From 97efdf064e48e7f3ee224f3bce0baec01b00ea76 Mon Sep 17 00:00:00 2001
From: arne314 <73391160+arne314@users.noreply.github.com>
Date: Tue, 26 Aug 2025 21:14:35 +0200
Subject: [PATCH] feat(snip): `otn` for generic number series

---
 README.md                        | 2 +-
 lua/typstar/engine.lua           | 2 +-
 lua/typstar/snippets/letters.lua | 1 +
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 2c7bc24..903ef98 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ Markup snippets:
 
 Math snippets:
 - [Many shorthands](./lua/typstar/snippets/math.lua) for mathematical expressions
-- Series of numbered letters: `<letter> ot<optional last index> ` &#8594; `<letter>_1, <letter>_2, ... ` (e.g. `a ot ` &#8594; `a_1, a_2, ... `, `a ot4 ` &#8594; `a_1, a_2, a_3, a_4 `, `alpha otk ` &#8594; `alpha_1, alpha_2, ..., alpha_k `)
+- Series of numbered letters: `<letter> ot<optional last index> ` &#8594; `<letter>_1, <letter>_2, ... ` (e.g. `a ot ` &#8594; `a_1, a_2, ... `, `a ot4 ` &#8594; `a_1, a_2, a_3, a_4 `, `alpha otk ` &#8594; `alpha_1, alpha_2, ..., alpha_k `, `oti ` &#8594; `1, 2, ..., i `)
 - Wrapping of any mathematical expression (see [operations](./lua/typstar/snippets/visual.lua), works nested, multiline and in visual mode via the [selection key](#installation)): `<expression><operation>` &#8594; `<operation>(<expression>)` (e.g. `(a^2+b^2)rt` &#8594; `sqrt(a^2+b^2)`, `lambdatd` &#8594; `tilde(lambda)`, `(1+1)sQ` &#8594; `[1+1]`, `(1+1)sq` &#8594; `[(1+1)]`)
 - Simple functions: `fo<value> ` &#8594; `f(<value>) ` (e.g. `fox ` &#8594; `f(x) `, `ao5 ` &#8594; `a(5) `)
 - Matrices: `<size>ma` and `<size>lma` (e.g. `23ma` &#8594; 2x3 matrix)
diff --git a/lua/typstar/engine.lua b/lua/typstar/engine.lua
index 54d1dff..914f68e 100644
--- a/lua/typstar/engine.lua
+++ b/lua/typstar/engine.lua
@@ -124,7 +124,7 @@ function M.engine(trigger, opts)
 
         -- custom word trig
         local from = #line - #whole + 1
-        if opts.wordTrig and from ~= 1 and string.match(string.sub(line, from - 1, from - 1), '[%w.]') ~= nil then
+        if opts.wordTrig and from ~= 1 and string.match(line:sub(from - 1, from - 1), '[%w._]') ~= nil then
             return nil
         end
 
diff --git a/lua/typstar/snippets/letters.lua b/lua/typstar/snippets/letters.lua
index 7eaed12..fba50d8 100644
--- a/lua/typstar/snippets/letters.lua
+++ b/lua/typstar/snippets/letters.lua
@@ -129,6 +129,7 @@ return {
     ),
 
     -- series of numbered letters
+    snip('ot(\\w) ', '1, 2, ..., <> ', { cap(1) }, math, 800), -- 1, 2, ..., n
     snip('(' .. trigger_index_pre .. ') ot ', '<>_1, <>_2, ... ', { cap(1), cap(1) }, math), -- a_1, a_2, ...
     snip('(' .. trigger_index_pre .. ') ot(\\w+) ', '<> ', { d(1, get_series) }, math, 1000, { maxTrigLength = 13 }), -- a_1, a_2, ... a_j or a_1, a_2, a_2, a_3, a_4, a_5