Fix parsing wrong superscripts like 10^10 (#132)

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Add missing citation commands: `\citeA`, `\citeR`, `\citeS`, `\citeyearR` ([#94](https://github.com/latex-lsp/tree-sitter-latex/issues/94))
 - Let `\declaretheorem` accept multiple environment names ([texlab/#1075](https://github.com/latex-lsp/texlab/issues/1075))
+- Fix parsing wrong superscripts like `10^10` ([#107](https://github.com/latex-lsp/tree-sitter-latex/issues/107))
 
 ## [0.4.0] - 2024-04-01
 

grammar.js

@@ -393,16 +393,18 @@ module.exports = grammar({
 
     operator: $ => choice('+', '-', '*', '/', '<', '>', '!', '|', ':', "'"),
 
+    letter: $ => /[^\\%\{\}\$\#_\^]/,
+
     subscript: $ =>
       seq(
         '_',
-        field('subscript', choice($.curly_group, $.word, $.generic_command)),
+        field('subscript', choice($.curly_group, $.letter, $.command_name)),
       ),
 
     superscript: $ =>
       seq(
         '^',
-        field('superscript', choice($.curly_group, $.word, $.generic_command)),
+        field('superscript', choice($.curly_group, $.letter, $.command_name)),
       ),
 
     //--- Key / Value

test/corpus/issues.txt

@@ -481,11 +481,11 @@ Let
     (text
       (word)
       (superscript
-        (word))
+        (letter))
       (operator)
       (word)
       (superscript
-        (word)))
+        (letter)))
     (text_mode
       (curly_group
         (text
@@ -497,11 +497,12 @@ Let
     (text
       (word)
       (superscript
-        (word))
+        (letter))
       (operator)
       (word)
       (superscript
-        (word)))
+        (letter))
+      (word))
     (end
       (curly_group_text
         (text
@@ -756,6 +757,21 @@ r \big|_0^a
       (command_name))
     (operator)
     (subscript
-      (word))
+      (letter))
     (superscript
-      (word))))
+      (letter))))
+
+================================================================================
+tree-sitter-latex (Issue #107) | subscript
+================================================================================
+
+10^10
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (text
+    (word)
+    (superscript
+      (letter))
+    (word)))

test/corpus/math.txt

@@ -220,6 +220,6 @@ Foo_{bar}^2
     (subscript
       (curly_group
         (text
-        (word))))
+          (word))))
     (superscript
-      (word))))
+      (letter))))