handling quotes

lexer.c

@@ -40,7 +40,15 @@ static void pushc(char c)
     lex_process->function->push_char(lex_process, c);
 }
 
-static struct pos lex_file_position()
+static char assert_next_char(char c)
+{
+    char next_c = nextc();
+    assert(c == next_c);
+    return nextc;
+}
+
+static struct pos
+lex_file_position()
 {
     return lex_process->pos;
 }
@@ -414,8 +422,47 @@ struct token *token_make_newline()
     return token_create(&(struct token){.type = TOKEN_TYPE_NEWLINE});
 }
 
+char lex_get_escaped_char(char c)
+{
+    char co = 0;
+    switch (c)
+    {
+    case 'n':
+        co = '\n';
+        break;
+    case '\\':
+        co = '\\';
+        break;
+    case 't':
+        co = '\t';
+        break;
+    case '\'':
+        co = '\'';
+        break;
+    }
+    return co;
+}
+
 struct token *
-read_next_token()
+token_make_quote()
+{
+    assert_next_char('\'');
+    char c = nextc();
+    if (c == '\\')
+    {
+        c = nextc();
+        c = lex_get_escaped_char(c);
+    }
+
+    if (nextc() != '\'')
+    {
+        compiler_error(lex_process->compiler, "Quote was not closed by ' character");
+    }
+
+    return token_create(&(struct token){.type = TOKEN_TYPE_NUMBER, .cval = c});
+}
+
+struct token *read_next_token()
 {
     struct token *token = NULL;
     char c = peekc();
@@ -444,6 +491,10 @@ read_next_token()
         token = token_make_string('"', '"');
         break;
 
+    case '\'':
+        token = token_make_quote();
+        break;
+
     // Ignoring whitespaces
     case ' ':
     case '\t':

test.c

@@ -4,3 +4,5 @@
     /*
     multile line comment
     */
+
+    'a' '\n' '\t'