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-rw-r--r--askama_derive/src/parser.rs1250
1 files changed, 709 insertions, 541 deletions
diff --git a/askama_derive/src/parser.rs b/askama_derive/src/parser.rs
index 1045090..d22ac5a 100644
--- a/askama_derive/src/parser.rs
+++ b/askama_derive/src/parser.rs
@@ -1,7 +1,11 @@
-// rustfmt doesn't do a very good job on nom parser invocations.
-#![cfg_attr(rustfmt, rustfmt_skip)]
-
-use nom;
+use nom::branch::alt;
+use nom::bytes::complete::{is_not, tag, take_until};
+use nom::character::complete::{char, digit1};
+use nom::combinator::{complete, map, opt};
+use nom::error::ParseError;
+use nom::multi::{many0, many1, separated_list, separated_nonempty_list};
+use nom::sequence::{delimited, pair, tuple};
+use nom::{self, Compare, IResult, InputTake};
use std::str;
use askama_shared::Syntax;
@@ -96,11 +100,30 @@ impl<'a> Default for MatchParameters<'a> {
}
}
+fn ws<F, I, O, E>(inner: F) -> impl Fn(I) -> IResult<I, O, E>
+where
+ F: Fn(I) -> IResult<I, O, E>,
+ I: InputTake + Clone + PartialEq + for<'a> Compare<&'a [u8; 1]>,
+ E: ParseError<I>,
+{
+ move |i: I| {
+ let i = alt::<_, _, (), _>((tag(b" "), tag(b"\t")))(i.clone())
+ .map(|(i, _)| i)
+ .unwrap_or(i);
+ let (i, res) = inner(i)?;
+ let i = alt::<_, _, (), _>((tag(b" "), tag(b"\t")))(i.clone())
+ .map(|(i, _)| i)
+ .unwrap_or(i);
+ Ok((i, res))
+ }
+}
+
fn split_ws_parts(s: &[u8]) -> Node {
if s.is_empty() {
- let rs = str::from_utf8(&s).unwrap();
+ let rs = str::from_utf8(s).unwrap();
return Node::Lit(rs, rs, rs);
}
+
let is_ws = |c: &u8| *c != b' ' && *c != b'\t' && *c != b'\r' && *c != b'\n';
let start = s.iter().position(&is_ws);
let res = if start.is_none() {
@@ -115,6 +138,7 @@ fn split_ws_parts(s: &[u8]) -> Node {
(&s[..start], &s[start..=end], &s[end + 1..])
}
};
+
Node::Lit(
str::from_utf8(res.0).unwrap(),
str::from_utf8(res.1).unwrap(),
@@ -197,106 +221,103 @@ fn non_ascii(chr: u8) -> bool {
chr >= 0x80 && chr <= 0xFD
}
-named!(expr_bool_lit<&[u8], Expr>, map!(
- alt!(tag!("true") | tag!("false")),
- |s| Expr::BoolLit(str::from_utf8(&s).unwrap())
-));
+fn expr_bool_lit(i: &[u8]) -> IResult<&[u8], Expr> {
+ map(alt((tag("false"), tag("true"))), |s| {
+ Expr::BoolLit(str::from_utf8(s).unwrap())
+ })(i)
+}
-named!(num_lit<&[u8], &str>, map!(nom::character::complete::digit1,
- |s| str::from_utf8(s).unwrap()
-));
+fn num_lit(i: &[u8]) -> IResult<&[u8], &str> {
+ map(digit1, |s| str::from_utf8(s).unwrap())(i)
+}
-named!(expr_num_lit<&[u8], Expr>, map!(num_lit,
- |s| Expr::NumLit(s)
-));
+fn expr_num_lit(i: &[u8]) -> IResult<&[u8], Expr> {
+ map(num_lit, |s| Expr::NumLit(s))(i)
+}
-named!(expr_array_lit<&[u8], Expr>,
- delimited!(
- ws!(tag!("[")),
- map!(separated_nonempty_list!(
- ws!(tag!(",")),
- expr_any
- ), |arr| Expr::Array(arr)),
- ws!(tag!("]"))
- )
-);
+fn expr_array_lit(i: &[u8]) -> IResult<&[u8], Expr> {
+ delimited(
+ ws(tag("[")),
+ map(separated_nonempty_list(ws(tag(",")), expr_any), |arr| {
+ Expr::Array(arr)
+ }),
+ ws(tag("]")),
+ )(i)
+}
-named!(variant_num_lit<&[u8], MatchVariant>, map!(num_lit,
- |s| MatchVariant::NumLit(s)
-));
+fn variant_num_lit(i: &[u8]) -> IResult<&[u8], MatchVariant> {
+ map(num_lit, |s| MatchVariant::NumLit(s))(i)
+}
-named!(param_num_lit<&[u8], MatchParameter>, map!(num_lit,
- |s| MatchParameter::NumLit(s)
-));
+fn param_num_lit(i: &[u8]) -> IResult<&[u8], MatchParameter> {
+ map(num_lit, |s| MatchParameter::NumLit(s))(i)
+}
-named!(expr_str_lit<&[u8], Expr>, map!(
- delimited!(char!('"'), take_until!("\""), char!('"')),
- |s| Expr::StrLit(str::from_utf8(&s).unwrap())
-));
+fn expr_str_lit(i: &[u8]) -> IResult<&[u8], Expr> {
+ map(delimited(char('"'), take_until("\""), char('"')), |s| {
+ Expr::StrLit(str::from_utf8(s).unwrap())
+ })(i)
+}
-named!(variant_str_lit<&[u8], MatchVariant>, map!(
- delimited!(char!('"'), is_not!("\""), char!('"')),
- |s| MatchVariant::StrLit(str::from_utf8(&s).unwrap())
