fix: scope regex literals in package code

prototypes/sema.tmLanguage.json

@@ -9,6 +9,9 @@
     {
       "include": "#comment"
     },
+    {
+      "include": "#regex"
+    },
     {
       "include": "#string"
     },
@@ -50,6 +53,17 @@
     }
   ],
   "repository": {
+    "regex": {
+      "name": "string.regexp.sema",
+      "begin": "#\"",
+      "end": "\"",
+      "patterns": [
+        {
+          "name": "string.regexp.sema",
+          "match": "\\\\."
+        }
+      ]
+    },
     "block-comment": {
       "name": "comment.block.sema",
       "begin": "#\\|",

static/sema.tmLanguage.json

@@ -9,6 +9,9 @@
     {
       "include": "#comment"
     },
+    {
+      "include": "#regex"
+    },
     {
       "include": "#string"
     },
@@ -50,6 +53,17 @@
     }
   ],
   "repository": {
+    "regex": {
+      "name": "string.regexp.sema",
+      "begin": "#\"",
+      "end": "\"",
+      "patterns": [
+        {
+          "name": "string.regexp.sema",
+          "match": "\\\\."
+        }
+      ]
+    },
     "block-comment": {
       "name": "comment.block.sema",
       "begin": "#\\|",

syntaxes/Sema.sublime-syntax

@@ -17,6 +17,7 @@ contexts:
   main:
     - include: block-comment
     - include: line-comment
+    - include: regex
     - include: string
     - include: quoted-expression
     - include: definition
@@ -58,6 +59,17 @@ contexts:
   # ---------------------------------------------------------------------
   # STRINGS
   # ---------------------------------------------------------------------
+  regex:
+    - match: '#"'
+      scope: punctuation.definition.string.begin.sema string.regexp.sema
+      push:
+        - meta_scope: string.regexp.sema
+        - match: '\\.'
+          scope: string.regexp.sema
+        - match: '"'
+          scope: punctuation.definition.string.end.sema string.regexp.sema
+          pop: true
+
   string:
     - match: '"'
       scope: punctuation.definition.string.begin.sema

tests/grammar_assets_test.rs

@@ -0,0 +1,30 @@
+use serde_json::Value;
+
+#[test]
+fn textmate_assets_define_the_canonical_regex_scope() {
+    let prototype: Value = serde_json::from_str(include_str!("../prototypes/sema.tmLanguage.json"))
+        .expect("prototype grammar must be valid JSON");
+    let static_grammar: Value =
+        serde_json::from_str(include_str!("../static/sema.tmLanguage.json"))
+            .expect("static grammar must be valid JSON");
+
+    assert_eq!(prototype, static_grammar);
+    assert_eq!(
+        prototype["repository"]["regex"]["name"],
+        "string.regexp.sema"
+    );
+    assert_eq!(prototype["repository"]["regex"]["begin"], "#\"");
+    assert_eq!(prototype["repository"]["regex"]["end"], "\"");
+}
+
+#[test]
+fn syntect_asset_defines_the_regex_context_before_strings() {
+    let syntax = include_str!("../syntaxes/Sema.sublime-syntax");
+    let regex = syntax.find("    - include: regex").expect("regex include");
+    let string = syntax
+        .find("    - include: string")
+        .expect("string include");
+
+    assert!(regex < string);
+    assert!(syntax.contains("meta_scope: string.regexp.sema"));
+}