From 44b2cf820149eb751474d9ccd2746359da73a4e9 Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Tue, 14 Jan 2020 22:24:50 +0100
Subject: Lex (WIP)

---
 minicc.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'minicc.cpp')

diff --git a/minicc.cpp b/minicc.cpp
index f283e1f..07090a8 100644
--- a/minicc.cpp
+++ b/minicc.cpp
@@ -37,17 +37,22 @@ BNF Reverse(BNF bnf){
 
 std::vector<std::string> Lex(std::string s, std::string Top, BNF bnf)
 {
+ std::vector<std::string> result;
+ std::string token;
+
  BNF ReverseBNF{ Reverse(bnf)};
 
- size_t pos{0};
+ std::string Whitespace{"\t \n\r"};
 
- while (pos < s.size()) {
+ for (size_t pos{0}; pos < s.size(); pos++) {
   char c{s[pos]};
+  if (token.empty() and Whitespace.find(c) != std::string::npos)
+   continue; // skip whitespace between tokens
+
   auto Path = GetPath(std::string{1, c}, ReverseBNF, Top);
-  pos++;
  }
 
- return {};
+ return result;
 }
 
 ProgramNode Compile(std::vector<std::string> Tokens, std::string Top, BNF bnf, Terminals terminals)
-- 
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