tweag/nickel
1
1
Fork 0
mirror of https://github.com/tweag/nickel.git synced 2024-10-06 08:07:37 +03:00
Code Issues Projects Releases Wiki Activity

Merge pull request #457 from tweag/feature/pipe-operator

Browse Source 
[Syntax]Pipe operator (reverse application)
This commit is contained in:
Théophane Hufschmitt 2021-11-10 12:12:27 +01:00 committed by GitHub
commit 70dee569fd
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/grammar.lalrpop
View File

@ -398,6 +398,8 @@ InfixExpr: RichTerm = {
#[precedence(level="6")] #[assoc(side="left")]
<t1: WithPos<InfixExpr>> "&" <t2: WithPos<InfixExpr>> =>
mk_term::op2(BinaryOp::Merge(), t1, t2),
<t1: WithPos<InfixExpr>> "|>" <t2: WithPos<InfixExpr>> =>
mk_app!(t2, t1),
#[precedence(level="7")] #[assoc(side="left")]
<t1: WithPos<InfixExpr>> "<" <t2: WithPos<InfixExpr>> =>
@ -576,6 +578,7 @@ extern {
"fun" => Token::Normal(NormalToken::Fun),
"import" => Token::Normal(NormalToken::Import),
"|" => Token::Normal(NormalToken::Pipe),
"|>" => Token::Normal(NormalToken::RightPipe),
"->" => Token::Normal(NormalToken::SimpleArrow),
"=>" => Token::Normal(NormalToken::DoubleArrow),
"#" => Token::Normal(NormalToken::Hash),

2
src/parser/lexer.rs
View File

@ -130,6 +130,8 @@ pub enum NormalToken<'input> {
Import,
#[token("|")]
Pipe,
#[token("|>")]
RightPipe,
#[token("->")]
SimpleArrow,
#[token("=>")]

8
tests/pass/builtins.ncl
View File

@ -19,4 +19,12 @@ let Assert = fun l x => x || %blame% l in
let r = {a=(inj 1),b=(cat "a" "b")} in
%deepSeq% r (r.a.b) == 3 | #Assert) &&
([1,2,3]
|> lists.map (fun x => x + 1)
|> lists.filter (fun x => x > 2)
|> builtins.serialize `Json
|> builtins.deserialize `Json
== [3,4]
| #Assert) &&
true