Allow_identifiers_to_have_underscores

reid/lib/std.reid

@@ -1,18 +1,18 @@
 
 extern fn puts(message: *str) -> i32;
 
-struct DivT {
+struct div_t {
     quotient: i32,
     remainder: i32,
 }
 
-extern fn div(numerator: i32, denominator: i32) -> DivT;
+extern fn div(numerator: i32, denominator: i32) -> div_t;
 
 pub fn print(message: *str) {
     puts(message);
 }
 
-pub fn intdiv(numerator: i32, denominator: i32) -> DivT {
+pub fn int_div(numerator: i32, denominator: i32) -> div_t {
     return div(numerator, denominator);
 }
 

reid/src/lexer.rs

@@ -265,7 +265,7 @@ pub fn tokenize<T: Into<String>>(to_tokenize: T) -> Result<Vec<FullToken>, Error
             c if c.is_alphabetic() => {
                 let mut value = character.to_string();
                 while let Some(c) = cursor.first() {
-                    if !c.is_ascii_alphanumeric() {
+                    if !(c.is_ascii_alphanumeric() || c == '_') {
                         break;
                     }
                     value += &c.to_string();

reid_src/std_test.reid

@@ -1,11 +1,11 @@
 
 import std::print;
-import std::intdiv;
+import std::int_div;
 
 fn main() -> i32 {
     let hello = "hello world";
 
     print(hello);
 
-    return intdiv(15, 5).quotient;
+    return int_div(15, 5).quotient;
 }