From 9296d1303ed7baa88507e683c23319c75df341d8 Mon Sep 17 00:00:00 2001
From: Dirkjan Ochtman <dirkjan@ochtman.nl>
Date: Sat, 18 Feb 2017 13:15:49 +0100
Subject: Add support for attributes

---
 askama/src/generator.rs |  6 ++++++
 askama/src/parser.rs    | 12 +++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/askama/src/generator.rs b/askama/src/generator.rs
index a8d62af..4ebc61a 100644
--- a/askama/src/generator.rs
+++ b/askama/src/generator.rs
@@ -119,6 +119,11 @@ impl<'a> Generator<'a> {
         }
     }
 
+    fn visit_attr(&mut self, obj: &Expr, attr: &str) {
+        self.visit_expr(obj);
+        self.write(&format!(".{}", attr));
+    }
+
     fn visit_filter(&mut self, name: &str, val: &Expr) {
         self.write(&format!("askama::filters::{}(&", name));
         self.visit_expr(val);
@@ -136,6 +141,7 @@ impl<'a> Generator<'a> {
             Expr::NumLit(s) => self.visit_num_lit(s),
             Expr::StrLit(s) => self.visit_str_lit(s),
             Expr::Var(s) => self.visit_var(s),
+            Expr::Attr(ref obj, name) => self.visit_attr(obj, name),
             Expr::Filter(name, ref val) => self.visit_filter(name, val),
             Expr::BinOp(op, ref left, ref right) =>
                 self.visit_binop(op, left, right),
diff --git a/askama/src/parser.rs b/askama/src/parser.rs
index 1d34611..b5583c3 100644
--- a/askama/src/parser.rs
+++ b/askama/src/parser.rs
@@ -6,6 +6,7 @@ pub enum Expr<'a> {
     NumLit(&'a str),
     StrLit(&'a str),
     Var(&'a str),
+    Attr(Box<Expr<'a>>, &'a str),
     Filter(&'a str, Box<Expr<'a>>),
     BinOp(&'a str, Box<Expr<'a>>, Box<Expr<'a>>),
 }
@@ -96,6 +97,15 @@ named!(expr_single<Expr>, alt!(
     expr_var
 ));
 
+named!(expr_attr<Expr>, alt!(
+    do_parse!(
+        obj: expr_single >>
+        tag_s!(".") >>
+        attr: alphanumeric >>
+        (Expr::Attr(Box::new(obj), str::from_utf8(attr).unwrap()))
+    ) | expr_single
+));
+
 named!(filter, do_parse!(
     tag_s!("|") >>
     fname: alphanumeric >>
@@ -103,7 +113,7 @@ named!(filter, do_parse!(
 ));
 
 named!(expr_filtered<Expr>, do_parse!(
-    obj: expr_single >>
+    obj: expr_attr >>
     filters: many0!(filter) >>
     ({
        let mut res = obj;
-- 
cgit