3612 – ExpressionList is undefined

D issues are now tracked on GitHub. This Bugzilla instance remains as a read-only archive.

Issue 3612 - ExpressionList is undefined

Summary: ExpressionList is undefined

Status:	RESOLVED FIXED
Alias:	None
Product:	D
Classification:	Unclassified
Component:	dlang.org (show other issues)
Version:	D2
Hardware:	Other All
Importance :	P2 normal
Assignee:	No Owner
URL:	http://digitalmars.com/d/2.0/statemen...
Keywords:	spec
Depends on:
Blocks:

See Also:
Reported:	2009年12月12日 10:54 UTC by Jerry Quinn
Modified:	2015年06月09日 01:27 UTC (History)
CC List:	2 users (show)

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this issue.

Description Jerry Quinn 2009年12月12日 10:54:42 UTC

CaseStatement is currently written as
CaseStatement:
	case ExpressionList : Statement
Here the grammar refers to ExpressionList, described as a ',' separated list of Expression. However, Expression is a ',' separated list of AssignExpression. So this is highly ambiguous. There's no way from the description to distinguish between AssignExpressions that should be evaluated and ignored, and cases to be handled.
If we define:
ExpressionList:
 AssignExpression
 AssignExpression , ExpressionList
then the problem goes away. The text should be adjusted to match.

Comment 1 Leandro Lucarella 2009年12月14日 06:30:25 UTC

http://www.dsource.org/projects/phobos/changeset/1375

Comment 2 Walter Bright 2009年12月31日 11:17:07 UTC

Fixed dmd 1.054 and 2.038