X-Git-Url: http://nitlanguage.org

diff --git a/src/compiler/abstract_compiler.nit b/src/compiler/abstract_compiler.nit
index 74ef262..b8e78a5 100644
--- a/src/compiler/abstract_compiler.nit
+++ b/src/compiler/abstract_compiler.nit
@@ -23,6 +23,7 @@ import platform
 import c_tools
 private import annotation
 import mixin
+import counter
 
 # Add compiling options
 redef class ToolContext
@@ -94,12 +95,12 @@ redef class ToolContext
 			# Default is nitstack
 			opt_stacktrace.value = "nitstack"
 		else
-			print "Error: unknown value `{st}` for --stacktrace. Use `none`, `libunwind`, `nitstack` or `auto`."
+			print "Option Error: unknown value `{st}` for --stacktrace. Use `none`, `libunwind`, `nitstack` or `auto`."
 			exit(1)
 		end
 
 		if opt_output.value != null and opt_dir.value != null then
-			print "Error: cannot use both --dir and --output"
+			print "Option Error: cannot use both --dir and --output"
 			exit(1)
 		end
 
@@ -114,58 +115,78 @@ redef class ToolContext
 end
 
 redef class ModelBuilder
-	# The compilation directory
-	var compile_dir: String
-
 	# Simple indirection to `Toolchain::write_and_make`
 	protected fun write_and_make(compiler: AbstractCompiler)
 	do
 		var platform = compiler.target_platform
-		var toolchain = platform.toolchain(toolcontext)
-		compile_dir = toolchain.compile_dir
-		toolchain.write_and_make compiler
+		var toolchain = platform.toolchain(toolcontext, compiler)
+		compiler.toolchain = toolchain
+		toolchain.write_and_make
 	end
 end
 
 redef class Platform
 	# The specific tool-chain associated to the platform
-	fun toolchain(toolcontext: ToolContext): Toolchain do return new MakefileToolchain(toolcontext)
+	fun toolchain(toolcontext: ToolContext, compiler: AbstractCompiler): Toolchain
+	do
+		return new MakefileToolchain(toolcontext, compiler)
+	end
 end
 
+# Build toolchain for a specific target program, varies per `Platform`
 class Toolchain
+
+	# Toolcontext
 	var toolcontext: ToolContext
 
-	fun compile_dir: String
+	# Compiler of the target program
+	var compiler: AbstractCompiler
+
+	# Directory where to generate all files
+	#
+	# The option `--compile_dir` change this directory.
+	fun root_compile_dir: String
 	do
 		var compile_dir = toolcontext.opt_compile_dir.value
-		if compile_dir == null then compile_dir = ".nit_compile"
+		if compile_dir == null then compile_dir = "nit_compile"
 		return compile_dir
 	end
 
-	fun write_and_make(compiler: AbstractCompiler) is abstract
+	# Directory where to generate all C files
+	#
+	# By default it is `root_compile_dir` but some platform may require that it is a subdirectory.
+	fun compile_dir: String do return root_compile_dir
+
+	# Write all C files and compile them
+	fun write_and_make is abstract
 end
 
+# Default toolchain using a Makefile
 class MakefileToolchain
 	super Toolchain
 
-	redef fun write_and_make(compiler)
+	redef fun write_and_make
 	do
 		var compile_dir = compile_dir
 
+		# Remove the compilation directory unless explicitly set
+		var auto_remove = toolcontext.opt_compile_dir.value == null
+
 		# Generate the .h and .c files
 		# A single C file regroups many compiled rumtime functions
 		# Note that we do not try to be clever an a small change in a Nit source file may change the content of all the generated .c files
 		var time0 = get_time
 		self.toolcontext.info("*** WRITING C ***", 1)
 
+		root_compile_dir.mkdir
 		compile_dir.mkdir
 
 		var cfiles = new Array[String]
-		write_files(compiler, compile_dir, cfiles)
+		write_files(compile_dir, cfiles)
 
 		# Generate the Makefile
 
-		write_makefile(compiler, compile_dir, cfiles)
+		write_makefile(compile_dir, cfiles)
 
 		var time1 = get_time
 		self.toolcontext.info("*** END WRITING C: {time1-time0} ***", 2)
@@ -177,13 +198,18 @@ class MakefileToolchain
 		time0 = time1
 		self.toolcontext.info("*** COMPILING C ***", 1)
 
