From cb598cb16a8e29df49acfaaf6a7610dcad436ee3 Mon Sep 17 00:00:00 2001
From: Bronley Plumb <bronley@gmail.com>
Date: Mon, 13 May 2024 12:51:08 -0400
Subject: [PATCH] Adds syntax highlighting for `alias` statements (#567)

---
 src/grammar/brightscript.tmLanguage.spec.ts | 26 +++++++++++++++++++++
 syntaxes/brightscript.tmLanguage.json       | 17 ++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/src/grammar/brightscript.tmLanguage.spec.ts b/src/grammar/brightscript.tmLanguage.spec.ts
index d464a65b..df7d9327 100644
--- a/src/grammar/brightscript.tmLanguage.spec.ts
+++ b/src/grammar/brightscript.tmLanguage.spec.ts
@@ -6,6 +6,32 @@ import { standardizePath as s } from 'brighterscript';
 const brightscriptTmlanguagePath = s`${__dirname}/../../syntaxes/brightscript.tmLanguage.json`;
 
 describe('brightscript.tmlanguage.json', () => {
+    it('colors alias statement properly', async () => {
+        await testGrammar(`
+             alias alpha = beta
+                          '^^^^ entity.name.variable.local.brs
+                        '^ keyword.operator.assignment.brs
+                  '^^^^^ entity.name.variable.brs
+            '^^^^^ keyword.declaration.alias.brs
+        `);
+
+        await testGrammar(`
+            alias alpha=beta
+                       '^^^^ entity.name.variable.local.brs
+                      '^ keyword.operator.assignment.brs
+                 '^^^^^ entity.name.variable.brs
+           '^^^^^ keyword.declaration.alias.brs
+        `);
+
+        await testGrammar(`
+           alias alpha = beta.charlie.delta
+                        '^^^^ entity.name.variable.local.brs
+                      '^ keyword.operator.assignment.brs
+                '^^^^^ entity.name.variable.brs
+          '^^^^^ keyword.declaration.alias.brs
+        `);
+    });
+
     it('colors normal conditional compile statements properly', async () => {
         await testGrammar(`
              #if true
diff --git a/syntaxes/brightscript.tmLanguage.json b/syntaxes/brightscript.tmLanguage.json
index 70d26000..cb841980 100644
--- a/syntaxes/brightscript.tmLanguage.json
+++ b/syntaxes/brightscript.tmLanguage.json
@@ -37,6 +37,9 @@
                 {
                     "include": "#import_statement"
                 },
+                {
+                    "include": "#alias_statement"
+                },
                 {
                     "include": "#namespace_declaration"
                 },
@@ -393,6 +396,20 @@
                 }
             }
         },
+        "alias_statement": {
+            "match": "(?i:(alias)\\s+([a-z0-9_]+)\\s*(=)\\s*)",
+            "captures": {
+                "1": {
+                    "name": "keyword.declaration.alias.brs"
+                },
+                "2": {
+                    "name": "entity.name.variable.brs"
+                },
+                "3": {
+                    "name": "keyword.operator.assignment.brs"
+                }
+            }
+        },
         "namespace_declaration": {
             "begin": "(?i:(namespace))\\s+",
             "beginCaptures": {