
 				var iter = makeIterator(t);
-				unify(itt,iter,it);
+				unify(ft != null ? ft : itt,iter,it);
 				t;
 			}
 			this.locals.set(v, vt);
-			typeExpr(e, Value);
+			typeExpr(e, NoValue);
 			this.locals = locals;
 			return TVoid;
 		case EBinop(op, e1, e2):
@@ -863,7 +1058,19 @@ class Checker {
 				typeExprWith(e2,TInt);
 				return TInt;
 			case "=":
-				var vt = typeExpr(e1, Value);
+				if( allowDefine ) {
+					switch( edef(e1) ) {
+					case EIdent(i) if( !locals.exists(i) && !globals.exists(i) ):
+						var vt = typeExpr(e2,Value);
+						locals.set(i, vt);
+						return vt;
+					default:
+					}
+				}
+				var vt = switch( edef(e1) ) {
+				case EField(o,f): typeField(o, f, e1, true);
+				default: typeExpr(e1,Value);
+				}
 				typeExprWith(e2,vt);
 				return vt;
 			case "+":
@@ -930,11 +1137,48 @@ class Checker {
 				}
 				error("Unsupported operation "+op, expr);
 			}
+		case ETry(etry, v, et, ecatch):
+			var vt = typeExpr(etry, withType);
+
+			var old = locals.get(v);
+			locals.set(v, makeType(et, ecatch));
+			var ct = typeExpr(ecatch, withType);
+			if( old != null ) locals.set(v,old) else locals.remove(v);
+
+			if( withType == NoValue )
+				return TVoid;
+			if( tryUnify(vt,ct) )
+				return ct;
+			unify(ct,vt,ecatch);
+			return vt;
+		case ESwitch(value, cases, defaultExpr):
+			var tmin = null;
+			var vt = typeExpr(value, Value);
+			inline function mergeType(t,p) {
+				if( withType != NoValue ) {
+					if( tmin == null )
+						tmin = t;
+					else if( !tryUnify(t,tmin) ) {
+						unify(tmin,t, p);
+						tmin = t;
+					}
+				}
+			}
+			for( c in cases ) {
+				for( v in c.values ) {
+					var ct = typeExpr(v, WithType(vt));
+					unify(ct, vt, v);
+				}
+				var et = typeExpr(c.expr, withType);
+				mergeType(et, c.expr);
+			}
+			if( defaultExpr != null )
+				mergeType( typeExpr(defaultExpr, withType), defaultExpr);
+			return withType == NoValue ? TVoid : tmin == null ? makeMono() : tmin;
 		case ENew(cl, params):
-		case ETry(e, v, t, ecatch):
-		case ESwitch(e, cases, defaultExpr):
 		}
 		error("Don't know how to type "+edef(expr).getName(), expr);
+		return TDynamic;
 	}
 
 }

hscript/Interp.hx

@@ -52,13 +52,22 @@ class Interp {
 
 	public function new() {
 		#if haxe3
-		variables = new Map<String,Dynamic>();
 		locals = new Map();
 		#else
-		variables = new Hash();
 		locals = new Hash();
 		#end
 		declared = new Array();
+		resetVariables();
+		initOps();
+	}
+
+	private function resetVariables(){
+		#if haxe3
+		variables = new Map<String,Dynamic>();
+		#else
+		variables = new Hash();
+		#end
+		
 		variables.set("null",null);
 		variables.set("true",true);
 		variables.set("false",false);
@@ -68,7 +77,6 @@ class Interp {
 			if( el.length > 0 ) inf.customParams = el;
 			haxe.Log.trace(Std.string(v), inf);
 		}));
-		initOps();
 	}
 
 	public function posInfos(): PosInfos {
@@ -400,11 +408,11 @@ class Interp {
 				else
 					minParams++;
 			var f = function(args:Array<Dynamic>) {
-				if( args.length != params.length ) {
+				if( ( (args == null) ? 0 : args.length ) != params.length ) {
 					if( args.length < minParams ) {
 						var str = "Invalid number of parameters. Got " + args.length + ", required " + minParams;
 						if( name != null ) str += " for function '" + name+"'";
-						throw str;
+						error(ECustom(str));
 					}
 					// make sure mandatory args are forced
 					var args2 = [];

hscript/Macro.hx

@@ -214,7 +214,7 @@ class Macro {
 						opt : false,
 						value : null,
 					});
-				EFunction(name, {
+				EFunction(#if haxe4 FNamed(name,false) #else name #end, {
 					params : [],
 					args : targs,
 					expr : convert(e),

hscript/Parser.hx

@@ -78,8 +78,15 @@ class Parser {
 	**/
 	public var allowMetadata : Bool;
 