-));
+fn variant_str_lit(i: &[u8]) -> IResult<&[u8], MatchVariant> {
+ map(delimited(char('"'), is_not("\""), char('"')), |s| {
+ MatchVariant::StrLit(str::from_utf8(s).unwrap())
+ })(i)
+}
-named!(param_str_lit<&[u8], MatchParameter>, map!(
- delimited!(char!('"'), is_not!("\""), char!('"')),
- |s| MatchParameter::StrLit(str::from_utf8(&s).unwrap())
-));
+fn param_str_lit(i: &[u8]) -> IResult<&[u8], MatchParameter> {
+ map(delimited(char('"'), is_not("\""), char('"')), |s| {
+ MatchParameter::StrLit(str::from_utf8(s).unwrap())
+ })(i)
+}
-named!(expr_var<&[u8], Expr>, map!(identifier,
- |s| Expr::Var(s))
-);
+fn expr_var(i: &[u8]) -> IResult<&[u8], Expr> {
+ map(identifier, |s| Expr::Var(s))(i)
+}
-named!(expr_path<&[u8], Expr>, do_parse!(
- start: call!(identifier) >>
- tag!("::") >>
- rest: separated_nonempty_list!(tag!("::"), identifier) >>
- ({
- let mut path = vec![start];
- path.extend(rest);
- Expr::Path(path)
- })
-));
-
-named!(variant_path<&[u8], MatchVariant>,
- map!(
- separated_nonempty_list!(tag!("::"), identifier),
- |path| MatchVariant::Path(path)
- )
-);
+fn expr_path(i: &[u8]) -> IResult<&[u8], Expr> {
+ let tail = separated_nonempty_list(tag("::"), identifier);
+ let (i, (start, _, rest)) = tuple((identifier, tag("::"), tail))(i)?;
-named!(target_single<&[u8], Target>, map!(identifier,
- |s| Target::Name(s)
-));
-
-named!(target_tuple<&[u8], Target>, delimited!(
- tag!("("),
- do_parse!(
- res: separated_list!(tag!(","), ws!(identifier)) >>
- opt!(ws!(tag!(","))) >>
- (Target::Tuple(res))
- ),
- tag!(")")
-));
-
-named!(variant_name<&[u8], MatchVariant>, map!(identifier,
- |s| MatchVariant::Name(s)
-));
-
-named!(param_name<&[u8], MatchParameter>, map!(identifier,
- |s| MatchParameter::Name(s)
-));
-
-named!(arguments<&[u8], Vec<Expr>>, delimited!(
- tag!("("),
- separated_list!(tag!(","), ws!(expr_any)),
- tag!(")")
-));
-
-named!(macro_arguments<&[u8], &str>,
- delimited!(char!('('), nested_parenthesis, char!(')'))
-);
+ let mut path = vec![start];
+ path.extend(rest);
+ Ok((i, Expr::Path(path)))
+}
+
+fn variant_path(i: &[u8]) -> IResult<&[u8], MatchVariant> {
+ map(separated_nonempty_list(tag("::"), identifier), |path| {
+ MatchVariant::Path(path)
+ })(i)
+}
+
+fn target_single(i: &[u8]) -> IResult<&[u8], Target> {
+ map(identifier, |s| Target::Name(s))(i)
+}
+
+fn target_tuple(i: &[u8]) -> IResult<&[u8], Target> {
+ let parts = separated_list(tag(","), ws(identifier));
+ let trailing = opt(ws(tag(",")));
+ let full = delimited(tag("("), tuple((parts, trailing)), tag(")"));
+
+ let (i, (elems, _)) = full(i)?;
+ Ok((i, Target::Tuple(elems)))
+}
+
+fn variant_name(i: &[u8]) -> IResult<&[u8], MatchVariant> {
+ map(identifier, |s| MatchVariant::Name(s))(i)
+}
+
+fn param_name(i: &[u8]) -> IResult<&[u8], MatchParameter> {
+ map(identifier, |s| MatchParameter::Name(s))(i)
+}
+
+fn arguments(i: &[u8]) -> IResult<&[u8], Vec<Expr>> {
+ delimited(tag("("), separated_list(tag(","), ws(expr_any)), tag(")"))(i)
+}
+
+fn macro_arguments(i: &[u8]) -> IResult<&[u8], &str> {
+ delimited(char('('), nested_parenthesis, char(')'))(i)
+}
fn nested_parenthesis(i: &[u8]) -> Result<(&[u8], &str), nom::Err<(&[u8], nom::error::ErrorKind)>> {
let mut nested = 0;
@@ -307,16 +328,14 @@ fn nested_parenthesis(i: &[u8]) -> Result<(&[u8], &str), nom::Err<(&[u8], nom::e
for (i, b) in i.iter().enumerate() {
if !(*b == b'(' || *b == b')') || !in_str {
match *b {
- b'(' => {
- nested += 1
- },
+ b'(' => nested += 1,
b')' => {
if nested == 0 {
last = i;
break;
}
nested -= 1;
- },
+ }
b'"' => {
if in_str {
if !escaped {
@@ -325,10 +344,10 @@ fn nested_parenthesis(i: &[u8]) -> Result<(&[u8], &str), nom::Err<(&[u8], nom::e
} else {
in_str = true;
}
- },
+ }
b'\\' => {
escaped = !escaped;
- },
+ }
_ => (),
}
}
@@ -348,160 +367,178 @@ fn nested_parenthesis(i: &[u8]) -> Result<(&[u8], &str), nom::Err<(&[u8], nom::e
}
}