-		compile_c_code(compiler, compile_dir)
+		compile_c_code(compile_dir)
+
+		if auto_remove then
+			sys.system("rm -r -- '{root_compile_dir.escape_to_sh}/'")
+		end
 
 		time1 = get_time
 		self.toolcontext.info("*** END COMPILING C: {time1-time0} ***", 2)
 	end
 
-	fun write_files(compiler: AbstractCompiler, compile_dir: String, cfiles: Array[String])
+	# Write all source files to the `compile_dir`
+	fun write_files(compile_dir: String, cfiles: Array[String])
 	do
 		var platform = compiler.target_platform
 		if self.toolcontext.opt_stacktrace.value == "nitstack" and platform.supports_libunwind then compiler.build_c_to_nit_bindings
@@ -280,17 +306,14 @@ class MakefileToolchain
 		self.toolcontext.info("Total C source files to compile: {cfiles.length}", 2)
 	end
 
-	fun makefile_name(mainmodule: MModule): String do return "{mainmodule.c_name}.mk"
+	# Get the name of the Makefile to use
+	fun makefile_name: String do return "{compiler.mainmodule.c_name}.mk"
 
-	fun default_outname(mainmodule: MModule): String
+	# Get the default name of the executable to produce
+	fun default_outname: String
 	do
-		# Search a non fictive module
-		var res = mainmodule.name
-		while mainmodule.is_fictive do
-			mainmodule = mainmodule.in_importation.direct_greaters.first
-			res = mainmodule.name
-		end
-		return res
+		var mainmodule = compiler.mainmodule.first_real_mmodule
+		return mainmodule.name
 	end
 
 	# Combine options and platform informations to get the final path of the outfile
@@ -298,13 +321,14 @@ class MakefileToolchain
 	do
 		var res = self.toolcontext.opt_output.value
 		if res != null then return res
-		res = default_outname(mainmodule)
+		res = default_outname
 		var dir = self.toolcontext.opt_dir.value
 		if dir != null then return dir.join_path(res)
 		return res
 	end
 
-	fun write_makefile(compiler: AbstractCompiler, compile_dir: String, cfiles: Array[String])
+	# Write the Makefile
+	fun write_makefile(compile_dir: String, cfiles: Array[String])
 	do
 		var mainmodule = compiler.mainmodule
 		var platform = compiler.target_platform
@@ -315,11 +339,11 @@ class MakefileToolchain
 		var outpath = real_outpath.escape_to_mk
 		if outpath != real_outpath then
 			# If the name is crazy and need escaping, we will do an indirection
-			# 1. generate the binary in the .nit_compile dir under an escaped name
+			# 1. generate the binary in the nit_compile dir under an escaped name
 			# 2. copy the binary at the right place in the `all` goal.
 			outpath = mainmodule.c_name
 		end
-		var makename = makefile_name(mainmodule)
+		var makename = makefile_name
 		var makepath = "{compile_dir}/{makename}"
 		var makefile = new FileWriter.open(makepath)
 
@@ -444,22 +468,25 @@ endif
 		makepath.file_copy_to "{compile_dir}/Makefile"
 	end
 
-	fun compile_c_code(compiler: AbstractCompiler, compile_dir: String)
+	# The C code is generated, compile it to an executable
+	fun compile_c_code(compile_dir: String)
 	do
-		var makename = makefile_name(compiler.mainmodule)
+		var makename = makefile_name
 
 		var makeflags = self.toolcontext.opt_make_flags.value
 		if makeflags == null then makeflags = ""
-		self.toolcontext.info("make -B -C {compile_dir} -f {makename} -j 4 {makeflags}", 2)
+
+		var command = "make -B -C {compile_dir} -f {makename} -j 4 {makeflags}"
+		self.toolcontext.info(command, 2)
 
 		var res
 		if self.toolcontext.verbose_level >= 3 then
-			res = sys.system("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1")
+			res = sys.system("{command} 2>&1")
 		else
-			res = sys.system("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1 >/dev/null")
+			res = sys.system("{command} 2>&1 >/dev/null")
 		end
 		if res != 0 then
-			toolcontext.error(null, "make failed! Error code: {res}.")
+			toolcontext.error(null, "Compilation Error: `make` failed with error code: {res}. The command was `{command}`.")
 		end
 	end
 end
@@ -481,6 +508,11 @@ abstract class AbstractCompiler
 	# The modelbuilder used to know the model and the AST
 	var modelbuilder: ModelBuilder is protected writable
 
