cond-cmp-numeric-eq.mk revision 1.2 
1# $NetBSD: cond-cmp-numeric-eq.mk,v 1.2 2020/09/11 15:19:04 rillig Exp $
2#
3# Tests for numeric comparisons with the == operator in .if conditions.
4
5# This comparison yields the same result, whether numeric or character-based.
6.if 1 == 1
7.else
8.error
9.endif
10
11# This comparison yields the same result, whether numeric or character-based.
12.if 1 == 2
13.error
14.endif
15
16.if 2 == 1
17.error
18.endif
19
20# Scientific notation is supported, as per strtod.
21.if 2e7 == 2000e4
22.else
23.error
24.endif
25
26.if 2000e4 == 2e7
27.else
28.error
29.endif
30
31# Trailing zeroes after the decimal point are irrelevant for the numeric
32# value.
33.if 3.30000 == 3.3
34.else
35.error
36.endif
37
38.if 3.3 == 3.30000
39.else
40.error
41.endif
42
43# As of 2020-08-23, numeric comparison is implemented as parsing both sides
44# as double, and then performing a normal comparison.  The range of double is
45# typically 16 or 17 significant digits, therefore these two numbers seem to
46# be equal.
47.if 1.000000000000000001 == 1.000000000000000002
48.else
49.error
50.endif
51
52
53# There is no = operator for numbers.  Well, not quite, there is one, but
54# it generates a warning.  Therefore it is not used in practice.
55.if !(12345 = 12345)
56.  error
57.else
58.  error
59.endif
60
61# There is no === operator for numbers either.
62.if !(12345 === 12345)
63.  error
64.else
65.  error
66.endif
67
68all:
69	@:;
70