-named!(parameters<&[u8], Vec<&str>>, delimited!(
- tag!("("),
- separated_list!(tag!(","), ws!(identifier)),
- tag!(")")
-));
-
-named!(with_parameters<&[u8], MatchParameters>, do_parse!(
- tag!("with") >>
- value: alt!(match_simple_parameters | match_named_parameters) >>
- (value)
-));
-
-named!(match_simple_parameters<&[u8], MatchParameters>, delimited!(
- ws!(tag!("(")),
- map!(separated_list!(tag!(","), ws!(match_parameter)), |mps| MatchParameters::Simple(mps)),
- tag!(")")
-));
-
-named!(match_named_parameters<&[u8], MatchParameters>, delimited!(
- ws!(tag!("{")),
- map!(separated_list!(tag!(","), ws!(match_named_parameter)), |mps| MatchParameters::Named(mps)),
- tag!("}")
-));
-
-named!(expr_group<&[u8], Expr>, map!(
- delimited!(char!('('), expr_any, char!(')')),
- |s| Expr::Group(Box::new(s))
-));
-
-named!(expr_single<&[u8], Expr>, alt!(
- expr_bool_lit |
- expr_num_lit |
- expr_str_lit |
- expr_path |
- expr_rust_macro |
- expr_array_lit |
- expr_var |
- expr_group
-));
-
-named!(match_variant<&[u8], MatchVariant>, alt!(
- variant_path |
- variant_name |
- variant_num_lit |
- variant_str_lit
-));
-
-named!(match_parameter<&[u8], MatchParameter>, alt!(
- param_name |
- param_num_lit |
- param_str_lit
-));
-
-named!(match_named_parameter<&[u8], (&str, Option<MatchParameter>)>, do_parse!(
- name: identifier >>
- param: opt!(do_parse!(
- ws!(tag!(":")) >>
- param: match_parameter >>
- (param)
- )) >>
- ((name, param))
-));
-
-named!(attr<&[u8], (&str, Option<Vec<Expr>>)>, do_parse!(
- tag!(".") >>
- attr: alt!(num_lit | identifier) >>
- args: opt!(arguments) >>
- (attr, args)
-));
-
-named!(expr_attr<&[u8], Expr>, do_parse!(
- obj: expr_single >>
- attrs: many0!(attr) >>
- ({
- let mut res = obj;
- for (aname, args) in attrs {
- res = if args.is_some() {
- Expr::MethodCall(Box::new(res), aname, args.unwrap())
- } else {
- Expr::Attr(Box::new(res), aname)
+fn parameters(i: &[u8]) -> IResult<&[u8], Vec<&str>> {
+ delimited(tag("("), separated_list(tag(","), ws(identifier)), tag(")"))(i)
+}
+
+fn with_parameters(i: &[u8]) -> IResult<&[u8], MatchParameters> {
+ let (i, (_, value)) = tuple((
+ tag("with"),
+ alt((match_simple_parameters, match_named_parameters)),
+ ))(i)?;
+ Ok((i, value))
+}
+
+fn match_simple_parameters(i: &[u8]) -> IResult<&[u8], MatchParameters> {
+ delimited(
+ ws(tag("(")),
+ map(separated_list(tag(","), ws(match_parameter)), |mps| {
+ MatchParameters::Simple(mps)
+ }),
+ tag(")"),
+ )(i)
+}
+
+fn match_named_parameters(i: &[u8]) -> IResult<&[u8], MatchParameters> {
+ delimited(
+ ws(tag("{")),
+ map(separated_list(tag(","), ws(match_named_parameter)), |mps| {
+ MatchParameters::Named(mps)
+ }),
+ tag("}"),
+ )(i)
+}
+
+fn expr_group(i: &[u8]) -> IResult<&[u8], Expr> {
+ map(delimited(char('('), expr_any, char(')')), |s| {
+ Expr::Group(Box::new(s))
+ })(i)
+}
+
+fn expr_single(i: &[u8]) -> IResult<&[u8], Expr> {
+ alt((
+ expr_bool_lit,
+ expr_num_lit,
+ expr_str_lit,
+ expr_path,
+ expr_rust_macro,
+ expr_array_lit,
+ expr_var,
+ expr_group,
+ ))(i)
+}
+
+fn match_variant(i: &[u8]) -> IResult<&[u8], MatchVariant> {
+ alt((variant_path, variant_name, variant_num_lit, variant_str_lit))(i)
+}
+
+fn match_parameter(i: &[u8]) -> IResult<&[u8], MatchParameter> {
+ alt((param_name, param_num_lit, param_str_lit))(i)
+}
+
+fn match_named_parameter(i: &[u8]) -> IResult<&[u8], (&str, Option<MatchParameter>)> {
+ let param = tuple((ws(tag(":")), match_parameter));
+ let (i, (name, param)) = tuple((identifier, opt(param)))(i)?;
+ Ok((i, (name, param.map(|s| s.1))))
+}
+
+fn attr(i: &[u8]) -> IResult<&[u8], (&str, Option<Vec<Expr>>)> {
+ let (i, (_, attr, args)) = tuple((tag("."), alt((num_lit, identifier)), opt(arguments)))(i)?;
+ Ok((i, (attr, args)))
+}
+
+fn expr_attr(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (obj, attrs)) = tuple((expr_single, many0(attr)))(i)?;
+
+ let mut res = obj;
