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-rw-r--r--askama_derive/src/parser/node.rs674
1 files changed, 0 insertions, 674 deletions
diff --git a/askama_derive/src/parser/node.rs b/askama_derive/src/parser/node.rs
deleted file mode 100644
index ce303bc..0000000
--- a/askama_derive/src/parser/node.rs
+++ /dev/null
@@ -1,674 +0,0 @@
-use std::str;
-
-use nom::branch::alt;
-use nom::bytes::complete::{tag, take_until};
-use nom::character::complete::char;
-use nom::combinator::{complete, consumed, cut, map, opt, peek, value};
-use nom::error::{Error, ErrorKind};
-use nom::multi::{fold_many0, many0, many1, separated_list0, separated_list1};
-use nom::sequence::{delimited, pair, preceded, terminated, tuple};
-use nom::{error_position, IResult};
-
-use super::{
- bool_lit, char_lit, identifier, keyword, num_lit, path, skip_till, split_ws_parts, str_lit,
- tag_block_end, tag_block_start, tag_comment_end, tag_comment_start, tag_expr_end,
- tag_expr_start, take_content, ws, Expr, State,
-};
-
-#[derive(Debug, PartialEq)]
-pub(crate) enum Node<'a> {
- Lit(&'a str, &'a str, &'a str),
- Comment(Ws),
- Expr(Ws, Expr<'a>),
- Call(Ws, Option<&'a str>, &'a str, Vec<Expr<'a>>),
- LetDecl(Ws, Target<'a>),
- Let(Ws, Target<'a>, Expr<'a>),
- Cond(Vec<Cond<'a>>, Ws),
- Match(Ws, Expr<'a>, Vec<When<'a>>, Ws),
- Loop(Loop<'a>),
- Extends(&'a str),
- BlockDef(Ws, &'a str, Vec<Node<'a>>, Ws),
- Include(Ws, &'a str),
- Import(Ws, &'a str, &'a str),
- Macro(&'a str, Macro<'a>),
- Raw(Ws, &'a str, &'a str, &'a str, Ws),
- Break(Ws),
- Continue(Ws),
-}
-
-#[derive(Debug, PartialEq)]
-pub(crate) enum Target<'a> {
- Name(&'a str),
- Tuple(Vec<&'a str>, Vec<Target<'a>>),
- Struct(Vec<&'a str>, Vec<(&'a str, Target<'a>)>),
- NumLit(&'a str),
- StrLit(&'a str),
- CharLit(&'a str),
- BoolLit(&'a str),
- Path(Vec<&'a str>),
-}
-
-#[derive(Clone, Copy, Debug, PartialEq)]
-pub(crate) enum Whitespace {
- Preserve,
- Suppress,
- Minimize,
-}
-
-#[derive(Debug, PartialEq)]
-pub(crate) struct Loop<'a> {
- pub(crate) ws1: Ws,
- pub(crate) var: Target<'a>,
- pub(crate) iter: Expr<'a>,
- pub(crate) cond: Option<Expr<'a>>,
- pub(crate) body: Vec<Node<'a>>,
- pub(crate) ws2: Ws,
- pub(crate) else_block: Vec<Node<'a>>,
- pub(crate) ws3: Ws,
-}
-
-pub(crate) type When<'a> = (Ws, Target<'a>, Vec<Node<'a>>);
-
-#[derive(Debug, PartialEq)]
-pub(crate) struct Macro<'a> {
- pub(crate) ws1: Ws,
- pub(crate) args: Vec<&'a str>,
- pub(crate) nodes: Vec<Node<'a>>,
- pub(crate) ws2: Ws,
-}
-
-/// First field is "minus/plus sign was used on the left part of the item".
-///
-/// Second field is "minus/plus sign was used on the right part of the item".
