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"f match 3 with _ -> 3" is not an expression #8108

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vicuna opened this issue Apr 15, 2003 · 1 comment
Closed

"f match 3 with _ -> 3" is not an expression #8108

vicuna opened this issue Apr 15, 2003 · 1 comment
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@vicuna
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vicuna commented Apr 15, 2003

Original bug ID: 1642
Reporter: administrator
Status: closed
Resolution: not a bug
Priority: normal
Severity: minor
Category: ~DO NOT USE (was: OCaml general)

Bug description

"match 3 with _ -> 3" is an expression, and "f" is an expression, so
according to the documented grammar "f match 3 with _ -> 3" should be
an expression. The implementation forces me to parenthesize the match:

let f x = x;;

val f : 'a -> 'a =

f match 3 with _ -> 3;;

Characters 2-7:
f match 3 with _ -> 3;;
^^^^^
Syntax error

f (match 3 with _ -> 3);;

  • : int = 3

--
Tim Freeman tim@fungible.com
Which is worse: ignorance or apathy? Who knows? Who cares?
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@vicuna
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vicuna commented Aug 20, 2003

Comment author: administrator

The reference manual doesn't contain a full grammar of the language, more like
an AST definition using concrete syntax and precedence hints. Note that the
precedence table says that function application binds tighter than "match",
hence the fact that the "match" must be parenthesized is somewhat documented.
-XL, 2003-08-20

@vicuna vicuna closed this as completed Aug 20, 2003
@vicuna vicuna added the bug label Mar 19, 2019
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