+	# The associated toolchain
+	#
+	# Set by `modelbuilder.write_and_make` and permit sub-routines to access the current toolchain if required.
+	var toolchain: Toolchain is noinit
+
 	# Is hardening asked? (see --hardening)
 	fun hardening: Bool do return self.modelbuilder.toolcontext.opt_hardening.value
 
@@ -544,7 +576,7 @@ abstract class AbstractCompiler
 	# Binds the generated C function names to Nit function names
 	fun build_c_to_nit_bindings
 	do
-		var compile_dir = modelbuilder.compile_dir
+		var compile_dir = toolchain.compile_dir
 
 		var stream = new FileWriter.open("{compile_dir}/c_functions_hash.c")
 		stream.write("#include <string.h>\n")
@@ -676,7 +708,7 @@ extern void nitni_global_ref_decr( struct nitni_ref *ref );
 		var finalize_meth = mainmodule.try_get_primitive_method("finalize", finalizable_type.mclass)
 
 		if finalize_meth == null then
-			modelbuilder.toolcontext.error(null, "The `Finalizable` class doesn't declare the `finalize` method.")
+			modelbuilder.toolcontext.error(null, "Error: the `Finalizable` class does not declare the `finalize` method.")
 			return
 		end
 
@@ -1023,14 +1055,6 @@ extern void nitni_global_ref_decr( struct nitni_ref *ref ) {
 	end
 
 	fun finalize_ffi_for_module(mmodule: MModule) do mmodule.finalize_ffi(self)
-
-	# Division facility
-	# Avoid division by zero by returning the string "n/a"
-	fun div(a,b:Int):String
-	do
-		if b == 0 then return "n/a"
-		return ((a*10000/b).to_f / 100.0).to_precision(2)
-	end
 end
 
 # A file unit (may be more than one file if
@@ -1139,40 +1163,45 @@ abstract class AbstractCompilerVisitor
 	# Evaluate `args` as expressions in the call of `mpropdef` on `recv`.
 	# This method is used to manage varargs in signatures and returns the real array
 	# of runtime variables to use in the call.
-	fun varargize(mpropdef: MMethodDef, recv: RuntimeVariable, args: SequenceRead[AExpr]): Array[RuntimeVariable]
+	fun varargize(mpropdef: MMethodDef, map: nullable SignatureMap, recv: RuntimeVariable, args: SequenceRead[AExpr]): Array[RuntimeVariable]
 	do
 		var msignature = mpropdef.new_msignature or else mpropdef.msignature.as(not null)
 		var res = new Array[RuntimeVariable]
 		res.add(recv)
 
-		if args.is_empty then return res
+		if msignature.arity == 0 then return res
+
+		if map == null then
+			assert args.length == msignature.arity
+			for ne in args do
+				res.add self.expr(ne, null)
+			end
+			return res
+		end
 
-		var vararg_rank = msignature.vararg_rank
-		var vararg_len = args.length - msignature.arity
-		if vararg_len < 0 then vararg_len = 0
+		# Eval in order of arguments, not parameters
+		var exprs = new Array[RuntimeVariable].with_capacity(args.length)
+		for ne in args do
+			exprs.add self.expr(ne, null)
+		end
 
