Issue 1152: Expressions parsed differently than intended

Created on 2009-06-27.00:00:00 last changed 156 months ago

Date: 2013-01-25.00:32:43

Proposed resolution:

Change Table 83 — Floating-point conversions in [facet.num.put.virtuals]:

Table 83 — Floating-point conversions
State	`stdio` equivalent
`floatfield == (ios_base::fixed \| ios_base::scientific) && !uppercase`	`%a`
`floatfield == (ios_base::fixed \| ios_base::scientific)`	`%A`

msg6337 (view)

Date: 2009-10-28.00:00:00

[ 2009-10-28 Howard: ]

Moved to Tentatively Ready after 5 positive votes on c++std-lib.

msg6336 (view)

Date: 2009-06-27.00:00:00

In Table 73 — Floating-point conversions, [facet.num.put.virtuals], in N2914, we have the following entries:

Table 73 — Floating-point conversions
State	`stdio` equivalent
`floatfield == ios_base::fixed \| ios_base::scientific && !uppercase`	`%a`
`floatfield == ios_base::fixed \| ios_base::scientific`	`%A`

These expressions are supposed to mean:

floatfield == (ios_base::fixed | ios_base::scientific) && !uppercase 
floatfield == (ios_base::fixed | ios_base::scientific)

but technically parsed as:

((floatfield == ios_base::fixed) | ios_base::scientific) && (!uppercase) 
((floatfield == ios_base::fixed) | ios_base::scientific)

and should be corrected with additional parentheses, as shown above.