From 11c0bfff89d6a3ff20129db056b6ad656004f897 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 21 Apr 2021 10:18:07 -0400
Subject: VS: Generalize CSharp /langversion flag mapping

Map the `/langversion:` flag followed by any value to a `LangVersion`
element with the specified value in the `.csproj` file.

Fixes: #22089
---
 Templates/MSBuild/FlagTables/v10_CSharp.json  | 51 ++++-----------------------
 Templates/MSBuild/FlagTables/v11_CSharp.json  | 51 ++++-----------------------
 Templates/MSBuild/FlagTables/v12_CSharp.json  | 51 ++++-----------------------
 Templates/MSBuild/FlagTables/v140_CSharp.json | 51 ++++-----------------------
 Templates/MSBuild/FlagTables/v141_CSharp.json | 51 ++++-----------------------
 Templates/MSBuild/FlagTables/v142_CSharp.json | 51 ++++-----------------------
 6 files changed, 36 insertions(+), 270 deletions(-)

diff --git a/Templates/MSBuild/FlagTables/v10_CSharp.json b/Templates/MSBuild/FlagTables/v10_CSharp.json
index 5989aea..9f21d9a 100644
--- a/Templates/MSBuild/FlagTables/v10_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v10_CSharp.json
@@ -363,52 +363,13 @@
   },
   {
     "name":  "LangVersion",
-    "switch": "langversion:ISO-1",
+    "switch": "langversion:",
     "comment": "",
-    "value": "ISO-1",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:ISO-2",
-    "comment": "",
-    "value": "ISO-2",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:3",
-    "comment": "",
-    "value": "3",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:4",
-    "comment": "",
-    "value": "4",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:5",
-    "comment": "",
-    "value": "5",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:6",
-    "comment": "",
-    "value": "6",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:default",
-    "comment": "",
-    "value": "default",
-    "flags": []
+    "value": "",
+    "flags": [
+      "UserValue",
+      "UserRequired"
+    ]
   },
   {
     "name":  "DelaySign",
diff --git a/Templates/MSBuild/FlagTables/v11_CSharp.json b/Templates/MSBuild/FlagTables/v11_CSharp.json
index 5989aea..9f21d9a 100644
--- a/Templates/MSBuild/FlagTables/v11_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v11_CSharp.json
@@ -363,52 +363,13 @@
   },
   {
     "name":  "LangVersion",
-    "switch": "langversion:ISO-1",
+    "switch": "langversion:",
     "comment": "",
-    "value": "ISO-1",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:ISO-2",
-    "comment": "",
-    "value": "ISO-2",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:3",
-    "comment": "",
-    "value": "3",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:4",
-    "comment": "",
-    "value": "4",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:5",
-    "comment": "",
-    "value": "5",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:6",
-    "comment": "",
-    "value": "6",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:default",
-    "comment": "",
-    "value": "default",
-    "flags": []
+    "value": "",
+    "flags": [
+      "UserValue",
+      "UserRequired"
+    ]
   },
   {
     "name":  "DelaySign",
diff --git a/Templates/MSBuild/FlagTables/v12_CSharp.json b/Templates/MSBuild/FlagTables/v12_CSharp.json
index 5989aea..9f21d9a 100644
--- a/Templates/MSBuild/FlagTables/v12_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v12_CSharp.json
@@ -363,52 +363,13 @@
   },
   {
     "name":  "LangVersion",
-    "switch": "langversion:ISO-1",
+    "switch": "langversion:",
     "comment": "",
-    "value": "ISO-1",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:ISO-2",
-    "comment": "",
-    "value": "ISO-2",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:3",
-    "comment": "",
-    "value": "3",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:4",
-    "comment": "",
-    "value": "4",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:5",
-    "comment": "",
-    "value": "5",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:6",
-    "comment": "",
-    "value": "6",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:default",
-    "comment": "",
-    "value": "default",
-    "flags": []
+    "value": "",
+    "flags": [
+      "UserValue",
+      "UserRequired"
+    ]
   },
   {
     "name":  "DelaySign",
diff --git a/Templates/MSBuild/FlagTables/v140_CSharp.json b/Templates/MSBuild/FlagTables/v140_CSharp.json
index 5989aea..9f21d9a 100644
--- a/Templates/MSBuild/FlagTables/v140_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v140_CSharp.json
@@ -363,52 +363,13 @@
   },
   {
     "name":  "LangVersion",
-    "switch": "langversion:ISO-1",
+    "switch": "langversion:",
     "comment": "",
-    "value": "ISO-1",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:ISO-2",
-    "comment": "",
-    "value": "ISO-2",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:3",
-    "comment": "",
-    "value": "3",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:4",
-    "comment": "",
-    "value": "4",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:5",
-    "comment": "",
-    "value": "5",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:6",
-    "comment": "",
-    "value": "6",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:default",
-    "comment": "",
-    "value": "default",
-    "flags": []
+    "value": "",
+    "flags": [
+      "UserValue",
+      "UserRequired"
+    ]
   },
   {
     "name":  "DelaySign",
diff --git a/Templates/MSBuild/FlagTables/v141_CSharp.json b/Templates/MSBuild/FlagTables/v141_CSharp.json
index 5989aea..9f21d9a 100644
--- a/Templates/MSBuild/FlagTables/v141_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v141_CSharp.json
@@ -363,52 +363,13 @@
   },
   {
     "name":  "LangVersion",
-    "switch": "langversion:ISO-1",
+    "switch": "langversion:",
     "comment": "",
-    "value": "ISO-1",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:ISO-2",
-    "comment": "",
-    "value": "ISO-2",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:3",
-    "comment": "",
-    "value": "3",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:4",
-    "comment": "",
-    "value": "4",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:5",
-    "comment": "",
-    "value": "5",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:6",
-    "comment": "",
-    "value": "6",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:default",
-    "comment": "",
-    "value": "default",
-    "flags": []
+    "value": "",
+    "flags": [
+      "UserValue",
+      "UserRequired"
+    ]
   },
   {
     "name":  "DelaySign",
diff --git a/Templates/MSBuild/FlagTables/v142_CSharp.json b/Templates/MSBuild/FlagTables/v142_CSharp.json
index 4dcea9d..ae1bd47 100644
--- a/Templates/MSBuild/FlagTables/v142_CSharp.json
+++ b/Templates/MSBuild/FlagTables/v142_CSharp.json
@@ -381,52 +381,13 @@
   },
   {
     "name":  "LangVersion",
-    "switch": "langversion:ISO-1",
+    "switch": "langversion:",
     "comment": "",
-    "value": "ISO-1",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:ISO-2",
-    "comment": "",
-    "value": "ISO-2",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:3",
-    "comment": "",
-    "value": "3",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:4",
-    "comment": "",
-    "value": "4",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:5",
-    "comment": "",
-    "value": "5",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:6",
-    "comment": "",
-    "value": "6",
-    "flags": []
-  },
-  {
-    "name":  "LangVersion",
-    "switch": "langversion:default",
-    "comment": "",
-    "value": "default",
-    "flags": []
+    "value": "",
+    "flags": [
+      "UserValue",
+      "UserRequired"
+    ]
   },
   {
     "name":  "DelaySign",
-- 
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