Wire up accept() dispatch and add ASTVisualizer to bootstrap

src-bootstrap/ast/abstract-ast-visitor-intf.spice

@@ -0,0 +1,12 @@
+// Std imports
+import "std/type/any";
+
+/**
+ * Dependency-free visitor interface. Declared here (without importing ast-nodes.spice or
+ * ast-node-intf.spice) so that ast-nodes.spice can import this file and declare
+ * accept(IAbstractAstVisitor*) on every node without creating a circular dependency.
+ *
+ * The full IAbstractAstVisitor with typed visit methods lives in abstract-ast-visitor.spice,
+ * which extends this interface.
+ */
+public type IAbstractAstVisitor interface {}

src-bootstrap/ast/abstract-ast-visitor.spice

@@ -2,9 +2,12 @@
 import "std/type/any";
 
 // Own imports
+import "bootstrap/ast/abstract-ast-visitor-intf";
 import "bootstrap/ast/ast-nodes";
+import "bootstrap/ast/ast-node-intf";
 
 public type IAbstractAstVisitor interface {
+    f<Any> visit(IASTNode*);
     f<Any> visitEntry(ASTEntryNode*);
     f<Any> visitMainFctDef(ASTMainFctDefNode*);
     f<Any> visitFctDef(ASTFctDefNode*);

src-bootstrap/ast/ast-node-intf.spice

@@ -1,7 +1,9 @@
 // Std imports
 import "std/data/vector";
+import "std/type/any";
 
 // Own imports
+import "bootstrap/ast/abstract-ast-visitor-intf";
 import "bootstrap/model/function-intf";
 import "bootstrap/model/struct-intf";
 import "bootstrap/model/interface-intf";
@@ -35,11 +37,12 @@ public type CompileTimeValue struct {
     long longValue = 0l
     byte byteValue = cast<byte>(0)
     char charValue = '\0'
-    unsigned long stringValueOffset = 0l // Offset into vector of strings in GlobalResourceManager
+    unsigned long stringValueOffset = 0ul // Offset into vector of strings in GlobalResourceManager
     bool boolValue = false
 }
 
 public type IASTNode interface {
+    public f<Any> accept(IAbstractAstVisitor*);
     public f<Vector<IASTNode*>> getChildren();
     public f<Vector<Vector<const IFunction*>>> getOpFctPointers();
     public p customItemsInitialization(unsigned long /*manifestationCount*/);