test/uninit5.awk - master - githubmirror/gawk

test/uninit5.awk
110 строк5 KB
Arnold D. Robbins
Move to 3.1.8.
16 июл 2010, 15:55
16 июл 2010, 15:5500ef042
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#Date: Sat, 29 Aug 2009 20:04:03 -0700 (PDT)
#From: Greg Johnson <gregfjohnson@yahoo.com>
#Subject: bugs in passing uninitialized array to a function
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#--0-1690489838-1251601443=:68490
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#
#I am using gawk version 3.1.7.
#
#The attached programs illustrate what look to me like two bugs
#in the handling of uninitialized variables to functions that treat
#them as arrays.
#
#Greg Johnson
#
#
#      
#--0-1690489838-1251601443=:68490
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# bug?  on uninitialized array, length(a) prints as 3, then the loop
# behaves differently, iterating once.  so, length() behaves differently
# on two calls to the same variable, which was not changed.

function prt1(a, len)
{
    print "length:  " length(a)

    for (i = 1; i <= length(a); i++)
        printf "<" i "," a[i] "> "

    print "\n"
}

BEGIN {
    prt1(zzz)
}

#--0-1690489838-1251601443=:68490
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# shouldn't an uninitialized array have length zero?
# length is printed as 1, and the loop iterates once.

function prt(a, len)
{
    len = length(a)
    print "length:  " len

    for (i = 1; i <= len; i++)
        printf "<" i "," a[i] "> "

    print "\n"
}

BEGIN {
    prt(zzz)
}

#--0-1690489838-1251601443=:68490--