Added semicolon support to combine several statements in one line.

kalk/src/lexer.rs

@@ -27,6 +27,7 @@ pub enum TokenKind {
     OpenParenthesis,
     ClosedParenthesis,
     Comma,
+    Semicolon,
 
     EOF,
 }
@@ -105,6 +106,7 @@ impl<'a> Lexer<'a> {
             '=' => build(TokenKind::Equals, "", span),
             '!' => build(TokenKind::Exclamation, "", span),
             ',' => build(TokenKind::Comma, "", span),
+            ';' => build(TokenKind::Semicolon, "", span),
             _ => build(TokenKind::Unknown, "", span),
         };
 
@@ -196,7 +198,7 @@ fn build(kind: TokenKind, value: &str, span: (usize, usize)) -> Token {
 
 fn is_valid_identifier(c: Option<&char>) -> bool {
     if let Some(c) = c {
-        regex::Regex::new(r"[^\s\n\r0-9\+-/\*\^!\(\)=\.,|⌊⌋⌈⌉]")
+        regex::Regex::new(r"[^\s\n\r0-9\+-/\*\^!\(\)=\.,;|⌊⌋⌈⌉]")
             .unwrap()
             .is_match(&c.to_string())
     } else {

kalk/src/parser.rs

@@ -89,6 +89,10 @@ pub fn parse(context: &mut Context, input: &str) -> Result<Vec<Stmt>, CalcError>
     let mut statements: Vec<Stmt> = Vec::new();
     while !is_at_end(context) {
         statements.push(parse_stmt(context)?);
+
+        if match_token(context, TokenKind::Semicolon) {
+            advance(context);
+        }
     }
 
     Ok(statements)