Move template parser into separate module

1 files changed, 30 insertions, 0 deletions

diff --git a/askama_codegen/src/parser.rs b/askama_codegen/src/parser.rs
new file mode 100644
index 0000000..6ff4388
--- /dev/null
+++ b/askama_codegen/src/parser.rs
@@ -0,0 +1,30 @@
+use nom::{self, IResult};
+
+fn take_content(i: &[u8]) -> IResult<&[u8], &[u8]> {
+    if i.len() < 1 || i[0] == b'{' {
+        return IResult::Error(error_position!(nom::ErrorKind::TakeUntil, i));
+    }
+    for (j, c) in i.iter().enumerate() {
+        if *c == b'{' {
+            if i.len() < j + 2 {
+                return IResult::Done(&i[..0], &i[..]);
+            } else if i[j + 1] == '{' as u8 {
+                return IResult::Done(&i[j..], &i[..j]);
+            } else if i[j + 1] == '%' as u8 {
+                return IResult::Done(&i[j..], &i[..j]);
+            }
+        }
+    }
+    IResult::Done(&i[..0], &i[..])
+}
+
+named!(var_expr, delimited!(tag!("{{"), take_until!("}}"), tag!("}}")));
+
+named!(parse_template< Vec<&[u8]> >, many1!(alt!(take_content | var_expr)));
+
+pub fn parse<'a>(src: &'a str) -> Vec<&'a [u8]> {
+    match parse_template(src.as_bytes()) {
+        IResult::Done(_, res) => res,
+        _ => panic!("problems parsing template source"),
+    }
+}