+	/**
+		resume from parsing errors (when parsing incomplete code, during completion for example)
+	**/
+	public var resumeErrors : Bool;
+
 	// implementation
-	var input : haxe.io.Input;
+	var input : String;
+	var readPos : Int;
+
 	var char : Int;
 	var ops : Array<Bool>;
 	var idents : Array<Bool>;
@@ -87,7 +94,6 @@ class Parser {
 
 	#if hscriptPos
 	var origin : String;
-	var readPos : Int;
 	var tokenMin : Int;
 	var tokenMax : Int;
 	var oldTokenMin : Int;
@@ -95,7 +101,6 @@ class Parser {
 	var tokens : List<{ min : Int, max : Int, t : Token }>;
 	#else
 	static inline var p1 = 0;
-	static inline var readPos = 0;
 	static inline var tokenMin = 0;
 	static inline var tokenMax = 0;
 	#if haxe3
@@ -142,6 +147,7 @@ class Parser {
 	}
 
 	public inline function error( err, pmin, pmax ) {
+		if( !resumeErrors )
 		#if hscriptPos
 		throw new Error(err, pmin, pmax, origin, line);
 		#else
@@ -178,12 +184,9 @@ class Parser {
 	}
 
 	public function parseString( s : String, ?origin : String = "hscript" ) {
-		return parse( new haxe.io.StringInput(s), origin );
-	}
-
-	public function parse( s : haxe.io.Input, ?origin : String = "hscript" ) {
 		initParser(origin);
 		input = s;
+		readPos = 0;
 		var a = new Array();
 		while( true ) {
 			var tk = token();
@@ -247,7 +250,7 @@ class Parser {
 
 	inline function pmin(e:Expr) {
 		#if hscriptPos
-		return e.pmin;
+		return e == null ? 0 : e.pmin;
 		#else
 		return 0;
 		#end
@@ -255,7 +258,7 @@ class Parser {
 
 	inline function pmax(e:Expr) {
 		#if hscriptPos
-		return e.pmax;
+		return e == null ? 0 : e.pmax;
 		#else
 		return 0;
 		#end
@@ -273,6 +276,7 @@ class Parser {
 	}
 
 	function isBlock(e) {
+		if( e == null ) return false;
 		return switch( expr(e) ) {
 		case EBlock(_), EObject(_), ESwitch(_): true;
 		case EFunction(_,e,_,_): isBlock(e);
@@ -296,7 +300,7 @@ class Parser {
 
 		var tk = token();
 		// this is a hack to support var a,b,c; with a single EVar
-		while( tk == TComma && expr(e).match(EVar(_)) ) {
+		while( tk == TComma && e != null && expr(e).match(EVar(_)) ) {
 			e = parseStructure("var"); // next variable
 			exprs.push(e);
 			tk = token();
@@ -329,6 +333,7 @@ class Parser {
 				break;
 			default:
 				unexpected(tk);
+				break;
 			}
 			ensure(TDoubleDot);
 			fl.push({ name : id, e : parseExpr() });
@@ -422,7 +427,7 @@ class Parser {
 			while( true ) {
 				parseFullExpr(a);
 				tk = token();
-				if( tk == TBrClose )
+				if( tk == TBrClose || (resumeErrors && tk == TEof) )
 					break;
 				push(tk);
 			}
@@ -431,7 +436,7 @@ class Parser {
 			if( unops.exists(op) ) {
 				var start = tokenMin;
 				var e = parseExpr();
-				if( op == "-" )
+				if( op == "-" && e != null )
 					switch( expr(e) ) {
 					case EConst(CInt(i)):
 						return mk(EConst(CInt(-i)), start, pmax(e));
@@ -445,14 +450,14 @@ class Parser {
 		case TBkOpen:
 			var a = new Array();
 			tk = token();
-			while( tk != TBkClose ) {
+			while( tk != TBkClose && (!resumeErrors || tk != TEof) ) {
 				push(tk);
 				a.push(parseExpr());
 				tk = token();
 				if( tk == TComma )
 					tk = token();
 			}
-			if( a.length == 1 )
+			if( a.length == 1 && a[0] != null )
 				switch( expr(a[0]) ) {
 				case EFor(_), EWhile(_), EDoWhile(_):
 					var tmp = "__a_" + (uid++);
@@ -485,6 +490,7 @@ class Parser {
 				break;
 			default:
 				unexpected(tk);
+				break;
 			}
 		}
 		ensureToken(TOp("->"));
@@ -517,6 +523,7 @@ class Parser {
 	}
 
