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Bug #18878

open

parse.y: Foo::Bar {} is inconsistently rejected

Added by qnighy (Masaki Hara) over 1 year ago. Updated 6 months ago.

Status:
Open
Assignee:
-
Target version:
-
ruby -v:
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]
[ruby-core:109052]

Description

The following source doesn't parse:

Foo::Bar {}

despite the following:

bar           # local variable or method call
Bar           # constant
bar()         # method call
Bar()         # method call
bar {}        # method call
Bar {}        # method call
bar() {}      # method call
Bar() {}      # method call
Foo::bar      # method call
Foo::Bar      # constant
Foo::bar()    # method call
Foo::Bar()    # method call
Foo::bar {}   # method call
# Foo::Bar {} # SyntaxError
Foo::bar() {} # method call
Foo::Bar() {} # method call

Especially considering Bar {}, this looks like a missing implementation rather than an intentional behavior.

Updated by lhmzhou (Linda Zhou) over 1 year ago

Is there a more descriptive error message, or is SyntaxError the only output provided?

Updated by qnighy (Masaki Hara) over 1 year ago

Is there a more descriptive error message, or is SyntaxError the only output provided?

This is the actual error message:

% ruby -e 'Foo::Bar {}'
-e:1: syntax error, unexpected '{'
Foo::Bar {}

Updated by jeremyevans0 (Jeremy Evans) 6 months ago

It looks like this will be fixed by YARP:

$ ruby -r yarp -e "pp YARP.parse('Foo::Bar {}')"
#<YARP::ParseResult:0x00000b1512acc448
 @comments=[],
 @errors=[],
 @source=#<YARP::Source:0x00000b14749d6690 @offsets=[0], @source="Foo::Bar {}">,
 @value=
  ProgramNode(0...11)(
    [],
    StatementsNode(0...11)(
      [CallNode(0...11)(ConstantReadNode(0...3)(), (3...5), (5...8), nil, nil, nil, BlockNode(9...11)([], nil, nil, (9...10), (10...11)), 0, "Bar")]
    )
  ),
 @warnings=[]>
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