+		# Fill `res` with the result of the evaluation according to the mapping
 		for i in [0..msignature.arity[ do
-			if i == vararg_rank then
-				var ne = args[i]
-				if ne isa AVarargExpr then
-					var e = self.expr(ne.n_expr, null)
-					res.add(e)
-					continue
-				end
-				var vararg = new Array[RuntimeVariable]
-				for j in [vararg_rank..vararg_rank+vararg_len] do
-					var e = self.expr(args[j], null)
-					vararg.add(e)
-				end
-				var elttype = msignature.mparameters[vararg_rank].mtype
+			var param = msignature.mparameters[i]
+			var j = map.map.get_or_null(i)
+			if j == null then
+				# default value
+				res.add(null_instance)
+				continue
+			end
+			if param.is_vararg and map.vararg_decl > 0 then
+				var vararg = exprs.sub(j, map.vararg_decl)
+				var elttype = param.mtype
 				var arg = self.vararg_instance(mpropdef, recv, vararg, elttype)
 				res.add(arg)
-			else
-				var j = i
-				if i > vararg_rank then j += vararg_len
-				var e = self.expr(args[j], null)
-				res.add(e)
+				continue
 			end
+			res.add exprs[j]
 		end
 		return res
 	end
@@ -1443,6 +1472,14 @@ abstract class AbstractCompilerVisitor
 		return res
 	end
 
+	# Generate a byte value
+	fun byte_instance(value: Byte): RuntimeVariable
+	do
+		var t = mmodule.byte_type
+		var res = new RuntimeVariable("((unsigned char){value.to_s})", t, t)
+		return res
+	end
+
 	# Generate a char value
 	fun char_instance(value: Char): RuntimeVariable
 	do
@@ -1623,6 +1660,12 @@ abstract class AbstractCompilerVisitor
 	fun stmt(nexpr: nullable AExpr)
 	do
 		if nexpr == null then return
+		if nexpr.mtype == null and not nexpr.is_typed then
+			# Untyped expression.
+			# Might mean dead code
+			# So just return
+			return
+		end
 
