Fix signed/unsigned warnings.

This commit wasn't tested (for a lack of tests) but was reviewed and should be safe.

context.cpp

@@ -52,8 +52,7 @@ namespace Sass {
   
   Context::~Context()
   {
-    int i;
-    for (i = 0; i < source_refs.size(); ++i) {
+    for (size_t i = 0; i < source_refs.size(); ++i) {
       delete[] source_refs[i];
     }
     // cerr << "Deallocated " << i << " source string(s)." << endl;
@@ -117,4 +116,4 @@ namespace Sass {
     register_function(not_descriptor, not_impl);
   }
   
-}
+}
\ No newline at end of file

eval_apply.cpp

@@ -45,7 +45,7 @@ namespace Sass {
       } break;
       
       case Node::root: {
-        for (int i = 0; i < expr.size(); ++i) {
+        for (size_t i = 0; i < expr.size(); ++i) {
           eval(expr[i], env, f_env, registry);
         }
         return expr;
@@ -54,7 +54,7 @@ namespace Sass {
       case Node::block: {
         Environment current;
         current.link(env);
-        for (int i = 0; i < expr.size(); ++i) {
+        for (size_t i = 0; i < expr.size(); ++i) {
           eval(expr[i], current, f_env, registry);
         }
         return expr;
@@ -63,7 +63,7 @@ namespace Sass {
       case Node::assignment: {
         Node val(expr[1]);
         if (val.type == Node::comma_list || val.type == Node::space_list) {
-          for (int i = 0; i < val.size(); ++i) {
+          for (size_t i = 0; i < val.size(); ++i) {
             if (val[i].eval_me) val[i] = eval(val[i], env, f_env, registry);
           }
         }
@@ -83,7 +83,7 @@ namespace Sass {
       case Node::rule: {
         Node rhs(expr[1]);
         if (rhs.type == Node::comma_list || rhs.type == Node::space_list) {
-          for (int i = 0; i < rhs.size(); ++i) {
+          for (size_t i = 0; i < rhs.size(); ++i) {
             if (rhs[i].eval_me) rhs[i] = eval(rhs[i], env, f_env, registry);
           }
         }
@@ -104,7 +104,7 @@ namespace Sass {
       
       case Node::disjunction: {
         Node result;
-        for (int i = 0; i < expr.size(); ++i) {
+        for (size_t i = 0; i < expr.size(); ++i) {
           // if (expr[i].type == Node::relation ||
           //     expr[i].type == Node::function_call && expr[0].content.token.to_string() == "not") {
           result = eval(expr[i], env, f_env, registry);
@@ -116,7 +116,7 @@ namespace Sass {
       
       case Node::conjunction: {
         Node result;
-        for (int i = 0; i < expr.size(); ++i) {
+        for (size_t i = 0; i < expr.size(); ++i) {
           result = eval(expr[i], env, f_env, registry);
           if (result.type == Node::boolean && result.content.boolean_value == false) return result;
         }
@@ -367,13 +367,13 @@ namespace Sass {
     Node body(mixin[2].clone(registry));
     Environment bindings;
     // bind arguments
-    for (int i = 0, j = 0; i < args.size(); ++i) {
+    for (size_t i = 0, j = 0; i < args.size(); ++i) {
       if (args[i].type == Node::assignment) {
         Node arg(args[i]);
         Token name(arg[0].content.token);
         // check that the keyword arg actually names a formal parameter
         bool valid_param = false;
-        for (int k = 0; k < params.size(); ++k) {
+        for (size_t k = 0; k < params.size(); ++k) {
           Node param_k = params[k];
           if (param_k.type == Node::assignment) param_k = param_k[0];
           if (arg[0] == param_k) {
@@ -421,7 +421,7 @@ namespace Sass {
   {
     map<Token, Node> bindings;
     // bind arguments
-    for (int i = 0, j = 0; i < args.size(); ++i) {
+    for (size_t i = 0, j = 0; i < args.size(); ++i) {
       if (args[i].type == Node::assignment) {
         Node arg(args[i]);
         Token name(arg[0].content.token);
@@ -436,4 +436,4 @@ namespace Sass {
     return f(bindings, registry);
   }
 
-}
+}
\ No newline at end of file

functions.hpp

@@ -30,7 +30,7 @@ namespace Sass {
       while (d[len+1]) ++len;
       
       parameters.reserve(len);
-      for (int i = 0; i < len; ++i) {
+      for (size_t i = 0; i < len; ++i) {
         const char* p = d[i+1];
         Token name(Token::make(p, p + std::strlen(p)));
         parameters.push_back(name);

node.hpp

@@ -190,7 +190,7 @@ namespace Sass {
     
     Node& operator+=(const Node& n)
     {
-      for (int i = 0; i < n.size(); ++i) {
+      for (size_t i = 0; i < n.size(); ++i) {
         content.children->push_back(n[i]);
       }
       return *this;
@@ -278,4 +278,4 @@ namespace Sass {
     
     ~Node() { ++destructed; }
   };
-}
+}
\ No newline at end of file

node_comparisons.cpp

@@ -25,7 +25,7 @@ namespace Sass {
       case space_list:
       case expression:
       case term: {
-        for (int i = 0; i < size(); ++i) {
+        for (size_t i = 0; i < size(); ++i) {
           if (at(i) == rhs[i]) continue;
           else return false;
         }
@@ -101,4 +101,4 @@ namespace Sass {
   bool Node::operator>=(const Node& rhs) const
   { return !(*this < rhs); }
   
-}
+}
\ No newline at end of file

sass_interface.cpp

@@ -47,8 +47,7 @@ extern "C" {
     // cerr << "Destructions:\t" << Node::destructed << endl;
     // cerr << "Registry size:\t" << doc.context.registry.size() << endl;
     
-    int i;
-    for (i = 0; i < doc.context.registry.size(); ++i) {
+    for (size_t i = 0; i < doc.context.registry.size(); ++i) {
       delete doc.context.registry[i];
     }
     // cerr << "Deallocations:\t" << i << endl;
@@ -133,4 +132,4 @@ extern "C" {
     return 1;
   }
 
-}
+}
\ No newline at end of file