From 68bf2f428832629c8fccc80347e298b32996cd11 Mon Sep 17 00:00:00 2001
From: Yann Ahlgrim <yann@yann-x1carbon.ahlgrim.net>
Date: Thu, 7 May 2026 10:22:48 +0200
Subject: [PATCH] update

---
 .gitignore       |  5 +++++
 Cargo.lock       |  7 +++++++
 Cargo.toml       |  6 ++++++
 src/lexer/mod.rs | 23 +++++++++++++++++++++++
 src/main.rs      |  6 ++++++
 src/token/mod.rs | 19 +++++++++++++++++++
 6 files changed, 66 insertions(+)
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/lexer/mod.rs
 create mode 100644 src/main.rs
 create mode 100644 src/token/mod.rs

diff --git a/.gitignore b/.gitignore
index ad67955..0728338 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,8 @@ target
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+
+# Added by cargo
+
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..1dde1f6
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "rust-interpreter"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..f53e714
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rust-interpreter"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/lexer/mod.rs b/src/lexer/mod.rs
new file mode 100644
index 0000000..15fc881
--- /dev/null
+++ b/src/lexer/mod.rs
@@ -0,0 +1,23 @@
+struct Lexer {
+    input: String,
+    position: Option<i32>,
+    read_pos: Option<i32>,
+    ch: Option<i8>,
+}
+
+fn new(input_str: String) -> Lexer {
+    let l: Lexer = Lexer {
+        input: input_str,
+        position: None,
+        read_pos: None,
+        ch: None,
+    };
+    l
+}
+
+fn read_char(l: Lexer) {
+    let read_pos = usize::try_from(l.read_pos.unwrap());
+    if read_pos >= l.input.len() {
+        l.ch = 0;
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..4021de5
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,6 @@
+mod lexer;
+mod token;
+
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/src/token/mod.rs b/src/token/mod.rs
new file mode 100644
index 0000000..bcfd3f4
--- /dev/null
+++ b/src/token/mod.rs
@@ -0,0 +1,19 @@
+struct Token {
+    type_: String,
+    literal: String,
+}
+
+const ILLEGAL: &str = "ILLEGAL";
+const EOF: &str = "EOF";
+const IDENT: &str = "IDENT";
+const INT: &str = "INT";
+const ASSIGN: &str = "=";
+const PLUS: &str = "+";
+const COMMA: &str = ",";
+const SEMICOLON: &str = ";";
+const LPAREN: &str = "(";
+const RPAREN: &str = ")";
+const LBRACE: &str = "{";
+const RBRACE: &str = "}";
+const FUNCTION: &str = "FUNCTION";
+const LET: &str = "LET";