From 1cd7511ced868f12d843ecae2516af37f1f54049 Mon Sep 17 00:00:00 2001
From: Sasha Koshka <sashakoshka@tebibyte.media>
Date: Tue, 11 Oct 2022 11:23:50 -0400
Subject: [PATCH] Add dereference to tree

---
 parser/tree-tostring.go | 13 +++++++++++++
 parser/tree.go          | 13 ++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/parser/tree-tostring.go b/parser/tree-tostring.go
index 157e3ca..2db8f60 100644
--- a/parser/tree-tostring.go
+++ b/parser/tree-tostring.go
@@ -133,6 +133,9 @@ func (argument Argument) ToString (indent int, breakLine bool) (output string) {
 	
 	case ArgumentKindList:
 		output += argument.value.(List).ToString(indent, breakLine)
+
+	case ArgumentKindDereference:
+		output += argument.value.(Dereference).ToString(indent)
 	
 	case ArgumentKindIdentifier:
 		output += doIndent (
@@ -276,6 +279,16 @@ func (behavior FaceBehavior) ToString (indent int) (output string) {
 	return
 }
 
+func (dereference Dereference) ToString (indent int) (output string) {
+	output += "{"
+	output += dereference.argument.ToString(indent, false)
+	if dereference.offset != 0 {
+		output += fmt.Sprint(" ", dereference.offset)
+	}
+	output += "}"
+	return
+}
+
 func (phrase Phrase) ToString (indent int, ownLine bool) (output string) {
 	if ownLine {
 		output += doIndent(indent)
diff --git a/parser/tree.go b/parser/tree.go
index 0b3f09f..92bfb34 100644
--- a/parser/tree.go
+++ b/parser/tree.go
@@ -97,10 +97,8 @@ const (
 	ArgumentKindList
 
 	// {name}
-	ArgumentKindDereference
-	
 	// {name 23}
-	ArgumentKindSubscript
+	ArgumentKindDereference
 
 	// name.name
 	// name.name.name
@@ -220,6 +218,15 @@ type FaceSection struct {
 	FaceBehavior
 }
 
+// Dereference represents a pointer dereference or array subscript.
+type Dereference struct {
+	locatable
+	valuable
+
+	// if a simple dereference was parsed, this should just be zero.
+	offset int
+}
+
 // PhraseKind determines what semantic role a phrase plays.
 type PhraseKind int