Haxe, meet Lua

The next step is to let the Haxe compiler "know" about the new lua
target available via genlua.ml.  This involves adding genlua to the
Makefile, and introducing Lua as an enum for the purposes of various
command and platform behaviors.

At ths point, you can invoke "haxe -lua" just fine, but the resulting
code will complain about a lack of an std namespace for certain types.

We'll need to do something for std like we did for genlua... copy
existing js files over until the compiler is happy.  That's coming up
next.

Makefile

@@ -55,7 +55,7 @@ MODULES=syntax/ast typing/type syntax/lexer typing/common generators/genxml synt
 	optimization/optimizer typing/typeload generators/codegen generators/gencommon generators/genas3 \
 	generators/gencpp generators/genjs generators/genneko generators/genphp generators/genswf9 \
 	generators/genswf generators/genjava generators/gencs generators/genpy macro/interp generators/genhl \
-	optimization/dce optimization/analyzer optimization/filters typing/typer \
+	generators/genlua optimization/dce optimization/analyzer optimization/filters typing/typer \
 	typing/matcher version main
 
 ADD_REVISION?=0
@@ -152,6 +152,8 @@ src/generators/genjs.$(MODULE_EXT): src/typing/type.$(MODULE_EXT) src/optimizati
 
 src/generators/genneko.$(MODULE_EXT): src/typing/type.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT)
 
+src/generators/genlua.$(MODULE_EXT): src/typing/type.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT)
+
 src/generators/genphp.$(MODULE_EXT): src/typing/type.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT)
 
 src/generators/genpy.$(MODULE_EXT): src/typing/type.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT)
@@ -168,7 +170,7 @@ src/macro/interp.$(MODULE_EXT): src/typing/typecore.$(MODULE_EXT) src/typing/typ
 
 src/typing/matcher.$(MODULE_EXT): src/optimization/optimizer.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/typing/typecore.$(MODULE_EXT) src/typing/type.$(MODULE_EXT) src/typing/typer.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT)
 
-src/main.$(MODULE_EXT): src/optimization/filters.$(MODULE_EXT) src/typing/matcher.$(MODULE_EXT) src/typing/typer.$(MODULE_EXT) src/typing/typeload.$(MODULE_EXT) src/typing/typecore.$(MODULE_EXT) src/typing/type.$(MODULE_EXT) src/syntax/parser.$(MODULE_EXT) src/optimization/optimizer.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/macro/interp.$(MODULE_EXT) src/generators/genxml.$(MODULE_EXT) src/generators/genswf.$(MODULE_EXT) src/generators/genphp.$(MODULE_EXT) src/generators/genneko.$(MODULE_EXT) src/generators/genjs.$(MODULE_EXT) src/generators/gencpp.$(MODULE_EXT) src/generators/genas3.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT) src/generators/gencommon.$(MODULE_EXT) src/generators/genjava.$(MODULE_EXT) src/generators/gencs.$(MODULE_EXT) src/generators/genpy.$(MODULE_EXT) src/generators/genhl.$(MODULE_EXT) src/version.$(MODULE_EXT) libs/ilib/il.$(LIB_EXT)
+src/main.$(MODULE_EXT): src/optimization/filters.$(MODULE_EXT) src/typing/matcher.$(MODULE_EXT) src/typing/typer.$(MODULE_EXT) src/typing/typeload.$(MODULE_EXT) src/typing/typecore.$(MODULE_EXT) src/typing/type.$(MODULE_EXT) src/syntax/parser.$(MODULE_EXT) src/optimization/optimizer.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/macro/interp.$(MODULE_EXT) src/generators/genxml.$(MODULE_EXT) src/generators/genswf.$(MODULE_EXT) src/generators/genphp.$(MODULE_EXT) src/generators/genneko.$(MODULE_EXT) src/generators/genjs.$(MODULE_EXT) src/generators/genlua.$(MODULE_EXT) src/generators/gencpp.$(MODULE_EXT) src/generators/genas3.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT) src/generators/gencommon.$(MODULE_EXT) src/generators/genjava.$(MODULE_EXT) src/generators/gencs.$(MODULE_EXT) src/generators/genpy.$(MODULE_EXT) src/generators/genhl.$(MODULE_EXT) src/version.$(MODULE_EXT) libs/ilib/il.$(LIB_EXT)
 
 src/optimization/optimizer.$(MODULE_EXT): src/typing/typecore.$(MODULE_EXT) src/typing/type.$(MODULE_EXT) src/syntax/parser.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT)
 
@@ -181,7 +183,8 @@ src/typing/typecore.$(MODULE_EXT): src/typing/type.$(MODULE_EXT) src/typing/comm
 
 src/typing/typeload.$(MODULE_EXT): src/typing/typecore.$(MODULE_EXT) src/typing/type.$(MODULE_EXT) src/syntax/parser.$(MODULE_EXT) src/optimization/optimizer.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT)
 
