Started to fix some runtime bugs.

.vscode/c_cpp_properties.json

@@ -13,7 +13,7 @@
             ],
             "windowsSdkVersion": "10.0.19041.0",
             "compilerPath": "C:/Users/Ed/scoop/apps/llvm/current/bin/clang++.exe",
-            "intelliSenseMode": "windows-clang-x64"
+            "intelliSenseMode": "windows-clang-x64",
         }
     ],
     "version": 4

.vscode/gencpp.natvis

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
+
+	<Type Name="String">
+		<DisplayString Condition="Data == nullptr">null</DisplayString>
+		<DisplayString>{Data,na}</DisplayString>
+		<Expand>
+			<!-- Define a synthetic child element for the Header -->
+			<Synthetic Name="Header">
+				<!-- Construct a Header object from the Data pointer -->
+				<DisplayString>{(Header*)((char*)Data - sizeof(Header))}</DisplayString>
+				<!-- Define the children of the synthetic element -->
+				<Expand>
+					<Item Name="Allocator">((Header*)((char*)Data - sizeof(Header)))->Allocator</Item>
+					<Item Name="Length">((Header*)((char*)Data - sizeof(Header)))->Length</Item>
+					<Item Name="Capacity">((Header*)((char*)Data - sizeof(Header)))->Capacity</Item>
+				</Expand>
+			</Synthetic>
+		</Expand>
+	</Type>
+
+	<Type Name="String::Header">
+		<DisplayString>Length: {Length}, Capacity: {Capacity}</DisplayString>
+		<Expand>
+			<Item Name="Allocator">Allocator</Item>
+			<Item Name="Length">Length</Item>
+			<Item Name="Capacity">Capacity</Item>
+		</Expand>
+	</Type>
+
+</AutoVisualizer>

.vscode/gencpp_lldbvis.py

@@ -0,0 +1,84 @@
+import lldb
+
+class String_SyntheticChildrenProvider:
+    def __init__(self, valobj, internal_dict):
+        self.valobj = valobj
+
+    def num_children(self):
+        return 3
+
+    def get_child_index(self, name):
+        if name == "Data":
+            return 0
+        if name == "Length":
+            return 1
+        if name == "Capacity":
+            return 2
+
+        return None
+
+    def get_child_at_index(self, index):
+        if index == 0:
+            return self.valobj.GetChildMemberWithName("Data")
+
+        data = self.valobj.GetChildMemberWithName("Data")
+        header_ptr = data.GetValueAsUnsigned() - 16
+        target = self.valobj.GetTarget()
+        header_type = target.FindFirstType("gen::String::Header")
+        header = self.valobj.CreateValueFromAddress("Header", header_ptr, header_type)
+
+        if index == 1:
+            return header.GetChildMemberWithName("Length")
+
+        if index == 2:
+            return header.GetChildMemberWithName("Capacity")
+
+        return None
+
+    def update(self):
+        pass
+
+def list_synthetic_providers(debugger):
+    print("Listing synthetic providers (start)")
+
+    num_categories = debugger.GetNumCategories()
+    print("Debugger language categories count:", num_categories)
+
+    cpp_category = None
+    for i in range(num_categories):
+        print("WERE HERE")
+        print(debugger)
+        cat = debugger.GetCategoryAtIndex(i)
+        print("Category name: {}, language: {}".format(cat.GetName(), cat.GetLanguage()))
+        if cat.GetLanguage() == lldb.eLanguageTypeC_plus_plus:
+            cpp_category = cat
+            break
+
+    if not cpp_category:
+        print("Could not get C++ category")
+        return
+
+    synthetic_providers = cpp_category.GetSyntheticChildren()
+    if not synthetic_providers:
+        print("Could not get synthetic children")
+        return
+
+    num_providers = synthetic_providers.GetSize()
+    print("Number of synthetic providers:", num_providers)
+
+    for i in range(num_providers):
+        provider = synthetic_providers.GetSyntheticChildAtIndex(i)
+        print("Provider regex: {}, class name: {}".format(provider.GetRegex(), provider.GetDescription()))
+
+    print("Listing synthetic providers (finish)")
+
+
+
+
+def __lldb_init_module(debugger, internal_dict):
+    print("Importing the String visualization")
+    debugger.HandleCommand("type synthetic add -x '^gen::String$' -l gencpp_libvis.String_SyntheticChildrenProvider")
+    print("Before list_synthetic_providers")
+    list_synthetic_providers(debugger)
+
+lldb.debugger = None

.vscode/launch.json

@@ -0,0 +1,28 @@
+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"type": "lldb",
+			"request": "launch",
+			"name": "Debug gentime lldb",
+			"program": "${workspaceFolder}/test/gen/build/gencpp.exe",
+			"args": [],
+			"cwd": "${workspaceFolder}",
+			"postRunCommands": [
+				"command script import \"${workspaceFolder}/.vscode/gencpp_lldbvis.py\""
+			]
+		},
+		{
+			"type": "cppvsdbg",
+			"request": "launch",
+			"name": "Debug gentime vsdbg",
+			"program": "${workspaceFolder}/test/gen/build/gencpp.exe",
+			"args": [],
+			"cwd": "${workspaceFolder}",
+			"visualizerFile": "${workspaceFolder}/.vscode/gencpp.natvis"
+		}
+	]
+}

.vscode/settings.json

@@ -18,5 +18,6 @@
 		"algorithm": "cpp",
 		"limits": "cpp"
 	},
-	"C_Cpp.intelliSenseEngineFallback": "disabled"
+	"C_Cpp.intelliSenseEngineFallback": "disabled",
+	"mesonbuild.configureOnOpen": true
 }