-#[derive(Clone, Copy, Debug, PartialEq)]
-pub(crate) struct Ws(pub(crate) Option<Whitespace>, pub(crate) Option<Whitespace>);
-
-pub(crate) type Cond<'a> = (Ws, Option<CondTest<'a>>, Vec<Node<'a>>);
-
-#[derive(Debug, PartialEq)]
-pub(crate) struct CondTest<'a> {
- pub(crate) target: Option<Target<'a>>,
- pub(crate) expr: Expr<'a>,
-}
-
-impl Node<'_> {
- pub(super) fn parse<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Vec<Node<'a>>> {
- parse_template(i, s)
- }
-}
-
-impl Target<'_> {
- pub(super) fn parse(i: &str) -> IResult<&str, Target<'_>> {
- target(i)
- }
-}
-
-fn expr_handle_ws(i: &str) -> IResult<&str, Whitespace> {
- alt((char('-'), char('+'), char('~')))(i).map(|(s, r)| (s, Whitespace::from(r)))
-}
-
-fn parameters(i: &str) -> IResult<&str, Vec<&str>> {
- delimited(
- ws(char('(')),
- separated_list0(char(','), ws(identifier)),
- ws(char(')')),
- )(i)
-}
-
-fn block_call(i: &str) -> IResult<&str, Node<'_>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("call")),
- cut(tuple((
- opt(tuple((ws(identifier), ws(tag("::"))))),
- ws(identifier),
- opt(ws(Expr::parse_arguments)),
- opt(expr_handle_ws),
- ))),
- ));
- let (i, (pws, _, (scope, name, args, nws))) = p(i)?;
- let scope = scope.map(|(scope, _)| scope);
- let args = args.unwrap_or_default();
- Ok((i, Node::Call(Ws(pws, nws), scope, name, args)))
-}
-
-fn cond_if(i: &str) -> IResult<&str, CondTest<'_>> {
- let mut p = preceded(
- ws(keyword("if")),
- cut(tuple((
- opt(delimited(
- ws(alt((keyword("let"), keyword("set")))),
- ws(Target::parse),
- ws(char('=')),
- )),
- ws(Expr::parse),
- ))),
- );
- let (i, (target, expr)) = p(i)?;
- Ok((i, CondTest { target, expr }))
-}
-
-fn cond_block<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Cond<'a>> {
- let mut p = tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- ws(keyword("else")),
- cut(tuple((
- opt(cond_if),
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- cut(|i| parse_template(i, s)),
- ))),
- ));
- let (i, (_, pws, _, (cond, nws, _, block))) = p(i)?;
- Ok((i, (Ws(pws, nws), cond, block)))
-}
-
-fn block_if<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- cond_if,
- cut(tuple((
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- cut(tuple((
- |i| parse_template(i, s),
- many0(|i| cond_block(i, s)),
- cut(tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- ws(keyword("endif")),
- opt(expr_handle_ws),
- ))),
- ))),
- ))),
- ));
- let (i, (pws1, cond, (nws1, _, (block, elifs, (_, pws2, _, nws2))))) = p(i)?;
-
- let mut res = vec![(Ws(pws1, nws1), Some(cond), block)];
- res.extend(elifs);
- Ok((i, Node::Cond(res, Ws(pws2, nws2))))
-}
-
-fn match_else_block<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, When<'a>> {
- let mut p = tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- ws(keyword("else")),
- cut(tuple((
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- cut(|i| parse_template(i, s)),
- ))),
- ));
- let (i, (_, pws, _, (nws, _, block))) = p(i)?;
- Ok((i, (Ws(pws, nws), Target::Name("_"), block)))
-}
-
-fn when_block<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, When<'a>> {
- let mut p = tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- ws(keyword("when")),
- cut(tuple((
- ws(Target::parse),
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- cut(|i| parse_template(i, s)),
- ))),
- ));
- let (i, (_, pws, _, (target, nws, _, block))) = p(i)?;
- Ok((i, (Ws(pws, nws), target, block)))
-}
-
-fn block_match<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("match")),
- cut(tuple((