+ for (aname, args) in attrs {
+ res = if args.is_some() {
+ Expr::MethodCall(Box::new(res), aname, args.unwrap())
+ } else {
+ Expr::Attr(Box::new(res), aname)
+ };
+ }
+
+ Ok((i, res))
+}
+
+fn expr_index(i: &[u8]) -> IResult<&[u8], Expr> {
+ let key = opt(tuple((ws(tag("[")), expr_any, ws(tag("]")))));
+ let (i, (obj, key)) = tuple((expr_attr, key))(i)?;
+ let key = key.map(|(_, key, _)| key);
+
+ Ok((
+ i,
+ match key {
+ Some(key) => Expr::Index(Box::new(obj), Box::new(key)),
+ None => obj,
+ },
+ ))
+}
+
+fn filter(i: &[u8]) -> IResult<&[u8], (&str, Option<Vec<Expr>>)> {
+ let (i, (_, fname, args)) = tuple((tag("|"), identifier, opt(arguments)))(i)?;
+ Ok((i, (fname, args)))
+}
+
+fn expr_filtered(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (obj, filters)) = tuple((expr_index, many0(filter)))(i)?;
+
+ let mut res = obj;
+ for (fname, args) in filters {
+ res = Expr::Filter(fname, {
+ let mut args = match args {
+ Some(inner) => inner,
+ None => Vec::new(),
};
- }
- res
- })
-));
-
-named!(expr_index<&[u8], Expr>, do_parse!(
- obj: expr_attr >>
- key: opt!(do_parse!(
- ws!(tag!("[")) >>
- key: expr_any >>
- ws!(tag!("]")) >>
- (key)
- )) >>
- (match key {
- Some(key) => Expr::Index(Box::new(obj), Box::new(key)),
- None => obj,
- })
-));
-
-named!(filter<&[u8], (&str, Option<Vec<Expr>>)>, do_parse!(
- tag!("|") >>
- fname: identifier >>
- args: opt!(arguments) >>
- (fname, args)
-));
-
-named!(expr_filtered<&[u8], Expr>, do_parse!(
- obj: expr_index >>
- filters: many0!(filter) >>
- ({
- let mut res = obj;
- for (fname, args) in filters {
- res = Expr::Filter(fname, {
- let mut args = match args {
- Some(inner) => inner,
- None => Vec::new(),
- };
- args.insert(0, res);
- args
- });
- }
- res
- })
-));
-
-named!(expr_unary<&[u8], Expr>, do_parse!(
- op: opt!(alt!(tag!("!") | tag!("-"))) >>
- expr: expr_filtered >>
- (match op {
- Some(op) => Expr::Unary(str::from_utf8(op).unwrap(), Box::new(expr)),
- None => expr,
- })
-));
-
-named!(expr_rust_macro<&[u8], Expr>, do_parse!(
- mname: identifier >>
- tag!("!") >>
- args: macro_arguments >>
- (Expr::RustMacro(mname, args))
-));
+ args.insert(0, res);
+ args
+ });
+ }
+
+ Ok((i, res))
+}
+
+fn expr_unary(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (op, expr)) = tuple((opt(alt((tag("!"), tag("-")))), expr_filtered))(i)?;
+ Ok((
+ i,
+ match op {
+ Some(op) => Expr::Unary(str::from_utf8(op).unwrap(), Box::new(expr)),
+ None => expr,
+ },
+ ))
+}
+
+fn expr_rust_macro(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (mname, _, args)) = tuple((identifier, tag("!"), macro_arguments))(i)?;
+ Ok((i, Expr::RustMacro(mname, args)))
+}
macro_rules! expr_prec_layer {
- ( $name:ident, $inner:ident, $( $op:expr ),* ) => {
- named!($name<&[u8], Expr>, do_parse!(
- left: $inner >>
- op_and_right: opt!(pair!(ws!(alt!($( tag!($op) )|*)), expr_any)) >>
- (match op_and_right {
+ ( $name:ident, $inner:ident, $op:expr ) => {
+ fn $name(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (left, op_and_right)) = tuple((
+ $inner,
+ opt(pair(
+ ws(tag($op)),
+ expr_any,
+ ))
+ ))(i)?;
+ Ok((i, match op_and_right {
+ Some((op, right)) => Expr::BinOp(
+ str::from_utf8(op).unwrap(), Box::new(left), Box::new(right)
+ ),
+ None => left,
+ }))
+ }
+ };
+ ( $name:ident, $inner:ident, $( $op:expr ),+ ) => {
+ fn $name(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (left, op_and_right)) = tuple((
+ $inner,
+ opt(pair(
+ ws(alt(($( tag($op) ),*,))),
+ expr_any
+ ))
+ ))(i)?;
+ Ok((i, match op_and_right {
Some((op, right)) => Expr::BinOp(
str::from_utf8(op).unwrap(), Box::new(left), Box::new(right)
),
None => left,
- })
- ));
+ }))
+ }
}
}
@@ -515,313 +552,444 @@ expr_prec_layer!(expr_compare, expr_bor, "==", "!=", ">=", ">", "<=", "<");
expr_prec_layer!(expr_and, expr_compare, "&&");
expr_prec_layer!(expr_or, expr_and, "||");
-named!(range_right<&[u8], Expr>, do_parse!(
- ws!(tag!("..")) >>
