Add settings for cached pre-compiled headers

Extension/package.json

@@ -308,6 +308,19 @@
           "description": "Determines whether pop up notifications will be shown when a configuration provider extension is unable to provide a configuration for a source file.",
           "scope": "resource"
         },
+        "C_Cpp.intelliSense.cachePath": {
+          "type": "string",
+          "default": "${workspaceFolder}/.vscode/ipch",
+          "description": "Defines the folder path for cached precompiled headers. The default path is \"${workspaceFolder}/.vscode/ipch\" folder",
+          "scope": "resource"
+        },
+        "C_Cpp.intelliSense.cacheSize": {
+          "type": "number",
+          "default": 5120,
+          "description": "Maximum size of the per-workspace hard drive space in megabytes for cached precompiled headers; the actual usage may fluctuate around this value. The default size is 5120 MB. Precompiled header caching is disabled when the size is 0.",
+          "scope": "resource",
+          "minimum": 0
+        },
         "C_Cpp.default.includePath": {
           "type": [
             "array",

Extension/src/LanguageServer/client.ts

@@ -398,6 +398,8 @@ class DefaultClient implements Client {
                 tab_size: other.editorTabSize,
                 intelliSenseEngine: settings.intelliSenseEngine,
                 intelliSenseEngineFallback: settings.intelliSenseEngineFallback,
+                cachePath: settings.cachePath,
+                cacheSize: settings.cacheSize,
                 autocomplete: settings.autoComplete,
                 errorSquiggles: settings.errorSquiggles,
                 dimInactiveRegions: settings.dimInactiveRegions,

Extension/src/LanguageServer/settings.ts

@@ -39,6 +39,8 @@ export class CppSettings extends Settings {
     public get suggestSnippets(): boolean { return super.Section.get<boolean>("suggestSnippets"); }
     public get intelliSenseEngine(): string { return super.Section.get<string>("intelliSenseEngine"); }
     public get intelliSenseEngineFallback(): string { return super.Section.get<string>("intelliSenseEngineFallback"); }
+    public get cachePath(): string { return super.Section.get<string>("intelliSense.cachePath"); }
+    public get cacheSize(): number { return super.Section.get<number>("intelliSense.cacheSize"); }
     public get errorSquiggles(): string { return super.Section.get<string>("errorSquiggles"); }
     public get dimInactiveRegions(): boolean { return super.Section.get<boolean>("dimInactiveRegions"); }
     public get inactiveRegionOpacity(): number { return super.Section.get<number>("inactiveRegionOpacity"); }