[src/trunk]: src/usr.bin/make/unit-tests make(1): add tests for extreme edge ...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c38ac4368497
branches:  trunk
changeset: 948774:c38ac4368497
user:      rillig <rillig%NetBSD.org@localhost>
date:      Thu Dec 31 13:23:43 2020 +0000

description:
make(1): add tests for extreme edge cases of .for loop expansion

diffstat:

 usr.bin/make/unit-tests/directive-for-escape.exp |   8 ++++++++
 usr.bin/make/unit-tests/directive-for-escape.mk  |  20 +++++++++++++++++++-
 2 files changed, 27 insertions(+), 1 deletions(-)

diffs (49 lines):

diff -r 2ca596c65d45 -r c38ac4368497 usr.bin/make/unit-tests/directive-for-escape.exp
--- a/usr.bin/make/unit-tests/directive-for-escape.exp  Thu Dec 31 12:34:33 2020 +0000
+++ b/usr.bin/make/unit-tests/directive-for-escape.exp  Thu Dec 31 13:23:43 2020 +0000
@@ -38,6 +38,14 @@
 For: loop body:
 .  info ${:U\$}
 make: "directive-for-escape.mk" line 60: $
+For: end for 1
+For: loop body:
+.  info ${NUMBERS} ${:Ureplaced}
+make: "directive-for-escape.mk" line 68: one two three replaced
+For: end for 1
+For: loop body:
+.  info ${:Ureplaced}
+make: "directive-for-escape.mk" line 78: replaced
 make: no target to make.
 
 make: stopped in unit-tests
diff -r 2ca596c65d45 -r c38ac4368497 usr.bin/make/unit-tests/directive-for-escape.mk
--- a/usr.bin/make/unit-tests/directive-for-escape.mk   Thu Dec 31 12:34:33 2020 +0000
+++ b/usr.bin/make/unit-tests/directive-for-escape.mk   Thu Dec 31 13:23:43 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: directive-for-escape.mk,v 1.1 2020/12/31 03:05:12 rillig Exp $
+# $NetBSD: directive-for-escape.mk,v 1.2 2020/12/31 13:23:43 rillig Exp $
 #
 # Test escaping of special characters in the iteration values of a .for loop.
 # These values get expanded later using the :U variable modifier, and this
@@ -59,3 +59,21 @@
 .for i in ${:U\$}
 .  info ${i}
 .endfor
+
+# As of 2020-12-31, the name of the iteration variable can even contain
+# colons, which then affects variable expressions having this exact modifier.
+# This is clearly an unintended side effect of the implementation.
+NUMBERS=       one two three
+.for NUMBERS:M*e in replaced
+.  info ${NUMBERS} ${NUMBERS:M*e}
+.endfor
+
+# As of 2020-12-31, the name of the iteration variable can contain braces,
+# which gets even more surprising than colons, since it allows to replace
+# sequences of variable expressions.  There is no practical use case for
+# this, though.
+BASENAME=      one
+EXT=           .c
+.for BASENAME}${EXT in replaced
+.  info ${BASENAME}${EXT}
+.endfor