New node type for hex triples. Modified the emitter to print hex triples…

New node type for hex triples. Modified the emitter to print hex triples correctly. Next: hex triple arithmetic.

evaluator.cpp

@@ -57,10 +57,29 @@ namespace Sass {
       } break;
 
       case Node::textual_hex: {
-        long numval = std::strtol(expr.token.begin + 1, NULL, 16);
-        Node result(expr.line_number, numval);
-        result.is_hex = true;
-        return result;
+        // long numval = std::strtol(expr.token.begin + 1, NULL, 16);
+        // Node result(expr.line_number, numval);
+        // result.is_hex = true;
+        // return result;
+        
+        Node triple(expr.line_number, Node::hex_triple, 3);
+        Token hext(expr.token.begin+1, expr.token.end);
+        
+        if (hext.length() == 6) {
+          for (int i = 0; i < 6; i += 2) {
+            Node thing(expr.line_number, static_cast<double>(std::strtol(string(hext.begin+i, 2).c_str(), NULL, 16)));
+            cerr << "evaled a hex triplet: " << thing.to_string("") << endl;
+            triple << Node(expr.line_number, static_cast<double>(std::strtol(string(hext.begin+i, 2).c_str(), NULL, 16)));
+          }
+        }
+        else {
+          for (int i = 0; i < 3; ++i) {
+            triple << Node(expr.line_number, static_cast<double>(std::strtol(string(2, hext.begin[i]).c_str(), NULL, 16)));
+          }
+        }
+        
+        return triple;
+        
       } break;
       
       default: {

hex_math.scss

+div {
+  p01: #abc;
+  p02: #aabbcc;
+  p03: #abc + hello;
+  p04: #abc + 1; // add 1 to each triplet
+  p05: #abc + #001; // triplet-wise addition
+  p06: #0000ff + 1; // add 1 to each triplet; ignore overflow because it doesn't correspond to a color name
+  p07: #0000ff + #000001; // convert overflow to name of color (blue)
+  p08: #00ffff + #000101; // aqua
+  p09: #000000;
+  p10: #000000 - 1; // black
+  p11: #000000 - #000001; // black
+  p12: #ffff00 + #010100; // yellow
+  p13: (#101010 / 7)
+}
\ No newline at end of file

node.cpp

 #include <iostream>
+#include <iomanip>
 #include <string>
 #include <cctype>
 #include <cstdlib>
@@ -139,6 +140,15 @@ namespace Sass {
         return ss.str();
       } break;
       
+      case hex_triple: {
+        stringstream ss;
+        ss << '#' << std::setw(2) << std::setfill('0');
+        for (int i = 0; i < 3; ++i) {
+          ss  << std::hex << std::setw(2) << static_cast<long>(children->at(i).numeric_value);
+        }
+        return ss.str();
+      } break;
+
       default: {
         return string(token);
       } break;

node.hpp

@@ -58,6 +58,7 @@ namespace Sass {
       numeric_percentage,
       numeric_dimension,
       number,
+      hex_triple,
 
       comment
     };