 	function mapCompr( tmp : String, e : Expr ) {
+		if( e == null ) return null;
 		var edef = switch( expr(e) ) {
 		case EFor(v, it, e2):
 			EFor(v, it, mapCompr(tmp, e2));
@@ -537,6 +544,8 @@ class Parser {
 	}
 
 	function makeUnop( op, e ) {
+		if( e == null && resumeErrors )
+			return null;
 		return switch( expr(e) ) {
 		case EBinop(bop, e1, e2): mk(EBinop(bop, makeUnop(op, e1), e2), pmin(e1), pmax(e2));
 		case ETernary(e1, e2, e3): mk(ETernary(makeUnop(op, e1), e2, e3), pmin(e1), pmax(e3));
@@ -545,6 +554,8 @@ class Parser {
 	}
 
 	function makeBinop( op, e1, e ) {
+		if( e == null && resumeErrors )
+			return mk(EBinop(op,e1,e),pmin(e1),pmax(e1));
 		return switch( expr(e) ) {
 		case EBinop(op2,e2,e3):
 			if( opPriority.get(op) <= opPriority.get(op2) && !opRightAssoc.exists(op) )
@@ -644,16 +655,16 @@ class Parser {
 		case "new":
 			var a = new Array();
 			a.push(getIdent());
-			var next = true;
-			while( next ) {
+			while( true ) {
 				var tk = token();
 				switch( tk ) {
 				case TDot:
 					a.push(getIdent());
 				case TPOpen:
-					next = false;
+					break;
 				default:
 					unexpected(tk);
+					break;
 				}
 			}
 			var args = parseExprList(TPClose);
@@ -696,6 +707,7 @@ class Parser {
 							break;
 						default:
 							unexpected(tk);
+							break;
 						}
 					}
 					var exprs = [];
@@ -705,6 +717,8 @@ class Parser {
 						switch( tk ) {
 						case TId("case"), TId("default"), TBrClose:
 							break;
+						case TEof if( resumeErrors ):
+							break;
 						default:
 							parseFullExpr(exprs);
 						}
@@ -725,6 +739,8 @@ class Parser {
 						switch( tk ) {
 						case TId("case"), TId("default"), TBrClose:
 							break;
+						case TEof if( resumeErrors ):
+							break;
 						default:
 							parseFullExpr(exprs);
 						}
@@ -739,6 +755,7 @@ class Parser {
 					break;
 				default:
 					unexpected(tk);
+					break;
 				}
 			}
 			mk(ESwitch(e, cases, def), p1, tokenMax);
@@ -809,7 +826,9 @@ class Parser {
 				}
 				switch( tk ) {
 				case TId(id): name = id;
-				default: unexpected(tk);
+				default:
+					unexpected(tk);
+					break;
 				}
 				var arg : Argument = { name : name };
 				args.push(arg);
@@ -830,8 +849,8 @@ class Parser {
 					unexpected(tk);
 				}
 			}
-		}	
-		return args;	
+		}
+		return args;
 	}
 
 	function parseFunctionDecl() {
@@ -891,6 +910,7 @@ class Parser {
 						default:
 						}
 						unexpected(t);
+						break;
 					}
 				} else
 					push(t);
@@ -901,13 +921,13 @@ class Parser {
 		case TPOpen:
 			var a = token(),
 					b = token();
-			
-			push(b); 
+
+			push(b);
 			push(a);
 
 			function withReturn(args) {
 				switch token() { // I think it wouldn't hurt if ensure used enumEq
-					case TOp('->'): 
+					case TOp('->'):
 					case t: unexpected(t);
 				}
 