- incl: opt!(ws!(tag!("="))) >>
- right: opt!(expr_or) >>
- (Expr::Range(if incl.is_some() { "..=" } else { ".." }, None, right.map(Box::new)))
-));
-
-named!(expr_any<&[u8], Expr>, alt!(
- range_right |
- do_parse!(
- left: expr_or >>
- rest: range_right >> (match rest {
- Expr::Range(op, _, right) => Expr::Range(op, Some(Box::new(left)), right),
- _ => unreachable!(),
- })
- ) |
- expr_or
-));
-
-named_args!(expr_node<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- call!(tag_expr_start, s) >>
- pws: opt!(tag!("-")) >>
- expr: ws!(expr_any) >>
- nws: opt!(tag!("-")) >>
- call!(tag_expr_end, s) >>
- (Node::Expr(WS(pws.is_some(), nws.is_some()), expr))
-));
-
-named!(block_call<&[u8], Node>, do_parse!(
- pws: opt!(tag!("-")) >>
- ws!(tag!("call")) >>
- scope: opt!(do_parse!(
- scope: ws!(identifier) >>
- ws!(tag!("::")) >>
- (scope)
- )) >>
- name: ws!(identifier) >>
- args: ws!(arguments) >>
- nws: opt!(tag!("-")) >>
- (Node::Call(WS(pws.is_some(), nws.is_some()), scope, name, args))
-));
-
-named!(cond_if<&[u8], Expr>, do_parse!(
- ws!(tag!("if")) >>
- cond: ws!(expr_any) >>
- (cond)
-));
-
-named_args!(cond_block<'a>(s: &'a Syntax<'a>) <&'a [u8], Cond<'a>>, do_parse!(
- call!(tag_block_start, s) >>
- pws: opt!(tag!("-")) >>
- ws!(tag!("else")) >>
- cond: opt!(cond_if) >>
- nws: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- block: call!(parse_template, s) >>
- (WS(pws.is_some(), nws.is_some()), cond, block)
-));
-
-named_args!(block_if<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- pws1: opt!(tag!("-")) >>
- cond: ws!(cond_if) >>
- nws1: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- block: call!(parse_template, s) >>
- elifs: many0!(call!(cond_block, s)) >>
- call!(tag_block_start, s) >>
- pws2: opt!(tag!("-")) >>
- ws!(tag!("endif")) >>
- nws2: opt!(tag!("-")) >>
- ({
- let mut res = Vec::new();
- res.push((WS(pws1.is_some(), nws1.is_some()), Some(cond), block));
- res.extend(elifs);
- Node::Cond(res, WS(pws2.is_some(), nws2.is_some()))
- })
-));
-
-named_args!(match_else_block<'a>(s: &'a Syntax<'a>) <&'a [u8], When<'a>>, do_parse!(
- call!(tag_block_start, s) >>
- pws: opt!(tag!("-")) >>
- ws!(tag!("else")) >>
- nws: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- block: call!(parse_template, s) >>
- (WS(pws.is_some(), nws.is_some()), None, MatchParameters::Simple(vec![]), block)
-));
-
-named_args!(when_block<'a>(s: &'a Syntax<'a>) <&'a [u8], When<'a>>, do_parse!(
- call!(tag_block_start, s) >>
- pws: opt!(tag!("-")) >>
- ws!(tag!("when")) >>
- variant: ws!(match_variant) >>
- params: opt!(ws!(with_parameters)) >>
- nws: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- block: call!(parse_template, s) >>
- (WS(pws.is_some(), nws.is_some()), Some(variant), params.unwrap_or_default(), block)
-));
-
-named_args!(block_match<'a>(s: &'a Syntax<'a>)<&'a [u8], Node<'a>>, do_parse!(
- pws1: opt!(tag!("-")) >>
- ws!(tag!("match")) >>
- expr: ws!(expr_any) >>
- nws1: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- inter: opt!(call!(take_content, s)) >>
- arms: many1!(call!(when_block, s)) >>
- else_arm: opt!(call!(match_else_block, s)) >>
- ws!(call!(tag_block_start, s)) >>
- pws2: opt!(tag!("-")) >>
- ws!(tag!("endmatch")) >>
- nws2: opt!(tag!("-")) >>
- ({
- let mut arms = arms;
- if let Some(arm) = else_arm {
- arms.push(arm);
+fn range_right(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (_, incl, right)) = tuple((ws(tag("..")), opt(ws(tag("="))), opt(expr_or)))(i)?;
+ Ok((
+ i,
+ Expr::Range(
+ if incl.is_some() { "..=" } else { ".." },
+ None,
+ right.map(Box::new),
+ ),
+ ))
+}
+
+fn expr_any(i: &[u8]) -> IResult<&[u8], Expr> {
+ let compound = map(tuple((expr_or, range_right)), |(left, rest)| match rest {
+ Expr::Range(op, _, right) => Expr::Range(op, Some(Box::new(left)), right),
+ _ => unreachable!(),
+ });
+ let p = alt((range_right, compound, expr_or));
+ Ok(p(i)?)
