Improved parameter handling

src/core/Function_test.go

@@ -12,9 +12,14 @@ func TestFunction(t *testing.T) {
 	b := build.New("../../examples/hello")
 	env, err := compiler.Compile(b)
 	assert.Nil(t, err)
+
 	main, exists := env.Functions["main.main"]
 	assert.True(t, exists)
 	assert.False(t, main.IsExtern())
 	assert.Equal(t, main.UniqueName, "main.main")
 	assert.Equal(t, main.String(), main.UniqueName)
+
+	write, exists := env.Functions["io.write"]
+	assert.True(t, exists)
+	write.Output[0].Type()
 }

src/core/Parameter.go

@@ -7,22 +7,12 @@ import (
 
 // Parameter is an input or output parameter in a function.
 type Parameter struct {
-	name   string
-	typ    types.Type
-	tokens token.List
+	Name       string
+	TypeTokens token.List
+	typ        types.Type
 }
 
-// NewParameter creates a new parameter with the given list of tokens.
-func NewParameter(tokens token.List) *Parameter {
-	return &Parameter{tokens: tokens}
-}
-
-// Name returns the name of the parameter.
-func (p *Parameter) Name() string {
-	return p.name
-}
-
-// Type returns the type of the parameter.
+// Type returns the data type of the parameter.
 func (p *Parameter) Type() types.Type {
 	return p.typ
 }