@@ -916,7 +936,7 @@ class Parser {
 
 			switch [a, b] {
 				case [TPClose, _] | [TId(_), TDoubleDot]:
-					
+
 					var args = [for (arg in parseFunctionArgs()) {
 						switch arg.value {
 							case null:
@@ -929,12 +949,12 @@ class Parser {
 
 					return withReturn(args);
 				default:
-					
+
 					var t = parseType();
 					return switch token() {
 						case TComma:
 							var args = [t];
-							
+
 							while (true) {
 								args.push(parseType());
 								if (!maybe(TComma)) break;
@@ -973,6 +993,7 @@ class Parser {
 					meta.push({ name : name, params : parseMetaArgs() });
 				default:
 					unexpected(t);
+					break;
 				}
 			}
 			return parseTypeNext(CTAnon(fields));
@@ -1017,6 +1038,7 @@ class Parser {
 			default:
 				if( tk == etk ) break;
 				unexpected(tk);
+				break;
 			}
 		}
 		return args;
@@ -1026,7 +1048,8 @@ class Parser {
 
 	public function parseModule( content : String, ?origin : String = "hscript" ) {
 		initParser(origin);
-		this.input = new haxe.io.StringInput(content);
+		input = content;
+		readPos = 0;
 		allowTypes = true;
 		allowMetadata = true;
 		var decls = [];
@@ -1219,6 +1242,7 @@ class Parser {
 				};
 			default:
 				unexpected(TId(id));
+				break;
 			}
 		}
 		return null;
@@ -1226,20 +1250,13 @@ class Parser {
 
 	// ------------------------ lexing -------------------------------
 
-	inline function incPos() {
-		#if hscriptPos
-		readPos++;
-		#end
-	}
-
-	function readChar() {
-		incPos();
-		return try input.readByte() catch( e : Dynamic ) 0;
+	inline function readChar() {
+		return StringTools.fastCodeAt(input, readPos++);
 	}
 
 	function readString( until ) {
 		var c = 0;
-		var b = new haxe.io.BytesOutput();
+		var b = new StringBuf();
 		var esc = false;
 		var old = line;
 		var s = input;
@@ -1247,38 +1264,26 @@ class Parser {
 		var p1 = readPos - 1;
 		#end
 		while( true ) {
-			try {
-				incPos();
-				c = s.readByte();
-			} catch( e : Dynamic ) {
+			var c = readChar();
+			if( StringTools.isEof(c) ) {
 				line = old;
 				error(EUnterminatedString, p1, p1);
+				break;
 			}
 			if( esc ) {
 				esc = false;
 				switch( c ) {
-				case 'n'.code: b.writeByte(10);
-				case 'r'.code: b.writeByte(13);
-				case 't'.code: b.writeByte(9);
-				case "'".code, '"'.code, '\\'.code: b.writeByte(c);
-				case '/'.code: if( allowJSON ) b.writeByte(c) else invalidChar(c);
+				case 'n'.code: b.addChar('\n'.code);
+				case 'r'.code: b.addChar('\r'.code);
+				case 't'.code: b.addChar('\t'.code);
+				case "'".code, '"'.code, '\\'.code: b.addChar(c);
+				case '/'.code: if( allowJSON ) b.addChar(c) else invalidChar(c);
 				case "u".code:
 					if( !allowJSON ) invalidChar(c);
-					var code = null;
-					try {
-						incPos();
-						incPos();
-						incPos();
-						incPos();
-						code = s.readString(4);
-					} catch( e : Dynamic ) {
-						line = old;
-						error(EUnterminatedString, p1, p1);
-					}
 					var k = 0;
 					for( i in 0...4 ) {
 						k <<= 4;
-						var char = code.charCodeAt(i);
+						var char = readChar();
 						switch( char ) {
 						case 48,49,50,51,52,53,54,55,56,57: // 0-9
 							k += char - 48;
@@ -1287,20 +1292,14 @@ class Parser {
 						case 97,98,99,100,101,102: // a-f
 							k += char - 87;
 						default:
+							if( StringTools.isEof(char) ) {
+								line = old;
+								error(EUnterminatedString, p1, p1);
+							}
 							invalidChar(char);
 						}
 					}
-					// encode k in UTF8
-					if( k <= 0x7F )
-						b.writeByte(k);
-					else if( k <= 0x7FF ) {
-						b.writeByte( 0xC0 | (k >> 6));
-						b.writeByte( 0x80 | (k & 63));
-					} else {
-						b.writeByte( 0xE0 | (k >> 12) );
-						b.writeByte( 0x80 | ((k >> 6) & 63) );
-						b.writeByte( 0x80 | (k & 63) );
-					}
+					b.addChar(k);
 				default: invalidChar(c);
 				}
 			} else if( c == 92 )
@@ -1309,10 +1308,10 @@ class Parser {
 				break;
 			else {
 				if( c == 10 ) line++;
-				b.writeByte(c);
+				b.addChar(c);
 			}
 		}
-		return b.getBytes().toString();
+		return b.toString();
 	}
 