- ws(Expr::parse),
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- cut(tuple((
- ws(many0(ws(value((), |i| block_comment(i, s))))),
- many1(|i| when_block(i, s)),
- cut(tuple((
- opt(|i| match_else_block(i, s)),
- cut(tuple((
- ws(|i| tag_block_start(i, s)),
- opt(expr_handle_ws),
- ws(keyword("endmatch")),
- opt(expr_handle_ws),
- ))),
- ))),
- ))),
- ))),
- ));
- let (i, (pws1, _, (expr, nws1, _, (_, arms, (else_arm, (_, pws2, _, nws2)))))) = p(i)?;
-
- let mut arms = arms;
- if let Some(arm) = else_arm {
- arms.push(arm);
- }
-
- Ok((i, Node::Match(Ws(pws1, nws1), expr, arms, Ws(pws2, nws2))))
-}
-
-fn block_let(i: &str) -> IResult<&str, Node<'_>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(alt((keyword("let"), keyword("set")))),
- cut(tuple((
- ws(Target::parse),
- opt(tuple((ws(char('=')), ws(Expr::parse)))),
- opt(expr_handle_ws),
- ))),
- ));
- let (i, (pws, _, (var, val, nws))) = p(i)?;
-
- Ok((
- i,
- if let Some((_, val)) = val {
- Node::Let(Ws(pws, nws), var, val)
- } else {
- Node::LetDecl(Ws(pws, nws), var)
- },
- ))
-}
-
-fn parse_loop_content<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Vec<Node<'a>>> {
- s.enter_loop();
- let result = parse_template(i, s);
- s.leave_loop();
- result
-}
-
-fn block_for<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let if_cond = preceded(ws(keyword("if")), cut(ws(Expr::parse)));
- let else_block = |i| {
- let mut p = preceded(
- ws(keyword("else")),
- cut(tuple((
- opt(expr_handle_ws),
- delimited(
- |i| tag_block_end(i, s),
- |i| parse_template(i, s),
- |i| tag_block_start(i, s),
- ),
- opt(expr_handle_ws),
- ))),
- );
- let (i, (pws, nodes, nws)) = p(i)?;
- Ok((i, (pws, nodes, nws)))
- };
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("for")),
- cut(tuple((
- ws(Target::parse),
- ws(keyword("in")),
- cut(tuple((
- ws(Expr::parse),
- opt(if_cond),
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- cut(tuple((
- |i| parse_loop_content(i, s),
- cut(tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- opt(else_block),
- ws(keyword("endfor")),
- opt(expr_handle_ws),
- ))),
- ))),
- ))),
- ))),
- ));
- let (i, (pws1, _, (var, _, (iter, cond, nws1, _, (body, (_, pws2, else_block, _, nws2)))))) =
- p(i)?;
- let (nws3, else_block, pws3) = else_block.unwrap_or_default();
- Ok((
- i,
- Node::Loop(Loop {
- ws1: Ws(pws1, nws1),
- var,
- iter,
- cond,
- body,
- ws2: Ws(pws2, nws3),
- else_block,
- ws3: Ws(pws3, nws2),
- }),
- ))
-}
-
-fn block_extends(i: &str) -> IResult<&str, Node<'_>> {
- let (i, (_, name)) = tuple((ws(keyword("extends")), ws(str_lit)))(i)?;
- Ok((i, Node::Extends(name)))
-}
-
-fn block_block<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut start = tuple((
- opt(expr_handle_ws),
- ws(keyword("block")),
- cut(tuple((ws(identifier), opt(expr_handle_ws), |i| {
- tag_block_end(i, s)
- }))),
- ));
- let (i, (pws1, _, (name, nws1, _))) = start(i)?;
-
- let mut end = cut(tuple((
- |i| parse_template(i, s),
- cut(tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- ws(keyword("endblock")),
- cut(tuple((opt(ws(keyword(name))), opt(expr_handle_ws)))),
- ))),
- )));
- let (i, (contents, (_, pws2, _, (_, nws2)))) = end(i)?;
-
- Ok((
- i,
- Node::BlockDef(Ws(pws1, nws1), name, contents, Ws(pws2, nws2)),
- ))
-}
-
-fn block_include(i: &str) -> IResult<&str, Node<'_>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("include")),
- cut(pair(ws(str_lit), opt(expr_handle_ws))),
- ));
- let (i, (pws, _, (name, nws))) = p(i)?;
- Ok((i, Node::Include(Ws(pws, nws), name)))
-}
-
