From 244e46ed692e9d2a7c4be7c0f5adda03239ee2fd Mon Sep 17 00:00:00 2001
From: Anhgelus Morhtuuzh <william@herges.fr>
Date: Mon, 10 Nov 2025 00:21:40 +0100
Subject: feat(parser): supports _ in numbers

---
 example/input.txt                | 2 +-
 src/elixir_math_parser.yrl       | 4 +++-
 src/elixir_math_parser_lexer.xrl | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/example/input.txt b/example/input.txt
index 32146f2..1f4789b 100644
--- a/example/input.txt
+++ b/example/input.txt
@@ -1,7 +1,7 @@
 a = 7;; b = 4
 (a + b) * 10 / 2
 
-x = 20
+x = 2_0
 y = 2!
 z = y/2 
 10 + 4(z / y)(x / 4)
diff --git a/src/elixir_math_parser.yrl b/src/elixir_math_parser.yrl
index f8de916..4e8e9e9 100644
--- a/src/elixir_math_parser.yrl
+++ b/src/elixir_math_parser.yrl
@@ -54,4 +54,6 @@ expr -> '-' exprs : {sub_op, {int, 0, 0}, '$2'}.
 
 Erlang code.
 
-unwrap({int, Line, Value}) -> {int, Line, list_to_integer(Value)}.
+unwrap({int, Line, Value}) -> 
+    Match = fun(X) -> not(X == 95) end,
+    {int, Line, list_to_integer(lists:filter(Match, Value))}.
diff --git a/src/elixir_math_parser_lexer.xrl b/src/elixir_math_parser_lexer.xrl
index c29416e..c418c02 100644
--- a/src/elixir_math_parser_lexer.xrl
+++ b/src/elixir_math_parser_lexer.xrl
@@ -1,5 +1,5 @@
 Definitions.
-INT        = [0-9]+
+INT        = [0-9_]+
 NAME       = [a-zA-Z_][a-zA-Z0-9_]*
 WHITESPACE = [\s\t\r]
 COMMENT    = #[^\n]*\n?
-- 
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