+}
+
+fn expr_node<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let p = tuple((
+ |i| tag_expr_start(i, s),
+ opt(tag("-")),
+ ws(expr_any),
+ opt(tag("-")),
+ |i| tag_expr_end(i, s),
+ ));
+ let (i, (_, pws, expr, nws, _)) = p(i)?;
+ Ok((i, Node::Expr(WS(pws.is_some(), nws.is_some()), expr)))
+}
+
+fn block_call(i: &[u8]) -> IResult<&[u8], Node> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("call")),
+ opt(tuple((ws(identifier), ws(tag("::"))))),
+ ws(identifier),
+ ws(arguments),
+ opt(tag("-")),
+ ));
+ let (i, (pws, _, scope, name, args, nws)) = p(i)?;
+ let scope = scope.map(|(scope, _)| scope);
+ Ok((
+ i,
+ Node::Call(WS(pws.is_some(), nws.is_some()), scope, name, args),
+ ))
+}
+
+fn cond_if(i: &[u8]) -> IResult<&[u8], Expr> {
+ let (i, (_, cond)) = tuple((ws(tag("if")), ws(expr_any)))(i)?;
+ Ok((i, cond))
+}
+
+fn cond_block<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Cond<'a>> {
+ let p = tuple((
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("else")),
+ opt(cond_if),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ |i| parse_template(i, s),
+ ));
+ let (i, (_, pws, _, cond, nws, _, block)) = p(i)?;
+ Ok((i, (WS(pws.is_some(), nws.is_some()), cond, block)))
+}
+
+fn block_if<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let p = tuple((
+ opt(tag("-")),
+ cond_if,
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ |i| parse_template(i, s),
+ many0(|i| cond_block(i, s)),
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("endif")),
+ opt(tag("-")),
+ ));
+ let (i, (pws1, cond, nws1, _, block, elifs, _, pws2, _, nws2)) = p(i)?;
+
+ let mut res = Vec::new();
+ res.push((WS(pws1.is_some(), nws1.is_some()), Some(cond), block));
+ res.extend(elifs);
+ Ok((i, Node::Cond(res, WS(pws2.is_some(), nws2.is_some()))))
+}
+
+fn match_else_block<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], When<'a>> {
+ let p = tuple((
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("else")),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ |i| parse_template(i, s),
+ ));
+ let (i, (_, pws, _, nws, _, block)) = p(i)?;
+ Ok((
+ i,
+ (
+ WS(pws.is_some(), nws.is_some()),
+ None,
+ MatchParameters::Simple(vec![]),
+ block,
+ ),
+ ))
+}
+
+fn when_block<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], When<'a>> {
+ let p = tuple((
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("when")),
+ ws(match_variant),
+ opt(ws(with_parameters)),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ |i| parse_template(i, s),
+ ));
+ let (i, (_, pws, _, variant, params, nws, _, block)) = p(i)?;
+ Ok((
+ i,
+ (
+ WS(pws.is_some(), nws.is_some()),
+ Some(variant),
+ params.unwrap_or_default(),
+ block,
+ ),
+ ))
+}
+
+fn block_match<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("match")),
+ ws(expr_any),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ opt(|i| take_content(i, s)),
+ many1(|i| when_block(i, s)),
+ opt(|i| match_else_block(i, s)),
+ ws(|i| tag_block_start(i, s)),
+ opt(tag("-")),
+ ws(tag("endmatch")),
+ opt(tag("-")),
+ ));
+ let (i, (pws1, _, expr, nws1, _, inter, arms, else_arm, _, pws2, _, nws2)) = p(i)?;
+
+ let mut arms = arms;
+ if let Some(arm) = else_arm {
+ arms.push(arm);
+ }
+
+ let inter = match inter {
+ Some(Node::Lit(lws, val, rws)) => {
+ assert!(
+ val.is_empty(),
+ "only whitespace allowed between match and first when, found {}",
+ val
+ );
+ assert!(
+ rws.is_empty(),
+ "only whitespace allowed between match and first when, found {}",
+ rws
+ );
+ Some(lws)
}
- let inter = match inter {
- Some(Node::Lit(lws, val, rws)) => {
- assert!(val.is_empty(),
- "only whitespace allowed between match and first when, found {}", val);
- assert!(rws.is_empty(),
- "only whitespace allowed between match and first when, found {}", rws);
- Some(lws)
- },
- None => None,
- _ => panic!("only literals allowed between match and first when"),
- };
+ None => None,
+ _ => panic!("only literals allowed between match and first when"),
+ };
+
+ Ok((
+ i,
Node::Match(
WS(pws1.is_some(), nws1.is_some()),
expr,
inter,
arms,
WS(pws2.is_some(), nws2.is_some()),
- )
- })
-));
-
-named!(block_let<&[u8], Node>, do_parse!(
- pws: opt!(tag!("-")) >>
- ws!(tag!("let")) >>
- var: ws!(alt!(target_single | target_tuple)) >>
- val: opt!(do_parse!(
- ws!(tag!("=")) >>
- val: ws!(expr_any) >>
- (val)
- )) >>
- nws: opt!(tag!("-")) >>
- (if val.is_some() {
- Node::Let(WS(pws.is_some(), nws.is_some()), var, val.unwrap())
- } else {
- Node::LetDecl(WS(pws.is_some(), nws.is_some()), var)
- })
-));
-
-named_args!(block_for<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- pws1: opt!(tag!("-")) >>
- ws!(tag!("for")) >>
- var: ws!(alt!(target_single | target_tuple)) >>
- ws!(tag!("in")) >>
- iter: ws!(expr_any) >>