 		var narray = nexpr.comprehension
 		if narray != null then
@@ -1642,6 +1685,13 @@ abstract class AbstractCompilerVisitor
 	# `mtype` is the expected return type, pass null if no specific type is expected.
 	fun expr(nexpr: AExpr, mtype: nullable MType): RuntimeVariable
 	do
+		if nexpr.mtype == null then
+			# Untyped expression.
+			# Might mean dead code
+			# so return a placebo result
+			if mtype == null then mtype = compiler.mainmodule.object_type
+			return new_var(mtype)
+		end
 		var old = self.current_node
 		self.current_node = nexpr
 		var res = nexpr.expr(self).as(not null)
@@ -1813,6 +1863,8 @@ redef class MClassType
 			return "char"
 		else if mclass.name == "Float" then
 			return "double"
+		else if mclass.name == "Byte" then
+			return "unsigned char"
 		else if mclass.name == "NativeString" then
 			return "char*"
 		else if mclass.name == "NativeArray" then
@@ -1843,6 +1895,8 @@ redef class MClassType
 			return "c"
 		else if mclass.name == "Float" then
 			return "d"
+		else if mclass.name == "Byte" then
+			return "b"
 		else if mclass.name == "NativeString" then
 			return "str"
 		else if mclass.name == "NativeArray" then
@@ -2033,6 +2087,9 @@ redef class AMethPropdef
 			else if pname == "unary -" then
 				v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
 				return true
+			else if pname == "unary +" then
+				v.ret(arguments[0])
+				return true
 			else if pname == "*" then
 				v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
 				return true
@@ -2070,6 +2127,9 @@ redef class AMethPropdef
 			else if pname == "to_f" then
 				v.ret(v.new_expr("(double){arguments[0]}", ret.as(not null)))
 				return true
+			else if pname == "to_b" then
+				v.ret(v.new_expr("(unsigned char){arguments[0]}", ret.as(not null)))
+				return true
 			else if pname == "ascii" then
 				v.ret(v.new_expr("{arguments[0]}", ret.as(not null)))
 				return true
@@ -2113,6 +2173,69 @@ redef class AMethPropdef
 				v.ret(v.new_expr("(unsigned char){arguments[0]}", ret.as(not null)))
 				return true
 			end
+		else if cname == "Byte" then
+			if pname == "output" then
+				v.add("printf(\"%x\\n\", {arguments.first});")
+				return true
+			else if pname == "object_id" then
+				v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
+				return true
+			else if pname == "+" then
+				v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "-" then
+				v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "unary -" then
+				v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
+				return true
+			else if pname == "unary +" then
+				v.ret(arguments[0])
+				return true
+			else if pname == "*" then
+				v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "/" then
+				v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "%" then
+				v.ret(v.new_expr("{arguments[0]} % {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "lshift" then
+				v.ret(v.new_expr("{arguments[0]} << {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "rshift" then
+				v.ret(v.new_expr("{arguments[0]} >> {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "==" then
+				v.ret(v.equal_test(arguments[0], arguments[1]))
+				return true
+			else if pname == "!=" then
+				var res = v.equal_test(arguments[0], arguments[1])
+				v.ret(v.new_expr("!{res}", ret.as(not null)))
+				return true
+			else if pname == "<" then
+				v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == ">" then
+				v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "<=" then
+				v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == ">=" then
+				v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
+				return true
+			else if pname == "to_i" then
+				v.ret(v.new_expr("(long){arguments[0]}", ret.as(not null)))
+				return true
+			else if pname == "to_f" then
+				v.ret(v.new_expr("(double){arguments[0]}", ret.as(not null)))
+				return true
+			else if pname == "ascii" then
+				v.ret(v.new_expr("{arguments[0]}", ret.as(not null)))
+				return true
+			end
 		else if cname == "Bool" then
 			if pname == "output" then
 				v.add("printf({arguments.first}?\"true\\n\":\"false\\n\");")
@@ -2144,6 +2267,9 @@ redef class AMethPropdef
 			else if pname == "unary -" then
 				v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
 				return true
+			else if pname == "unary +" then
+				v.ret(arguments[0])
+				return true
 			else if pname == "succ" then
 				v.ret(v.new_expr("{arguments[0]}+1", ret.as(not null)))
 				return true
@@ -2178,6 +2304,9 @@ redef class AMethPropdef
 			else if pname == "to_i" then
 				v.ret(v.new_expr("(long){arguments[0]}", ret.as(not null)))
 				return true
+			else if pname == "to_b" then
+				v.ret(v.new_expr("(unsigned char){arguments[0]}", ret.as(not null)))
+				return true
 			end
 		else if cname == "NativeString" then
 			if pname == "[]" then
@@ -2192,6 +2321,9 @@ redef class AMethPropdef
 			else if pname == "atoi" then
 				v.ret(v.new_expr("atoi({arguments[0]});", ret.as(not null)))
 				return true
+			else if pname == "fast_cstring" then
+				v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
+				return true
 			else if pname == "new" then
 				v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
 				return true
@@ -2312,7 +2444,7 @@ redef class AAttrPropdef
 			var res
 			if is_lazy then
 				var set
-				var ret = self.mpropdef.static_mtype
+				var ret = self.mtype
 				var useiset = not ret.is_c_primitive and not ret isa MNullableType
 				var guard = self.mlazypropdef.mproperty
 				if useiset then
@@ -2340,7 +2472,7 @@ redef class AAttrPropdef
 			assert arguments.length == 2
 			v.write_attribute(self.mpropdef.mproperty, arguments.first, arguments[1])
 			if is_lazy then
-				var ret = self.mpropdef.static_mtype
+				var ret = self.mtype
 				var useiset = not ret.is_c_primitive and not ret isa MNullableType
 				if not useiset then
 					v.write_attribute(self.mlazypropdef.mproperty, arguments.first, v.bool_instance(true))
@@ -2362,11 +2494,11 @@ redef class AAttrPropdef
 		var oldnode = v.current_node
 		v.current_node = self
 		var old_frame = v.frame
-		var frame = new StaticFrame(v, self.mpropdef.as(not null), recv.mcasttype.as_notnullable.as(MClassType), [recv])
+		var frame = new StaticFrame(v, self.mpropdef.as(not null), recv.mcasttype.undecorate.as(MClassType), [recv])
 		v.frame = frame
 
 		var value
-		var mtype = self.mpropdef.static_mtype
+		var mtype = self.mtype
 		assert mtype != null
 
 		var nexpr = self.n_expr
@@ -2513,6 +2645,13 @@ redef class ASelfExpr
 	redef fun expr(v) do return v.frame.arguments.first
 end
 
