Added FunctionNode (no tests, no parser)

parse/block.go

@@ -0,0 +1,25 @@
+package parse
+
+import (
+	"usm/source"
+)
+
+// TODO: add label support
+
+type BlockNode struct {
+	source.UnmanagedSourceView
+	Instructions []InstructionNode
+}
+
+func (n BlockNode) View() source.UnmanagedSourceView {
+	return n.UnmanagedSourceView
+}
+
+func (n BlockNode) String(ctx source.SourceContext) (s string) {
+	s = "{\n"
+	for _, inst := range n.Instructions {
+		s += "\t" + inst.String(ctx) + "\n"
+	}
+	s += "}\n"
+	return s
+}

parse/function.go

@@ -0,0 +1,18 @@
+package parse
+
+import (
+	"usm/source"
+)
+
+type FunctionNode struct {
+	Signature SignatureNode
+	Block     BlockNode
+}
+
+func (n FunctionNode) View() source.UnmanagedSourceView {
+	return n.Signature.View().Merge(n.Block.View())
+}
+
+func (n FunctionNode) String(ctx source.SourceContext) string {
+	return n.Signature.String(ctx) + " " + n.Block.String(ctx)
+}

parse/signature.go

@@ -0,0 +1,29 @@
+package parse
+
+import "usm/source"
+
+type SignatureNode struct {
+	source.UnmanagedSourceView
+	Identifier source.UnmanagedSourceView
+	Arguments  []CalleeArgumentNode
+	Returns    []TypeNode
+}
+
+func (n SignatureNode) View() source.UnmanagedSourceView {
+	return n.UnmanagedSourceView
+}
+
+func (n SignatureNode) String(ctx source.SourceContext) string {
+	s := "def "
+	for _, ret := range n.Returns {
+		s += ret.String(ctx) + " "
+	}
+
+	s += string(n.Identifier.Raw(ctx))
+
+	for _, arg := range n.Arguments {
+		s += " " + arg.String(ctx)
+	}
+
+	return s
+}