parser: Parse integers arithmetic expression

This patch implements the AST creation for arithmetic expressions.

NOTE:

The implementation works only for integer numbers.

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
Reviewed-by: Carlos Maniero <carlosmaniero@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/lexer.h b/src/lexer.h
index ae8ab60..9f45910 100644
--- a/src/lexer.h
+++ b/src/lexer.h
@@ -42,6 +42,7 @@ typedef struct token_t {
   char         *filepath;
   uint32_t      row;
   uint32_t      col;
+  uint32_t      bol;
 } token_t;
 
 
@@ -68,6 +69,8 @@ bool lexer_is_not_eof(lexer_t *lexer);
 
 void lexer_drop_char(lexer_t *lexer);
 
+void lexer_step_back_to(lexer_t *lexer, token_t *token);
+
 char * token_kind_to_str(token_kind_t kind);
 
 #endif /* LEXER_H */