Fri Aug 28 13:50:48 2020 UTC ()

make(1): add test for operator precedence in conditions


(rillig)

diff -r1.2 -r1.3 src/usr.bin/make/unit-tests/cond-op.mk

--- src/usr.bin/make/unit-tests/cond-op.mk 2020/08/16 14:25:16	1.2
+++ src/usr.bin/make/unit-tests/cond-op.mk 2020/08/28 13:50:48	1.3

 @@ -1,8 +1,42 @@
-# $NetBSD: cond-op.mk,v 1.2 2020/08/16 14:25:16 rillig Exp $
+# $NetBSD: cond-op.mk,v 1.3 2020/08/28 13:50:48 rillig Exp $
+#
 # Tests for operators like &&, ||, ! in .if conditions.
+#
 # See also:
 #	cond-op-and.mk
 #	cond-op-not.mk
 #	cond-op-or.mk
 #	cond-op-parentheses.mk
 # In make, && binds more tightly than ||, like in C.
 # If make had the same precedence for both && and ||, the result would be
 # different.
 # If || were to bind more tightly than &&, the result would be different
 # as well.
 .if !(1 || 1 && 0)
 .error
 .endif
 # If make were to interpret the && and || operators like the shell, the
 # implicit binding would be this:
 .if (1 || 1) && 0
 .error
 .endif
 # The precedence of the ! operator is different from C though. It has a
 # lower precedence than the comparison operators.
 .if !"word" == "word"
 .error
 .endif
 # This is how the above condition is actually interpreted.
 .if !("word" == "word")
 .error
 .endif
-# TODO: Implementation
+# TODO: Demonstrate that the precedence of the ! and == operators actually
 # makes a difference.  There is a simple example for sure, I just cannot
 # wrap my head around it.
 all:
 	@:;