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

diff --git a/src/frontend/parallelization_phase.nit b/src/frontend/parallelization_phase.nit
index 2d15d82..b5cc9fd 100644
--- a/src/frontend/parallelization_phase.nit
+++ b/src/frontend/parallelization_phase.nit
@@ -42,22 +42,16 @@ private class ParallelizationPhase
 
 		#TODO: check for self calls
 
-		if nmethdef.n_signature.n_type != null then
-			toolcontext.error(nat.location, "Error: functions not supported yet.")
-			return
-		end
-
 		# Get the module associated with this method
 		var amod = nmethdef.parent.parent
 		assert amod isa AModule
 
 		# Construct the name of the generated class
-		var modulename = amod.n_moduledecl.n_name.n_id.text
-		var classname = "Threaded" + modulename
+		var classname = "Threaded"
 
 		# Try to get the name of the class
 		if nmethdef.parent isa AStdClassdef then
-			classname += nmethdef.parent.as(AStdClassdef).n_id.text
+			classname += nmethdef.parent.as(AStdClassdef).n_qid.n_id.text
 		end
 
 		# Try to get the name of the method
@@ -65,23 +59,38 @@ private class ParallelizationPhase
 			classname += nmethdef.n_methid.as(AIdMethid).n_id.text
 		end
 
+		# Handle methods with a return value
+		var has_rvalue = nmethdef.n_signature.n_type != null
+		var vtype = ""
+		if has_rvalue then
+			vtype = "redef type E: " + nmethdef.n_signature.n_type.n_qid.n_id.text
+		end
 
-		var params = new Array[String]
-		# case if the method has parameters
-		if nmethdef.n_signature.n_params.not_empty then
-			for param in nmethdef.n_signature.n_params do
-				params.add("""
-var {{{param.n_id.text}}} : {{{param.n_type.n_id.text}}}
+		# create a return type
+		var n_id = new TClassid
+		n_id.text = classname
+		var n_qid = new AQclassid
+		n_qid.n_id = n_id
+		var n_type = new AType
+		n_type.n_qid = n_qid
+		nmethdef.n_signature.n_type = n_type
 
-""")
-			end
+		var params = new Array[String]
+		for param in nmethdef.n_signature.n_params do
+			var typ = param.n_type.n_qid.n_id.text
+			if param.n_type.n_kwnullable != null then typ = "nullable {typ}"
+			params.add """
+var {{{param.n_id.text}}}: {{{typ}}}
+"""
 		end
 
 		# String corresponding to the generated class
-		var s="""
+		var classdef_source = """
 class {{{classname}}}
 	super Thread
 
+	{{{vtype}}}
+
 	{{{params.join("\n")}}}
 	redef fun main do
 	end
@@ -89,10 +98,11 @@ end
 """
 
 		# Parse newly obtained classdef
-		var classdef = toolcontext.parse_classdef(s).as(AStdClassdef)
+		var classdef = toolcontext.parse_classdef(classdef_source)
+		assert classdef isa AStdClassdef
 
 		# Get the `main` fun of the class
-		var mainfun : nullable AMethPropdef = null
+		var mainfun: nullable AMethPropdef = null
 		for prop in classdef.n_propdefs do
 			if prop isa AMethPropdef then mainfun = prop
 		end
@@ -102,11 +112,12 @@ end
 		mainfun.n_block = nmethdef.n_block
 
 		# Add "return null" to the end of the `main` function
-		var s_nullreturn = "return null"
-		var nullreturn = toolcontext.parse_something(s_nullreturn)
-		assert nullreturn isa AExpr
-		mainfun.n_block.as(ABlockExpr).n_expr.add(nullreturn)
-
+		if not has_rvalue then
+			var s_nullreturn = "return null"
+			var nullreturn = toolcontext.parse_something(s_nullreturn)
+			assert nullreturn isa AExpr
+			mainfun.n_block.as(ABlockExpr).n_expr.add(nullreturn)
+		end
 
 		# Create new body for the annotated fun
 		var s_newbody : String
@@ -118,18 +129,23 @@ end
 			s_newbody ="""
 var thread = new {{{classname}}}({{{init_params.join(",")}}})
 thread.start
+return thread
 """
 		else
 			s_newbody = """
 var thread = new {{{classname}}}
 thread.start
+return thread
 """
 		end
 
 		var newbody = toolcontext.parse_something(s_newbody)
 		nmethdef.n_block = newbody.as(ABlockExpr)
 
+		nmethdef.validate
+
 		# Add the new class to the module
 		amod.n_classdefs.add(classdef)
+		classdef.validate
 	end
 end