- nws1: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- block: call!(parse_template, s) >>
- call!(tag_block_start, s) >>
- pws2: opt!(tag!("-")) >>
- ws!(tag!("endfor")) >>
- nws2: opt!(tag!("-")) >>
- (Node::Loop(WS(pws1.is_some(), nws1.is_some()),
- var, iter, block,
- WS(pws2.is_some(), nws2.is_some())))
-));
-
-named!(block_extends<&[u8], Node>, do_parse!(
- ws!(tag!("extends")) >>
- name: ws!(expr_str_lit) >>
- (Node::Extends(name))
-));
-
-named_args!(block_block<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- pws1: opt!(tag!("-")) >>
- ws!(tag!("block")) >>
- name: ws!(identifier) >>
- nws1: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- contents: call!(parse_template, s) >>
- call!(tag_block_start, s) >>
- pws2: opt!(tag!("-")) >>
- ws!(tag!("endblock")) >>
- opt!(ws!(tag!(name))) >>
- nws2: opt!(tag!("-")) >>
- (Node::BlockDef(WS(pws1.is_some(), nws1.is_some()),
- name, contents,
- WS(pws2.is_some(), nws2.is_some())))
-));
-
-named!(block_include<&[u8], Node>, do_parse!(
- pws: opt!(tag!("-")) >>
- ws!(tag!("include")) >>
- name: ws!(expr_str_lit) >>
- nws: opt!(tag!("-")) >>
- (Node::Include(WS(pws.is_some(), nws.is_some()), match name {
- Expr::StrLit(s) => s,
- _ => panic!("include path must be a string literal"),
- }))
-));
-
-named!(block_import<&[u8], Node>, do_parse!(
- pws: opt!(tag!("-")) >>
- ws!(tag!("import")) >>
- name: ws!(expr_str_lit) >>
- ws!(tag!("as")) >>
- scope: ws!(identifier) >>
- nws: opt!(tag!("-")) >>
- (Node::Import(WS(pws.is_some(), nws.is_some()), match name {
- Expr::StrLit(s) => s,
- _ => panic!("import path must be a string literal"),
- }, scope))
-));
-
-named_args!(block_macro<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- pws1: opt!(tag!("-")) >>
- ws!(tag!("macro")) >>
- name: ws!(identifier) >>
- params: ws!(parameters) >>
- nws1: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- contents: call!(parse_template, s) >>
- call!(tag_block_start, s) >>
- pws2: opt!(tag!("-")) >>
- ws!(tag!("endmacro")) >>
- nws2: opt!(tag!("-")) >>
- ({
- if name == "super" {
- panic!("invalid macro name 'super'");
- }
+ ),
+ ))
+}
+
+fn block_let(i: &[u8]) -> IResult<&[u8], Node> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("let")),
+ ws(alt((target_single, target_tuple))),
+ opt(tuple((ws(tag("=")), ws(expr_any)))),
+ opt(tag("-")),
+ ));
+ let (i, (pws, _, var, val, nws)) = p(i)?;
+
+ Ok((
+ i,
+ if let Some((_, val)) = val {
+ Node::Let(WS(pws.is_some(), nws.is_some()), var, val)
+ } else {
+ Node::LetDecl(WS(pws.is_some(), nws.is_some()), var)
+ },
+ ))
+}
+
+fn block_for<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("for")),
+ ws(alt((target_single, target_tuple))),
+ ws(tag("in")),
+ ws(expr_any),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ |i| parse_template(i, s),
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("endfor")),
+ opt(tag("-")),
+ ));
+ let (i, (pws1, _, var, _, iter, nws1, _, block, _, pws2, _, nws2)) = p(i)?;
+ Ok((
+ i,
+ Node::Loop(
+ WS(pws1.is_some(), nws1.is_some()),
+ var,
+ iter,
+ block,
+ WS(pws2.is_some(), nws2.is_some()),
+ ),
+ ))
+}
+
+fn block_extends(i: &[u8]) -> IResult<&[u8], Node> {
+ let (i, (_, name)) = tuple((ws(tag("extends")), ws(expr_str_lit)))(i)?;
+ Ok((i, Node::Extends(name)))
+}
+
+fn block_block<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let start = tuple((
+ opt(tag("-")),
+ ws(tag("block")),
+ ws(identifier),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ |i| parse_template(i, s),
+ ));
+ let (i, (pws1, _, name, nws1, _, contents)) = start(i)?;
+
+ let end = tuple((
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("endblock")),
+ opt(ws(tag(name))),
+ opt(tag("-")),
+ ));
+ let (i, (_, pws2, _, _, nws2)) = end(i)?;
+
+ Ok((
+ i,
+ Node::BlockDef(
+ WS(pws1.is_some(), nws1.is_some()),
+ name,
+ contents,
+ WS(pws2.is_some(), nws2.is_some()),
+ ),
+ ))
+}
+
+fn block_include(i: &[u8]) -> IResult<&[u8], Node> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("include")),
+ ws(expr_str_lit),
+ opt(tag("-")),
+ ));
+ let (i, (pws, _, name, nws)) = p(i)?;
+ Ok((
+ i,
+ Node::Include(
+ WS(pws.is_some(), nws.is_some()),
+ match name {
+ Expr::StrLit(s) => s,
+ _ => panic!("include path must be a string literal"),
+ },
+ ),
+ ))
+}
+
+fn block_import(i: &[u8]) -> IResult<&[u8], Node> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("import")),
+ ws(expr_str_lit),
+ ws(tag("as")),
+ ws(identifier),
+ opt(tag("-")),
+ ));
+ let (i, (pws, _, name, _, scope, nws)) = p(i)?;
+ Ok((
+ i,
+ Node::Import(
+ WS(pws.is_some(), nws.is_some()),
+ match name {
+ Expr::StrLit(s) => s,
+ _ => panic!("import path must be a string literal"),
+ },
+ scope,
+ ),
+ ))
+}
+
+fn block_macro<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("macro")),