+redef class AImplicitSelfExpr
+	redef fun expr(v) do
+		if not is_sys then return super
+		return v.new_expr("glob_sys", mtype.as(not null))
+	end
+end
+
 redef class AEscapeExpr
 	redef fun stmt(v) do v.add("goto BREAK_{v.escapemark_name(self.escapemark)};")
 end
@@ -2744,6 +2883,10 @@ redef class AIntExpr
 	redef fun expr(v) do return v.int_instance(self.value.as(not null))
 end
 
+redef class AByteExpr
+	redef fun expr(v) do return v.byte_instance(self.value.as(not null))
+end
+
 redef class AFloatExpr
 	redef fun expr(v) do return v.float_instance("{self.n_float.text}") # FIXME use value, not n_float
 end
@@ -2939,7 +3082,7 @@ redef class ASendExpr
 	do
 		var recv = v.expr(self.n_expr, null)
 		var callsite = self.callsite.as(not null)
-		var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
+		var args = v.varargize(callsite.mpropdef, callsite.signaturemap, recv, self.raw_arguments)
 		return v.compile_callsite(callsite, args)
 	end
 end
@@ -2949,7 +3092,7 @@ redef class ASendReassignFormExpr
 	do
 		var recv = v.expr(self.n_expr, null)
 		var callsite = self.callsite.as(not null)
-		var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
+		var args = v.varargize(callsite.mpropdef, callsite.signaturemap, recv, self.raw_arguments)
 
 		var value = v.expr(self.n_value, null)
 
@@ -2971,26 +3114,33 @@ redef class ASuperExpr
 
 		var callsite = self.callsite
 		if callsite != null then
-			var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
+			var args
 
-			# Add additional arguments for the super init call
-			if args.length == 1 then
+			if self.n_args.n_exprs.is_empty then
+				# Add automatic arguments for the super init call
+				args = [recv]
 				for i in [0..callsite.msignature.arity[ do
 					args.add(v.frame.arguments[i+1])
 				end
+			else
+				args = v.varargize(callsite.mpropdef, callsite.signaturemap, recv, self.n_args.n_exprs)
 			end
+
 			# Super init call
 			var res = v.compile_callsite(callsite, args)
 			return res
 		end
 
 		var mpropdef = self.mpropdef.as(not null)
-		var args = v.varargize(mpropdef, recv, self.n_args.n_exprs)
-		if args.length == 1 then
+
+		var args
+		if self.n_args.n_exprs.is_empty then
 			args = v.frame.arguments
+		else
+			args = v.varargize(mpropdef, signaturemap, recv, self.n_args.n_exprs)
 		end
 
-		# stantard call-next-method
+		# Standard call-next-method
 		return v.supercall(mpropdef, recv.mtype.as(MClassType), args)
 	end
 end
@@ -3011,8 +3161,10 @@ redef class ANewExpr
 
 		var recv = v.init_instance_or_extern(mtype)
 
-		var callsite = self.callsite.as(not null)
-		var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
+		var callsite = self.callsite
+		if callsite == null then return recv
+
+		var args = v.varargize(callsite.mpropdef, callsite.signaturemap, recv, self.n_args.n_exprs)
 		var res2 = v.compile_callsite(callsite, args)
 		if res2 != null then
 			#self.debug("got {res2} from {mproperty}. drop {recv}")
@@ -3064,6 +3216,20 @@ redef class AIssetAttrExpr
 	end
 end
 
+redef class AVarargExpr
+	redef fun expr(v)
+	do
+		return v.expr(self.n_expr, null)
+	end
+end
+
+redef class ANamedargExpr
+	redef fun expr(v)
+	do
+		return v.expr(self.n_expr, null)
+	end
+end
+
 redef class ADebugTypeExpr
 	redef fun stmt(v)
 	do
@@ -3129,7 +3295,7 @@ var modelbuilder = new ModelBuilder(model, toolcontext)
 
 var arguments = toolcontext.option_context.rest
 if arguments.length > 1 and toolcontext.opt_output.value != null then
-	print "Error: --output needs a single source file. Do you prefer --dir?"
+	print "Option Error: --output needs a single source file. Do you prefer --dir?"
 	exit 1
 end