Merge branch 'release-5.x' into develop

cheatsheet.md

@@ -91,6 +91,33 @@ chai.add(chaiscript::user_type<MyClass>(), "MyClass");
 
 User defined type conversions are possible, defined in either script or in C++.
 
+
+### ChaiScript Defined Conversions
+
+Function objects (including lambdas) can be used to add type conversions
+from inside of ChaiScript:
+
+```
+add_type_conversion(type("string"), type("Type_Info"), fun(s) { return type(s); });
+```
+
+### C++ Defined Conversions
+
+Invoking a C++ type conversion possible with `static_cast`
+
+```
+chai.add(chaiscript::type_conversion<T, bool>());
+```
+
+Calling a user defined type conversion that takes a lambda
+
+```
+chai.add(chaiscript::type_conversion<TestBaseType, Type2>([](const TestBaseType &t_bt) { /* return converted thing */ }));
+```
+
+
+### Helpers
+
 A helper function exists for strongly typed and ChaiScript `Vector` function conversion definition:
 
 ```
@@ -104,6 +131,7 @@ chai.add(chaiscript::map_conversion<std::map<std::string, int>>());
 ```
 
 
+
 This allows you to pass a ChaiScript function to a function requiring `std::vector<int>`
 
 ## Adding Objects

include/chaiscript/language/chaiscript_common.hpp

@@ -537,9 +537,9 @@ namespace chaiscript
       }
 
 
-      static bool get_bool_condition(const Boxed_Value &t_bv) {
+      static bool get_bool_condition(const Boxed_Value &t_bv, const chaiscript::detail::Dispatch_State &t_ss) {
         try {
-          return boxed_cast<bool>(t_bv);
+          return t_ss->boxed_cast<bool>(t_bv);
         }
         catch (const exception::bad_boxed_cast &) {
           throw exception::eval_error("Condition not boolean");

include/chaiscript/language/chaiscript_eval.hpp

@@ -773,7 +773,7 @@ namespace chaiscript
           chaiscript::eval::detail::Scope_Push_Pop spp(t_ss);
 
           try {
-            while (this->get_bool_condition(this->children[0]->eval(t_ss))) {
+            while (this->get_bool_condition(this->children[0]->eval(t_ss), t_ss)) {
               try {
                 this->children[1]->eval(t_ss);
               } catch (detail::Continue_Loop &) {
@@ -815,13 +815,12 @@ namespace chaiscript
           { assert(this->children.size() == 3); }
 
         Boxed_Value eval_internal(const chaiscript::detail::Dispatch_State &t_ss) const override {
-          if (this->get_bool_condition(this->children[0]->eval(t_ss))) {
+          if (this->get_bool_condition(this->children[0]->eval(t_ss), t_ss)) {
             return this->children[1]->eval(t_ss);
           } else {
             return this->children[2]->eval(t_ss);
           }
         }
-
     };
 
 
@@ -834,7 +833,7 @@ namespace chaiscript
         }
 
         Boxed_Value eval_internal(const chaiscript::detail::Dispatch_State &t_ss) const override {
-          if (this->get_bool_condition(this->children[0]->eval(t_ss))) {
+          if (this->get_bool_condition(this->children[0]->eval(t_ss), t_ss)) {
             return this->children[1]->eval(t_ss);
           } else {
             return this->children[2]->eval(t_ss);
@@ -932,7 +931,7 @@ namespace chaiscript
           try {
             for (
                 this->children[0]->eval(t_ss);
-                this->get_bool_condition(this->children[1]->eval(t_ss));
+                this->get_bool_condition(this->children[1]->eval(t_ss), t_ss);
                 this->children[2]->eval(t_ss)
                 ) {
               try {
@@ -1482,8 +1481,8 @@ namespace chaiscript
 
         Boxed_Value eval_internal(const chaiscript::detail::Dispatch_State &t_ss) const override
         {
-          return const_var(this->get_bool_condition(this->children[0]->eval(t_ss))
-              && this->get_bool_condition(this->children[1]->eval(t_ss)));
+          return const_var(this->get_bool_condition(this->children[0]->eval(t_ss), t_ss)
+              && this->get_bool_condition(this->children[1]->eval(t_ss), t_ss));
         }
 
     };
@@ -1496,8 +1495,8 @@ namespace chaiscript
 
         Boxed_Value eval_internal(const chaiscript::detail::Dispatch_State &t_ss) const override
         {
-          return const_var(this->get_bool_condition(this->children[0]->eval(t_ss))
-              || this->get_bool_condition(this->children[1]->eval(t_ss)));
+          return const_var(this->get_bool_condition(this->children[0]->eval(t_ss), t_ss)
+              || this->get_bool_condition(this->children[1]->eval(t_ss), t_ss));
         }
     };
   }

unittests/conversion_to_bool.chai

@@ -0,0 +1,17 @@
+
+// all we care is that this executes, really
+
+add_type_conversion(type("int"), type("bool"), fun(int i) { return i != 0; });
+
+if (0) {
+  assert_true(false);
+}
+
+while (0) {
+  assert_true(false);
+}
+
+for (; 0; ) {
+  assert_true(false);
+}
+