-fn block_import(i: &str) -> IResult<&str, Node<'_>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("import")),
- cut(tuple((
- ws(str_lit),
- ws(keyword("as")),
- cut(pair(ws(identifier), opt(expr_handle_ws))),
- ))),
- ));
- let (i, (pws, _, (name, _, (scope, nws)))) = p(i)?;
- Ok((i, Node::Import(Ws(pws, nws), name, scope)))
-}
-
-fn block_macro<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut start = tuple((
- opt(expr_handle_ws),
- ws(keyword("macro")),
- cut(tuple((
- ws(identifier),
- opt(ws(parameters)),
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- ))),
- ));
- let (i, (pws1, _, (name, params, nws1, _))) = start(i)?;
-
- let mut end = cut(tuple((
- |i| parse_template(i, s),
- cut(tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- ws(keyword("endmacro")),
- cut(tuple((opt(ws(keyword(name))), opt(expr_handle_ws)))),
- ))),
- )));
- let (i, (contents, (_, pws2, _, (_, nws2)))) = end(i)?;
-
- assert_ne!(name, "super", "invalid macro name 'super'");
-
- let params = params.unwrap_or_default();
-
- Ok((
- i,
- Node::Macro(
- name,
- Macro {
- ws1: Ws(pws1, nws1),
- args: params,
- nodes: contents,
- ws2: Ws(pws2, nws2),
- },
- ),
- ))
-}
-
-fn block_raw<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let endraw = tuple((
- |i| tag_block_start(i, s),
- opt(expr_handle_ws),
- ws(keyword("endraw")),
- opt(expr_handle_ws),
- peek(|i| tag_block_end(i, s)),
- ));
-
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("raw")),
- cut(tuple((
- opt(expr_handle_ws),
- |i| tag_block_end(i, s),
- consumed(skip_till(endraw)),
- ))),
- ));
-
- let (_, (pws1, _, (nws1, _, (contents, (i, (_, pws2, _, nws2, _)))))) = p(i)?;
- let (lws, val, rws) = match split_ws_parts(contents) {
- Node::Lit(lws, val, rws) => (lws, val, rws),
- _ => unreachable!(),
- };
- let ws1 = Ws(pws1, nws1);
- let ws2 = Ws(pws2, nws2);
- Ok((i, Node::Raw(ws1, lws, val, rws, ws2)))
-}
-
-fn break_statement<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("break")),
- opt(expr_handle_ws),
- ));
- let (j, (pws, _, nws)) = p(i)?;
- if !s.is_in_loop() {
- return Err(nom::Err::Failure(error_position!(i, ErrorKind::Tag)));
- }
- Ok((j, Node::Break(Ws(pws, nws))))
-}
-
-fn continue_statement<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut p = tuple((
- opt(expr_handle_ws),
- ws(keyword("continue")),
- opt(expr_handle_ws),
- ));
- let (j, (pws, _, nws)) = p(i)?;
- if !s.is_in_loop() {
- return Err(nom::Err::Failure(error_position!(i, ErrorKind::Tag)));
- }
- Ok((j, Node::Continue(Ws(pws, nws))))
-}
-
-fn block_node<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut p = tuple((
- |i| tag_block_start(i, s),
- alt((
- block_call,
- block_let,
- |i| block_if(i, s),
- |i| block_for(i, s),
- |i| block_match(i, s),
- block_extends,
- block_include,
- block_import,
- |i| block_block(i, s),
- |i| block_macro(i, s),
- |i| block_raw(i, s),
- |i| break_statement(i, s),
- |i| continue_statement(i, s),
- )),
- cut(|i| tag_block_end(i, s)),
- ));
- let (i, (_, contents, _)) = p(i)?;
- Ok((i, contents))
-}
-
-fn block_comment_body<'a>(mut i: &'a str, s: &State<'_>) -> IResult<&'a str, &'a str> {
- let mut level = 0;
- loop {
- let (end, tail) = take_until(s.syntax.comment_end)(i)?;
- match take_until::<_, _, Error<_>>(s.syntax.comment_start)(i) {
- Ok((start, _)) if start.as_ptr() < end.as_ptr() => {
- level += 1;
- i = &start[2..];
- }
- _ if level > 0 => {
- level -= 1;
- i = &end[2..];
- }
- _ => return Ok((end, tail)),
- }
- }
-}
-
-fn block_comment<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut p = tuple((
