Implemented an abstract syntax tree

src/build/ast/AST.go

@@ -0,0 +1,36 @@
+package ast
+
+import (
+	"git.akyoto.dev/cli/q/src/build/expression"
+	"git.akyoto.dev/cli/q/src/build/token"
+)
+
+type Node interface{}
+type AST []Node
+
+type Assign struct {
+	Value *expression.Expression
+	Name  token.Token
+}
+
+type Call struct {
+	Expression *expression.Expression
+}
+
+type Define struct {
+	Value *expression.Expression
+	Name  token.Token
+}
+
+type If struct {
+	Condition *expression.Expression
+	Body      AST
+}
+
+type Loop struct {
+	Body AST
+}
+
+type Return struct {
+	Value *expression.Expression
+}