Add rescript support (#79)

Author: amiralies

after/syntax/rescript/graphql.vim

@@ -0,0 +1,38 @@
+" Copyright (c) 2016-2021 Jon Parise <jon@indelible.org>
+"
+" Permission is hereby granted, free of charge, to any person obtaining a copy
+" of this software and associated documentation files (the "Software"), to
+" deal in the Software without restriction, including without limitation the
+" rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+" sell copies of the Software, and to permit persons to whom the Software is
+" furnished to do so, subject to the following conditions:
+"
+" The above copyright notice and this permission notice shall be included in
+" all copies or substantial portions of the Software.
+"
+" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+" AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+" FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+" IN THE SOFTWARE.
+"
+" Language: GraphQL
+" Maintainer: Jon Parise <jon@indelible.org>
+
+if exists('b:current_syntax')
+  let s:current_syntax = b:current_syntax
+  unlet b:current_syntax
+endif
+
+let b:graphql_nested_syntax = 1
+syn include @GraphQLSyntax syntax/graphql.vim
+unlet b:graphql_nested_syntax
+
+if exists('s:current_syntax')
+  let b:current_syntax = s:current_syntax
+endif
+
+syntax region graphqlExtensionPoint start=+%graphql(+ end=+)+ contains=graphqlExtensionPointS
+syntax region graphqlExtensionPointS matchgroup=String start=+`+ end=+`+ contains=@GraphQLSyntax contained

test/rescript/default.vader

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+Before:
+  source ../after/syntax/rescript/graphql.vim
+
+Given rescript (Template):
+  %graphql(`
+    query UserQuery {
+      user {
+        id
+        name
+      }
+    }
+  `)
+
+Execute (Syntax assertions):
+  AssertEqual 'graphqlExtensionPoint', SyntaxOf('%graphql')
+  AssertEqual 'graphqlName', SyntaxOf('user')