diff options
Diffstat (limited to 'askama_codegen/src/lib.rs')
-rw-r--r-- | askama_codegen/src/lib.rs | 37 |
1 files changed, 6 insertions, 31 deletions
diff --git a/askama_codegen/src/lib.rs b/askama_codegen/src/lib.rs index 1e7fe71..72e51ba 100644 --- a/askama_codegen/src/lib.rs +++ b/askama_codegen/src/lib.rs @@ -7,7 +7,8 @@ extern crate proc_macro; extern crate quote; extern crate syn; -use nom::IResult; +mod parser; + use proc_macro::TokenStream; use std::fs::File; use std::io::Read; @@ -53,28 +54,6 @@ fn get_template_source(tpl_file: &str) -> String { s } -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))); - #[proc_macro_derive(Template, attributes(template))] pub fn derive_template(input: TokenStream) -> TokenStream { let source = input.to_string(); @@ -88,11 +67,7 @@ pub fn derive_template(input: TokenStream) -> TokenStream { let name = &ast.ident; let path = get_path_from_attrs(&ast.attrs); let src = get_template_source(&path); - - let root = match parse_template(src.as_bytes()) { - IResult::Done(_, res) => res, - _ => panic!("problems parsing template source"), - }; + let tokens = parser::parse(&src); let mut code = String::new(); code.push_str("impl askama::Template for "); @@ -101,13 +76,13 @@ pub fn derive_template(input: TokenStream) -> TokenStream { code.push_str(" fn render(&self) -> String {\n"); code.push_str(" let mut buf = String::new();\n"); code.push_str(" buf.push_str(\""); - code.push_str(str::from_utf8(root[0]).unwrap()); + code.push_str(str::from_utf8(tokens[0]).unwrap()); code.push_str("\");\n"); code.push_str(" buf.push_str(&self."); - code.push_str(str::from_utf8(root[1]).unwrap()); + code.push_str(str::from_utf8(tokens[1]).unwrap()); code.push_str(");\n"); code.push_str(" buf.push_str(\""); - code.push_str(str::from_utf8(root[2]).unwrap()); + code.push_str(str::from_utf8(tokens[2]).unwrap()); code.push_str("\");\n"); code.push_str(" buf"); code.push_str(" }\n"); |