 	function token() {
@@ -1344,8 +1343,13 @@ class Parser {
 			this.char = -1;
 		}
 		while( true ) {
+			if( StringTools.isEof(char) ) {
+				this.char = char;
+				return TEof;
+			}
 			switch( char ) {
-			case 0: return TEof;
+			case 0:
+				return TEof;
 			case 32,9,13: // space, tab, CR
 				#if hscriptPos
 				tokenMin++;
@@ -1517,6 +1521,7 @@ class Parser {
 					var prev = -1;
 					while( true ) {
 						char = readChar();
+						if( StringTools.isEof(char) ) char = 0;
 						if( !ops[char] || prev == '='.code ) {
 							if( op.charCodeAt(0) == '/'.code )
 								return tokenComment(op,char);
@@ -1531,6 +1536,7 @@ class Parser {
 					var id = String.fromCharCode(char);
 					while( true ) {
 						char = readChar();
+						if( StringTools.isEof(char) ) char = 0;
 						if( !idents[char] ) {
 							this.char = char;
 							return TId(id);
@@ -1636,14 +1642,11 @@ class Parser {
 		var c = op.charCodeAt(1);
 		var s = input;
 		if( c == '/'.code ) { // comment
-			try {
-				while( char != '\r'.code && char != '\n'.code ) {
-					incPos();
-					char = s.readByte();
-				}
-				this.char = char;
-			} catch( e : Dynamic ) {
+			while( char != '\r'.code && char != '\n'.code ) {
+				char = readChar();
+				if( StringTools.isEof(char) ) break;
 			}
+			this.char = char;
 			return token();
 		}
 		if( c == '*'.code ) { /* comment */
@@ -1652,21 +1655,24 @@ class Parser {
 				this.char = char;
 				return token();
 			}
-			try {
-				while( true ) {
-					while( char != '*'.code ) {
-						if( char == '\n'.code ) line++;
-						incPos();
-						char = s.readByte();
-					}
-					incPos();
-					char = s.readByte();
-					if( char == '/'.code )
+			while( true ) {
+				while( char != '*'.code ) {
+					if( char == '\n'.code ) line++;
+					char = readChar();
+					if( StringTools.isEof(char) ) {
+						line = old;
+						error(EUnterminatedComment, tokenMin, tokenMin);
 						break;
+					}
 				}
-			} catch( e : Dynamic ) {
-				line = old;
-				error(EUnterminatedComment, tokenMin, tokenMin);
+				char = readChar();
+				if( StringTools.isEof(char) ) {
+					line = old;
+					error(EUnterminatedComment, tokenMin, tokenMin);
+					break;
+				}
+				if( char == '/'.code )
+					break;
 			}
 			return token();
 		}

hscript/Printer.hx

@@ -48,7 +48,7 @@ class Printer {
 
 	function type( t : CType ) {
 		switch( t ) {
-		case CTOpt(t): 
+		case CTOpt(t):
 			add('?');
 			type(t);
 		case CTPath(path, params):
@@ -331,7 +331,7 @@ class Printer {
 
 	public static function errorToString( e : Expr.Error ) {
 		var message = switch( #if hscriptPos e.e #else e #end ) {
-			case EInvalidChar(c): "Invalid character: '"+String.fromCharCode(c)+"' ("+c+")";
+			case EInvalidChar(c): "Invalid character: '"+(StringTools.isEof(c) ? "EOF" : String.fromCharCode(c))+"' ("+c+")";
 			case EUnexpected(s): "Unexpected token: \""+s+"\"";
 			case EUnterminatedString: "Unterminated string";
 			case EUnterminatedComment: "Unterminated comment";