On Wednesday, 21 December 2016 23:34:54 UTC+2, mhh...@gmail.com wrote: > > Hi, > > back on my initial question about compiling template, i m looking for some > experienced ideas. > > I have now found out i needed to change the ast tree of template in order > to simplify it for later manipulation. >
The easiest way I can think of is trying to do it in terms of symbolically evaluating of the tree and using the actions as the new tree. https://play.golang.org/p/i-QY-7wJYq Obviously doing the same on the actual structure is more annoying. > So for example i transform this > {{ ("what" | up) | lower }} > into > {{ $some := ("what" | up) }} > {{ $some | lower }} > > And so on, i d like to reach > {{ $some := up "what" }} > {{ lower $some }} > > Which will be as close as possible to regular go code. > > The thing is that the process to do those transformations seems pretty > fragile and tedious. > > I have tree like this > parse.Tree > parse.ActionNode > parse.PipeNode > parse.CommandNode > parse.IdentifierNode Ident="up" > parse.StringNode Quoted="\"some\"" Text="some" > parse.TextNode Text="\n" > parse.ActionNode > parse.PipeNode > parse.CommandNode > parse.StringNode Quoted="\"some\"" Text="some" > parse.CommandNode > parse.IdentifierNode Ident="split" > parse.PipeNode > parse.CommandNode > parse.PipeNode > parse.CommandNode > parse.StringNode Quoted="\"what\"" Text="what" > parse.CommandNode > parse.IdentifierNode Ident="lower" > parse.CommandNode > parse.IdentifierNode Ident="up" > parse.TextNode Text="\n" > > to simplify, one of the algorithm consist of browsing the structure > until it match a Pipe containing a Cmd with an Identifier after a Cmd with > a Pipe > that would match *("what" | lower) | up* > > And so on to simplify more and more the tree. > > I wonder if there are better ways to achieve this kind of transform. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
