protected override Expression VisitDeferredSectionExpression(DeferredSectionExpression dsex)
{
var method = new Action <object, BindingContext, Action <TextWriter, object>, Action <TextWriter, object> >(RenderSection).Method;
Expression path = HandlebarsExpression.Path(dsex.Path.Path.Substring(1));
Expression context = CompilationContext.BindingContext;
Expression[] templates = GetDeferredSectionTemplates(dsex);
return(Expression.Call(method, new[] { path, context }.Concat(templates)));
}
protected virtual Expression VisitDeferredSectionExpression(DeferredSectionExpression dsex)
{
PathExpression path = (PathExpression)Visit(dsex.Path);
// Don't visit Body/Inversion - they will be compiled separately
if (path != dsex.Path)
{
return(HandlebarsExpression.DeferredSection(path, dsex.Body, dsex.Inversion));
}
return(dsex);
}
protected override Expression VisitDeferredSectionExpression(DeferredSectionExpression dsex)
{
#if netstandard
var method = new Action<object, BindingContext, Action<TextWriter, object>, Action<TextWriter, object>>(RenderSection).GetMethodInfo();
#else
var method = new Action<object, BindingContext, Action<TextWriter, object>, Action<TextWriter, object>>(RenderSection).Method;
#endif
Expression path = HandlebarsExpression.Path(dsex.Path.Path.Substring(1));
Expression context = CompilationContext.BindingContext;
Expression[] templates = GetDeferredSectionTemplates(dsex);
return Expression.Call(method, new[] {path, context}.Concat(templates));
}
private Expression[] GetDeferredSectionTemplates(DeferredSectionExpression dsex)
{
var fb = new FunctionBuilder(CompilationContext.Configuration);
var body = fb.Compile(dsex.Body.Expressions, CompilationContext.BindingContext);
var inversion = fb.Compile(dsex.Inversion.Expressions, CompilationContext.BindingContext);
var sectionPrefix = dsex.Path.Path.Substring(0, 1);
switch (sectionPrefix)
{
case "#":
return new[] {body, inversion};
case "^":
return new[] {inversion, body};
default:
throw new HandlebarsCompilerException("Tried to compile a section expression that did not begin with # or ^");
}
}
private Expression[] GetDeferredSectionTemplates(DeferredSectionExpression dsex)
{
var fb = new FunctionBuilder(CompilationContext.Configuration);
var body = fb.Compile(dsex.Body.Expressions, CompilationContext.BindingContext);
var inversion = fb.Compile(dsex.Inversion.Expressions, CompilationContext.BindingContext);
var sectionPrefix = dsex.Path.Path.Substring(0, 1);
switch (sectionPrefix)
{
case "#":
return(new[] { body, inversion });
case "^":
return(new[] { inversion, body });
default:
throw new HandlebarsCompilerException("Tried to compile a section expression that did not begin with # or ^");
}
}
protected override Expression VisitDeferredSectionExpression(DeferredSectionExpression dsex)
{
Action<object, BindingContext, Action<TextWriter, object>> method;
if (dsex.Path.Path.StartsWith("#"))
{
method = RenderSection;
}
else if (dsex.Path.Path.StartsWith("^"))
{
method = RenderEmptySection;
}
else
{
throw new HandlebarsCompilerException("Tried to compile a section expression that did not begin with # or ^");
}
return Expression.Call(
method.Method,
HandlebarsExpression.Path(dsex.Path.Path.Substring(1)),
CompilationContext.BindingContext,
new FunctionBuilder(CompilationContext.Configuration).Compile(dsex.Body, CompilationContext.BindingContext));
}
protected override Expression VisitDeferredSectionExpression(DeferredSectionExpression dsex)
{
Action <object, BindingContext, Action <TextWriter, object> > method;
if (dsex.Path.Path.StartsWith("#"))
{
method = RenderSection;
}
else if (dsex.Path.Path.StartsWith("^"))
{
method = RenderEmptySection;
}
else
{
throw new HandlebarsCompilerException("Tried to compile a section expression that did not begin with # or ^");
}
return(Expression.Call(
method.Method,
HandlebarsExpression.Path(dsex.Path.Path.Substring(1)),
CompilationContext.BindingContext,
new FunctionBuilder(CompilationContext.Configuration).Compile(dsex.Body, CompilationContext.BindingContext)));
}
protected virtual Expression VisitDeferredSectionExpression(DeferredSectionExpression dsex)
{
return dsex;
}
protected virtual Expression VisitDeferredSectionExpression(DeferredSectionExpression dsex)
{
return(dsex);
}