+ ws(identifier),
+ ws(parameters),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ |i| parse_template(i, s),
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("endmacro")),
+ opt(tag("-")),
+ ));
+
+ let (i, (pws1, _, name, params, nws1, _, contents, _, pws2, _, nws2)) = p(i)?;
+ if name == "super" {
+ panic!("invalid macro name 'super'");
+ }
+
+ Ok((
+ i,
Node::Macro(
name,
Macro {
ws1: WS(pws1.is_some(), nws1.is_some()),
args: params,
nodes: contents,
- ws2: WS(pws2.is_some(), nws2.is_some())
- }
- )
- })
-));
-
-named_args!(block_raw<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- pws1: opt!(tag!("-")) >>
- ws!(tag!("raw")) >>
- nws1: opt!(tag!("-")) >>
- call!(tag_block_end, s) >>
- contents: take_until!("{% endraw %}") >>
- call!(tag_block_start, s) >>
- pws2: opt!(tag!("-")) >>
- ws!(tag!("endraw")) >>
- nws2: opt!(tag!("-")) >>
- ({
- let str_contents = str::from_utf8(&contents).unwrap();
- (Node::Raw(WS(pws1.is_some(), nws1.is_some()),
- str_contents,
- WS(pws2.is_some(), nws2.is_some())))
- })
-));
-
-named_args!(block_node<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- call!(tag_block_start, s) >>
- contents: alt!(
- block_call |
- block_let |
- call!(block_if, s) |
- call!(block_for, s) |
- call!(block_match, s) |
- block_extends |
- block_include |
- block_import |
- call!(block_block, s) |
- call!(block_macro, s) |
- call!(block_raw, s)
- ) >>
- call!(tag_block_end, s) >>
- (contents)
-));
-
-named_args!(block_comment<'a>(s: &'a Syntax<'a>) <&'a [u8], Node<'a>>, do_parse!(
- call!(tag_comment_start, s) >>
- pws: opt!(tag!("-")) >>
- inner: take_until!(s.comment_end) >>
- call!(tag_comment_end, s) >>
- (Node::Comment(WS(pws.is_some(), inner.len() > 1 && inner[inner.len() - 1] == b'-')))
-));
-
-named_args!(parse_template<'a>(s: &'a Syntax<'a>)<&'a [u8], Vec<Node<'a>>>, many0!(alt!(
- complete!(call!(take_content, s)) |
- complete!(call!(block_comment, s)) |
- complete!(call!(expr_node, s)) |
- complete!(call!(block_node, s))
-)));
-
-named_args!(tag_block_start<'a>(s: &'a Syntax<'a>) <&'a [u8], &'a [u8]>, tag!(s.block_start));
-named_args!(tag_block_end<'a>(s: &'a Syntax<'a>) <&'a [u8], &'a [u8]>, tag!(s.block_end));
-named_args!(tag_comment_start<'a>(s: &'a Syntax<'a>) <&'a [u8], &'a [u8]>, tag!(s.comment_start));
-named_args!(tag_comment_end<'a>(s: &'a Syntax<'a>) <&'a [u8], &'a [u8]>, tag!(s.comment_end));
-named_args!(tag_expr_start<'a>(s: &'a Syntax<'a>) <&'a [u8], &'a [u8]>, tag!(s.expr_start));
-named_args!(tag_expr_end<'a>(s: &'a Syntax<'a>) <&'a [u8], &'a [u8]>, tag!(s.expr_end));
+ ws2: WS(pws2.is_some(), nws2.is_some()),
+ },
+ ),
+ ))
+}
+
+fn block_raw<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let p = tuple((
+ opt(tag("-")),
+ ws(tag("raw")),
+ opt(tag("-")),
+ |i| tag_block_end(i, s),
+ take_until("{% endraw %}"),
+ |i| tag_block_start(i, s),
+ opt(tag("-")),
+ ws(tag("endraw")),
+ opt(tag("-")),
+ ));
+
+ let (i, (pws1, _, nws1, _, contents, _, pws2, _, nws2)) = p(i)?;
+ let str_contents = str::from_utf8(contents).unwrap();
+ Ok((
+ i,
+ Node::Raw(
+ WS(pws1.is_some(), nws1.is_some()),
+ str_contents,
+ WS(pws2.is_some(), nws2.is_some()),
+ ),
+ ))
+}
+
+fn block_node<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let 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| tag_block_end(i, s),
+ ));
+ let (i, (_, contents, _)) = p(i)?;
+ Ok((i, contents))
+}
+
+fn block_comment<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], Node<'a>> {
+ let p = tuple((
+ |i| tag_comment_start(i, s),
+ opt(tag("-")),
+ take_until(s.comment_end),
+ |i| tag_comment_end(i, s),
+ ));
+ let (i, (_, pws, inner, _)) = p(i)?;
+ Ok((
+ i,
+ Node::Comment(WS(
+ pws.is_some(),
+ inner.len() > 1 && inner[inner.len() - 1] == b'-',
+ )),
+ ))
+}
+
+fn parse_template<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], 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 tag_block_start<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], &'a [u8]> {
+ tag(s.block_start)(i)
+}
+fn tag_block_end<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], &'a [u8]> {
+ tag(s.block_end)(i)
+}
+fn tag_comment_start<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], &'a [u8]> {
+ tag(s.comment_start)(i)
+}
+fn tag_comment_end<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], &'a [u8]> {
+ tag(s.comment_end)(i)
+}
+fn tag_expr_start<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], &'a [u8]> {
+ tag(s.expr_start)(i)
+}
+fn tag_expr_end<'a>(i: &'a [u8], s: &'a Syntax<'a>) -> IResult<&'a [u8], &'a [u8]> {
+ tag(s.expr_end)(i)
+}
pub fn parse<'a>(src: &'a str, syntax: &'a Syntax<'a>) -> Vec<Node<'a>> {
match parse_template(src.as_bytes(), syntax) {
generated by cgit (git 2.34.1) at 2024-11-22 11:30:50 +0000