C++ element definitions now support any kind of arithmetic types (#11)

Updated static list parser.
Now it can have same syntax as any script may have. E.g.:
- `{1,2,3}` lua style list;
- `[1,2,3]` js style list;
- `(a,b,c)` python tuple;

Old syntax without brackets is also supported.

Additionally fixed several issues in tests, improved test coverage,
added tests for parser, field validation.

Found a problem with `required` field not working for fields that are
missing from the xml node (only if field parsing failed we were getting
an error).

Author: Unix4ever

README.md

@@ -46,7 +46,7 @@ Vue Special Syntax
 - `v-if/v-else-if/v-else`.
 - `v-for` (does not support int index e.g.: `value, key, index`).
 - `v-on`.
-  - `v-on:(click:mousedown|mouseup|mouseover|mouseout)[.[ctrl|alt|meta|shift|exact]]`.
+  - `v-on:(click|mousedown|mouseup|mouseover|mouseout)[.[ctrl|alt|meta|shift|exact]]`.
   - `v-on:(keyup|keydown|keypress)[.][<key_code>]`.
   - `v-on:change`.
 - Attributes starting with `:` are treated as `v-bind:...`.

src/imvue.cpp

@@ -257,32 +257,6 @@ namespace ImVue {
       return;
     }
 
-    if(!mConfigured) {
-      // register some built-in element types
-      mCtx->factory->element<Document>("template");
-      mCtx->factory->element<Element>("__element__")
-        .handler<MouseEventHandler>("click")
-        .handler<MouseEventHandler>("mousedown")
-        .handler<MouseEventHandler>("mouseup")
-        .handler<MouseEventHandler>("mouseover")
-        .handler<MouseEventHandler>("mouseout")
-        .handler<MouseEventHandler>("mouseout")
-        .handler<ChangeEventHandler>("change")
-        .handler<KeyboardEventHandler>("keydown")
-        .handler<KeyboardEventHandler>("keyup")
-        .handler<KeyboardEventHandler>("keypress")
-        .attribute("id", &Element::id)
-        .attribute("key", &Element::key)
-        .attribute("ref", &Element::ref);
-
-      mCtx->factory->element<Slot>("slot");
-
-      mCtx->factory->element<SvgImage>("svg-image")
-        .attribute("size", &SvgImage::size)
-        .attribute("src", &SvgImage::src, true)
-        .attribute("tint-col", &SvgImage::tint_col);
-    }
-
     mScriptState = mCtx->script;
 
     std::stringstream ss;

src/imvue_element.cpp

@@ -225,6 +225,7 @@ namespace ImVue {
     , mScriptContext(0)
     , mInvalidFlags(0)
     , mFlags(0)
+    , mRequiredAttrsCount(0)
     , mConfigured(false)
   {
   }
@@ -349,6 +350,9 @@ namespace ImVue {
     Attribute* reader = mBuilder->get(id);
     if(reader) {
       reader->read(id, value, this, mScriptState, flags, fields);
+      if(reader->required) {
+        mRequiredAttrsCount++;
+      }
       return true;
     }
 
@@ -366,6 +370,7 @@ namespace ImVue {
     }
 
     int flags = mConfigured ? 0 : Attribute::BIND_LISTENERS;
+    mRequiredAttrsCount = 0;
 
     for(const rapidxml::xml_attribute<>* a = mNode->first_attribute(); a; a = a->next_attribute()) {
       readProperty(a->name(), a->value(), flags);
@@ -376,6 +381,26 @@ namespace ImVue {
     if(ref && mScriptState) {
       mScriptState->addReference(ref, this);
     }
+
+    const ElementBuilder::RequiredAttrs& requiredAttrs = mBuilder->getRequiredAttrs();
+    if(mRequiredAttrsCount != requiredAttrs.size()) {
+      std::map<const char*, bool, CmpChar> visited;
+      // failed validation, now scan props and detect which one is missing
+      for(const rapidxml::xml_attribute<>* a = mNode->first_attribute(); a; a = a->next_attribute()) {
+        visited[a->name()] = true;
+      }
+
+      std::stringstream missed;
+      for(int i = 0; i < requiredAttrs.size(); ++i) {
+        const char* name = requiredAttrs[i];
+        if(!visited[name]) {
+          missed << (missed.str().empty() ? "" : ", ") << '"' << name << '"';
+        }
+      }
+
+      IMVUE_EXCEPTION(ElementError, "failed to build element %s, missing required properties %s", getType(), missed.str().c_str());
+      return false;
+    }
     return enabled;
   }
 
@@ -483,7 +508,7 @@ namespace ImVue {
 
     EventHandler* handler = builder->createHandler(handlerName, fullName, value);
     if(!handler) {
-      IMVUE_EXCEPTION(ElementError, "failed create handler of type %s", handlerName);
+      IMVUE_EXCEPTION(ElementError, "failed to create handler of type %s", handlerName);
       return;
     }
     mHandlers[name] = handler;