[PATCH] D48030: clang-format: [JS] strict prop init annotation.

[Martin Probst via Phabricator via cfe-commits]

mprobst created this revision.
mprobst added a reviewer: krasimir.

TypeScript uses the `!` token for strict property initialization
assertions, as in:

  class X {
    strictPropAsserted!: string;
  }

Previously, clang-format would wrap between the `!` and the `:` for
overly long lines. This patch fixes that by generally preventing the
wrap in that location.


Repository:
  rC Clang

https://reviews.llvm.org/D48030

Files:
  lib/Format/TokenAnnotator.cpp
  unittests/Format/FormatTestJS.cpp


Index: unittests/Format/FormatTestJS.cpp
===================================================================
--- unittests/Format/FormatTestJS.cpp
+++ unittests/Format/FormatTestJS.cpp
@@ -1540,6 +1540,15 @@
                "}");
 }
 
+TEST_F(FormatTestJS, StrictPropInitWrap) {
+  const FormatStyle &Style = getGoogleJSStyleWithColumns(22);
+  verifyFormat("class X {\n"
+               "  strictPropInitField!:\n"
+               "       string;\n"
+               "}",
+               Style);
+}
+
 TEST_F(FormatTestJS, InterfaceDeclarations) {
   verifyFormat("interface I {\n"
                "  x: string;\n"
Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp
+++ lib/Format/TokenAnnotator.cpp
@@ -2981,7 +2981,7 @@
       // We deal with this case later by detecting an entry
       // following a closing paren of this submessage.
     }
-    
+
     // If this is an entry immediately following a submessage, it will be
     // preceded by a closing paren of that submessage, like in:
     //     left---.  .---right
@@ -3027,6 +3027,9 @@
       return false;
     if (Left.is(TT_JsTypeColon))
       return true;
+    // Don't wrap between ":" and "!" of a strict prop init ("field!: type;").
+    if (Left.is(tok::exclaim) && Right.is(tok::colon))
+      return false;
     if (Right.is(Keywords.kw_is))
       return false;
     if (Left.is(Keywords.kw_in))


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