-src/typing/typer.$(MODULE_EXT): src/typing/typeload.$(MODULE_EXT) src/typing/typecore.$(MODULE_EXT) src/typing/type.$(MODULE_EXT) src/syntax/parser.$(MODULE_EXT) src/optimization/optimizer.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/macro/interp.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT) src/optimization/filters.$(MODULE_EXT) src/generators/gencommon.$(MODULE_EXT) src/generators/genjs.$(MODULE_EXT)
+src/typing/typer.$(MODULE_EXT): src/typing/typeload.$(MODULE_EXT) src/typing/typecore.$(MODULE_EXT) src/typing/type.$(MODULE_EXT) src/syntax/parser.$(MODULE_EXT) src/optimization/optimizer.$(MODULE_EXT) src/syntax/lexer.$(MODULE_EXT) src/macro/interp.$(MODULE_EXT) src/typing/common.$(MODULE_EXT) src/generators/codegen.$(MODULE_EXT) src/syntax/ast.$(MODULE_EXT) src/optimization/filters.$(MODULE_EXT) src/generators/gencommon.$(MODULE_EXT) src/generators/genjs.$(MODULE_EXT) src/generators/genlua.$(MODULE_EXT)
+
 
 src/syntax/lexer.$(MODULE_EXT): src/syntax/lexer.ml src/syntax/ast.$(MODULE_EXT)
 

src/main.ml

@@ -165,7 +165,7 @@ let htmlescape s =
 	s
 
 let reserved_flags = [
-	"cross";"js";"neko";"flash";"php";"cpp";"cs";"java";"python";
+	"cross";"js";"lua";"neko";"flash";"php";"cpp";"cs";"java";"python";
 	"as3";"swc";"macro";"sys"
 	]
 
@@ -988,7 +988,7 @@ and do_connect host port args =
 
 and init ctx =
 	let usage = Printf.sprintf
-		"Haxe Compiler %s - (C)2005-2016 Haxe Foundation\n Usage : haxe%s -main <class> [-swf|-js|-neko|-php|-cpp|-as3|-cs|-java|-python|-hl] <output> [options]\n Options :"
+		"Haxe Compiler %s - (C)2005-2016 Haxe Foundation\n Usage : haxe%s -main <class> [-swf|-js|-neko|-php|-cpp|-as3|-cs|-java|-python|-hl|-lua] <output> [options]\n Options :"
 		s_version (if Sys.os_type = "Win32" then ".exe" else "")
 	in
 	let com = ctx.com in
@@ -1060,6 +1060,7 @@ try
 			com.class_path <- normalize_path path :: com.class_path
 		),"<path> : add a directory to find source files");
 		("-js",Arg.String (set_platform Js),"<file> : compile code to JavaScript file");
+		("-lua",Arg.String (set_platform Lua),"<file> : compile code to Lua file");
 		("-swf",Arg.String (set_platform Flash),"<file> : compile code to Flash SWF file");
 		("-as3",Arg.String (fun dir ->
 			set_platform Flash dir;
@@ -1456,6 +1457,9 @@ try
 				Common.define_value com Define.JqueryVer "11202";
 			add_std "js";
 			"js"
+		| Lua ->
+			add_std "lua";
+			"lua"
 		| Php ->
 			add_std "php";
 			"php"
@@ -1575,6 +1579,8 @@ try
 					Genneko.generate,"neko"
 				| Js ->
 					Genjs.generate,"js"
+				| Lua ->
+					Genlua.generate,"lua"
 				| Php ->
 					Genphp.generate,"php"
 				| Cpp ->

src/typing/common.ml

@@ -47,6 +47,7 @@ type stats = {
 type platform =
 	| Cross
 	| Js
+	| Lua
 	| Neko
 	| Flash
 	| Php
@@ -578,6 +579,20 @@ let get_config com =
 			pf_can_skip_non_nullable_argument = true;
 			pf_reserved_type_paths = [([],"Object");([],"Error")];
 		}
+	| Lua ->
+		{
+			pf_static = false;
+			pf_sys = false;
+			pf_locals_scope = false;
+			pf_captured_scope = false;
+			pf_unique_locals = false;
+			pf_capture_policy = CPLoopVars;
+			pf_pad_nulls = false;
+			pf_add_final_return = false;
+			pf_overload = false;
+			pf_pattern_matching = false;
+			pf_can_skip_non_nullable_argument = true;
+		}
 	| Neko ->
 		{
 			default_config with
@@ -795,6 +810,7 @@ let file_extension file =
 
 let platforms = [
 	Js;
+   Lua;
 	Neko;
 	Flash;
 	Php;
@@ -808,6 +824,7 @@ let platforms = [
 let platform_name = function
 	| Cross -> "cross"
 	| Js -> "js"
+	| Lua -> "lua"
 	| Neko -> "neko"
 	| Flash -> "flash"
 	| Php -> "php"