- |i| tag_comment_start(i, s),
- cut(tuple((
- opt(expr_handle_ws),
- |i| block_comment_body(i, s),
- |i| tag_comment_end(i, s),
- ))),
- ));
- let (i, (_, (pws, tail, _))) = p(i)?;
- let nws = if tail.ends_with('-') {
- Some(Whitespace::Suppress)
- } else if tail.ends_with('+') {
- Some(Whitespace::Preserve)
- } else if tail.ends_with('~') {
- Some(Whitespace::Minimize)
- } else {
- None
- };
- Ok((i, Node::Comment(Ws(pws, nws))))
-}
-
-fn expr_node<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Node<'a>> {
- let mut p = tuple((
- |i| tag_expr_start(i, s),
- cut(tuple((
- opt(expr_handle_ws),
- ws(Expr::parse),
- opt(expr_handle_ws),
- |i| tag_expr_end(i, s),
- ))),
- ));
- let (i, (_, (pws, expr, nws, _))) = p(i)?;
- Ok((i, Node::Expr(Ws(pws, nws), expr)))
-}
-
-fn parse_template<'a>(i: &'a str, s: &State<'_>) -> IResult<&'a str, Vec<Node<'a>>> {
- many0(alt((
- complete(|i| take_content(i, s)),
- complete(|i| block_comment(i, s)),
- complete(|i| expr_node(i, s)),
- complete(|i| block_node(i, s)),
- )))(i)
-}
-
-fn variant_lit(i: &str) -> IResult<&str, Target<'_>> {
- alt((
- map(str_lit, Target::StrLit),
- map(char_lit, Target::CharLit),
- map(num_lit, Target::NumLit),
- map(bool_lit, Target::BoolLit),
- ))(i)
-}
-
-fn target(i: &str) -> IResult<&str, Target<'_>> {
- let mut opt_opening_paren = map(opt(ws(char('('))), |o| o.is_some());
- let mut opt_closing_paren = map(opt(ws(char(')'))), |o| o.is_some());
- let mut opt_opening_brace = map(opt(ws(char('{'))), |o| o.is_some());
-
- let (i, lit) = opt(variant_lit)(i)?;
- if let Some(lit) = lit {
- return Ok((i, lit));
- }
-
- // match tuples and unused parentheses
- let (i, target_is_tuple) = opt_opening_paren(i)?;
- if target_is_tuple {
- let (i, is_empty_tuple) = opt_closing_paren(i)?;
- if is_empty_tuple {
- return Ok((i, Target::Tuple(Vec::new(), Vec::new())));
- }
-
- let (i, first_target) = target(i)?;
- let (i, is_unused_paren) = opt_closing_paren(i)?;
- if is_unused_paren {
- return Ok((i, first_target));
- }
-
- let mut targets = vec![first_target];
- let (i, _) = cut(tuple((
- fold_many0(
- preceded(ws(char(',')), target),
- || (),
- |_, target| {
- targets.push(target);
- },
- ),
- opt(ws(char(','))),
- ws(cut(char(')'))),
- )))(i)?;
- return Ok((i, Target::Tuple(Vec::new(), targets)));
- }
-
- // match structs
- let (i, path) = opt(path)(i)?;
- if let Some(path) = path {
- let i_before_matching_with = i;
- let (i, _) = opt(ws(keyword("with")))(i)?;
-
- let (i, is_unnamed_struct) = opt_opening_paren(i)?;
- if is_unnamed_struct {
- let (i, targets) = alt((
- map(char(')'), |_| Vec::new()),
- terminated(
- cut(separated_list1(ws(char(',')), target)),
- pair(opt(ws(char(','))), ws(cut(char(')')))),
- ),
- ))(i)?;
- return Ok((i, Target::Tuple(path, targets)));
- }
-
- let (i, is_named_struct) = opt_opening_brace(i)?;
- if is_named_struct {
- let (i, targets) = alt((
- map(char('}'), |_| Vec::new()),
- terminated(
- cut(separated_list1(ws(char(',')), named_target)),
- pair(opt(ws(char(','))), ws(cut(char('}')))),
- ),
- ))(i)?;
- return Ok((i, Target::Struct(path, targets)));
- }
-
- return Ok((i_before_matching_with, Target::Path(path)));
- }
-
- // neither literal nor struct nor path
- map(identifier, Target::Name)(i)
-}
-
-fn named_target(i: &str) -> IResult<&str, (&str, Target<'_>)> {
- let (i, (src, target)) = pair(identifier, opt(preceded(ws(char(':')), target)))(i)?;
- Ok((i, (src, target.unwrap_or(Target::Name(src)))))
-}
generated by cgit (git 2.34.1) at 2024-11-22 05:18:06 +0000