diff options
Diffstat (limited to '')
| -rw-r--r-- | askama_parser/src/node.rs | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/askama_parser/src/node.rs b/askama_parser/src/node.rs index d11895b..27d4adc 100644 --- a/askama_parser/src/node.rs +++ b/askama_parser/src/node.rs @@ -224,7 +224,8 @@ impl<'a> Target<'a> { } // neither literal nor struct nor path - map(identifier, Self::Name)(i) + let (new_i, name) = identifier(i)?; + Ok((new_i, Self::verify_name(i, name)?)) } fn lit(i: &'a str) -> ParseResult<'a, Self> { @@ -236,9 +237,24 @@ impl<'a> Target<'a> { ))(i) } - fn named(i: &'a str) -> ParseResult<'a, (&str, Self)> { - let (i, (src, target)) = pair(identifier, opt(preceded(ws(char(':')), Self::parse)))(i)?; - Ok((i, (src, target.unwrap_or(Self::Name(src))))) + fn named(init_i: &'a str) -> ParseResult<'a, (&str, Self)> { + let (i, (src, target)) = + pair(identifier, opt(preceded(ws(char(':')), Self::parse)))(init_i)?; + let target = match target { + Some(target) => target, + None => Self::verify_name(init_i, src)?, + }; + Ok((i, (src, target))) + } + + fn verify_name(input: &'a str, name: &'a str) -> Result<Self, nom::Err<ErrorContext<'a>>> { + match name { + "self" | "writer" => Err(nom::Err::Failure(ErrorContext { + input, + message: Some(Cow::Owned(format!("Cannot use `{name}` as a name"))), + })), + _ => Ok(Self::Name(name)), + } } } |