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move in parens over

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This commit is contained in:
Folkert 2021-02-25 15:19:56 +01:00
parent aa75094c53
commit a1d72fd74d
1 changed files with 32 additions and 12 deletions
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44
compiler/parse/src/expr.rs
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@ -2,8 +2,8 @@ use crate::ast::{
AssignedField, Attempting, CommentOrNewline, Def, Expr, Pattern, Spaceable, TypeAnnotation,
};
use crate::blankspace::{
line_comment, space0, space0_after, space0_after_e, space0_around, space0_around_ee,
space0_before, space0_before_e, space0_e, space1, space1_before, spaces_exactly,
line_comment, space0, space0_after, space0_after_e, space0_around_ee, space0_before,
space0_before_e, space0_e, space1, space1_before, spaces_exactly,
};
use crate::ident::{ident, lowercase_ident, Ident};
use crate::keyword;
@ -11,8 +11,8 @@ use crate::number_literal::number_literal;
use crate::parser::{
self, allocated, and_then_with_indent_level, ascii_char, ascii_string, attempt, backtrackable,
fail, map, newline_char, not, not_followed_by, optional, sep_by1, sep_by1_e, specialize,
specialize_ref, then, unexpected, unexpected_eof, word1, word2, EExpr, ELambda, Either, If,
List, ParseResult, Parser, State, SyntaxError, When,
specialize_ref, then, unexpected, unexpected_eof, word1, word2, EExpr, EInParens, ELambda,
Either, If, List, ParseResult, Parser, State, SyntaxError, When,
};
use crate::pattern::loc_closure_param;
use crate::type_annotation;
@ -29,17 +29,38 @@ pub fn expr<'a>(min_indent: u16) -> impl Parser<'a, Expr<'a>, SyntaxError<'a>> {
move |arena, state: State<'a>| parse_expr(min_indent, arena, state)
}
fn loc_expr_in_parens<'a>(min_indent: u16) -> impl Parser<'a, Located<Expr<'a>>, SyntaxError<'a>> {
specialize(
|e, r, c| SyntaxError::Expr(EExpr::InParens(e, r, c)),
loc_expr_in_parens_help(min_indent),
)
}
fn loc_expr_in_parens_help<'a>(
min_indent: u16,
) -> impl Parser<'a, Located<Expr<'a>>, EInParens<'a>> {
between!(
word1(b'(', EInParens::Open),
space0_around_ee(
specialize_ref(
EInParens::Syntax,
loc!(move |arena, state| parse_expr(min_indent, arena, state))
),
min_indent,
EInParens::Space,
EInParens::IndentOpen,
EInParens::IndentEnd,
),
word1(b')', EInParens::End)
)
}
macro_rules! loc_parenthetical_expr {
($min_indent:expr, $args_parser:expr) => {
then(
loc!(and!(
between!(
ascii_char(b'(' ),
map_with_arena!(
space0_around(
loc!(move |arena, state| parse_expr($min_indent, arena, state)),
$min_indent,
),
loc_expr_in_parens($min_indent),
|arena: &'a Bump, loc_expr: Located<Expr<'a>>| {
Located {
region: loc_expr.region,
@ -47,8 +68,7 @@ macro_rules! loc_parenthetical_expr {
}
}
),
ascii_char(b')' )
),
optional(either!(
// There may optionally be function args after the ')'
// e.g. ((foo bar) baz)