feat: add comments

exl/comment.fzs

@@ -0,0 +1,3 @@
+// I'm a comment
+printline("Comment is skipped")
+

include/compiler/fzl_token.h

@@ -16,6 +16,8 @@ typedef enum
   FZL_TOKTYPE_NAME, // abc
   FZL_TOKTYPE_TYPE, // i16
 
+  FZL_TOKTYPE_DDASH, // // :D
+
   FZL_TOKTYPE_LPAREN, // (
   FZL_TOKTYPE_RPAREN, // )
   FZL_TOKTYPE_LBRACE, // {

src/compiler/fzl_reader.c

@@ -189,6 +189,17 @@ fzl_token_t *add_double(fzl_reader_t *reader, fzl_toktype_t type)
 {
   size_t p = move(reader, 2);
   return fzl_mktoken(type, reader->line_n, p - reader->line_start, NULL, 0);
+
+// Skip symbols until '\n' or EOF
+void skip_comment(fzl_reader_t *reader)
+{
+  move(reader, 2);
+
+  while (reader->position < reader->size)
+  {
+    if (reader->source[reader->position++] == '\n')
+      break;
+  }
 }
 
 int fzl_read(fzl_reader_t *reader)
@@ -210,6 +221,11 @@ int fzl_read(fzl_reader_t *reader)
 
     if (curr == '\'' || curr == '"')
       token = parse_string_literal(reader);
+    else if (curr == '/' && reader->source[p + 1] == '/')
+    {
+      skip_comment(reader);
+      continue;
+    }
     else if (curr == '=' && reader->source[p + 1] == '=')
       token = add_double(reader, FZL_TOKTYPE_EQEQ);
     else if (curr == '>' && reader->source[p + 1] == '=')