Replaced s:enable with an overload of s:when to simplify the language

docs/syntax.md

@@ -220,10 +220,6 @@ As prop, attribute variants of `for` and `for-props`. They add attributes/values
 
 As for the element version, to introduce the value of an expression as value of a prop `xxx`.
 
-### enable.xxx
-
-If the condition is true, the prop `xxx` is added with no specific value.
-
 ### prop.xxx
 
 To generate new property whose name and value are determined by the pair passed as value.
@@ -236,4 +232,8 @@ To generate new property whose name and value are determined by the pair passed
 
 ### when
 
-To test if the current element should be shown, if and only if the expression is `true`.
+To test if the current element should be rendered, if and only if the expression is `true`.
+
+### when.xxx
+
+If and only if the condition is true, the prop `xxx` is added as empty string. Else it is skipped.

include/vs-templ.hpp

@@ -191,7 +191,6 @@ struct preprocessor{
             const char *PROP_NAME_PROP;
             const char *PROP_VALUE_PROP;
 
-            const char *ENABLE_PROP;
 
             const char *WHEN_PROP;
 

src/app/main.cpp

@@ -47,6 +47,10 @@ bool includefn (const char* path, pugi::xml_document& ref){
 }
 
 int main(int argc, const char* argv[]){
+    //Workaround to avoid problems with pugixml... but it is not perfect. 
+    //The solution is to never use `as_float` and always handle them externally.
+    std::setlocale(LC_ALL, "C");
+
     const char* ns_prefix="s:";
     if(argc==0 || argc > 4){
         std::cerr<<"Wrong usage:\n\t"<<argv[0]<<" <template-file> <data-file> [namespace=`s:`]\nOR\t "<<argv[0]<<"[namespace=`s:`] and two input streams\n";

src/vs-templ.cpp

@@ -250,7 +250,6 @@ void preprocessor::ns_strings::prepare(const char * ns_prefix){
         STRLEN("for-props.src")+STRLEN("for-props.filter")+STRLEN("for.order-by")+STRLEN("for-props.offset")+STRLEN("for-props.limit")+
 
         STRLEN("value")+
-        STRLEN("enable")+
         STRLEN("prop.name")+STRLEN("prop.value")+
         STRLEN("when")
         ];
@@ -293,7 +292,6 @@ void preprocessor::ns_strings::prepare(const char * ns_prefix){
 
     WRITE(VALUE_PROP,"value"); 
 
-    WRITE(ENABLE_PROP,"enable"); 
 
     WRITE(PROP_NAME_PROP,"prop.name");
     WRITE(PROP_VALUE_PROP,"prop.value");
@@ -907,12 +905,12 @@ void preprocessor::_parse(std::optional<pugi::xml_node_iterator> stop_at){
                             /* Error? */
                         }
                     }
-                    else if(cexpr_strneqv(attr.name()+ns_prefix.length(),"enable.")){
+                    else if(cexpr_strneqv(attr.name()+ns_prefix.length(),"when.")){
                         auto val = resolve_expr(attr.value());
                         if(val.has_value() && std::holds_alternative<int>(*val)){
                             auto v = (val.value());
                             if(std::get<int>(*val)==true){
-                                last.append_attribute(attr.name()+ns_prefix.length()+sizeof("enable.")-1);
+                                last.append_attribute(attr.name()+ns_prefix.length()+sizeof("when.")-1);
                             }
                             /* Error? */
                         }