From a143796b72e046044506d62fd9f03282443a89dc Mon Sep 17 00:00:00 2001
From: Thomas Smith <thom@thomthesmith.com>
Date: Tue, 20 Aug 2019 10:59:31 -0400
Subject: [PATCH 1/2] Add lookahead templates.

---
 .../custom_templates/custom_templates.syntax-extension   | 9 +++++++++
 .../templates/syntax_test_templates.js                   | 6 ++++++
 tests/test_syntaxes.py                                   | 3 +++
 3 files changed, 18 insertions(+)

diff --git a/extensions/custom_templates/custom_templates.syntax-extension b/extensions/custom_templates/custom_templates.syntax-extension
index f1bd444..c05b0ab 100644
--- a/extensions/custom_templates/custom_templates.syntax-extension
+++ b/extensions/custom_templates/custom_templates.syntax-extension
@@ -13,6 +13,7 @@ contexts: !merge
     - match: (?=`)
       set:
         - include: literal-string-template-custom-comments
+        - include: literal-string-template-custom-lookahead
         - include: literal-string-template
 
   literal-string-template-custom-tags: !foreach
@@ -31,6 +32,14 @@ contexts: !merge
       scope: variable.function.tagged-template.js
       set: !include_resource Packages/JSCustom/extensions/custom_templates/template.yaml
 
+  literal-string-template-custom-lookahead: !foreach
+    in: !argument [lookaheads, {}]
+    as: [lookahead, include]
+    value:
+      match: !format '(?=`(?:{lookahead}))'
+      scope: variable.function.tagged-template.js
+      set: !include_resource Packages/JSCustom/extensions/custom_templates/template.yaml
+
   styled-components: !if
     - !argument styled_components
     - - match: (?=(?:styled|css|createGlobalStyle|injectGlobal|keyframes){{identifier_break}})
diff --git a/tests/syntax_test_suites/templates/syntax_test_templates.js b/tests/syntax_test_suites/templates/syntax_test_templates.js
index 18c517a..4f56f32 100644
--- a/tests/syntax_test_suites/templates/syntax_test_templates.js
+++ b/tests/syntax_test_suites/templates/syntax_test_templates.js
@@ -17,6 +17,12 @@
 //       ^ punctuation.definition.string.begin
 //            ^ punctuation.definition.string.end
 
+    `select * from dual`;
+//  ^^^^^^^^^^^^^^^^^^^^ meta.string
+//  ^ string.quoted.other punctuation.definition.string.begin
+//   ^^^^^^^^^^^^^^^^^^ source.sql - string
+//                     ^ string.quoted.other punctuation.definition.string.end
+
     styled`color: red`
 //  ^^^^^^ variable.function.tagged-template
 //        ^ string.quoted.other punctuation.definition.string.begin
diff --git a/tests/test_syntaxes.py b/tests/test_syntaxes.py
index 8bbd6f0..7b84a4f 100644
--- a/tests/test_syntaxes.py
+++ b/tests/test_syntaxes.py
@@ -102,6 +102,9 @@ def test_templates(self):
                     'comments': {
                         'css': 'scope:source.css',
                     },
+                    'lookaheads': {
+                        r'select\b': 'scope:source.sql',
+                    },
                     'styled_components': True,
                 }
             },

From f24910cd1752d45b0edf3c719125dab8fdc7bb59 Mon Sep 17 00:00:00 2001
From: Thomas Smith <thom@thomthesmith.com>
Date: Tue, 20 Aug 2019 11:03:02 -0400
Subject: [PATCH 2/2] Add docs.

---
 README.md | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 119f38e..391f18c 100644
--- a/README.md
+++ b/README.md
@@ -138,7 +138,7 @@ const myStyle = style`div { color: red }`;
 
 ##### `comments`: object
 
-Highlight tagged template literals based on a preceding block comment. Example configuration:
+Highlight untagged template literals based on a preceding block comment. Example configuration:
 
 ```json
 {
@@ -161,6 +161,30 @@ const myStyle = /*style*/`div { color: red }`;
 const myStyle = /* style */`div { color: red }`;
 ```
 
+##### `lookaheads`: object
+
+Highlight untagged template literals based on the contents. Example configuration:
+
+```json
+{
+    "configurations": {
+        "My Config": {
+            "custom_templates": {
+                "lookaheads": {
+                    "select\b": "scope:source.sql"
+                }
+            }
+        }
+    }
+}
+```
+
+Example JavaScript:
+
+```js
+const myQuery = `select 1 from dual`;
+```
+
 ##### `styled_components`: boolean
 
 Highlight template string literals for [Styled Components](https://www.styled-components.com/).