CVS log for src/usr.bin/make/unit-tests/varmod-range.mk

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make: omit redundant follow-up message "Malformed conditional"

If there is a parse error or an evaluation error during the conditional,
the conditional is already mentioned in the "while evaluating condition"
line, so there's no reason to repeat it once again.

Same for the "Bad condition" message from the '?:' modifier.

make: reduce line length in error messages

The error messages for deeply nested parse errors were hard to decipher,
due to the large amount of text.  Split these messages into individual
lines, just as in the backtrace for .include files and .for loops.  This
unified backtrace makes the output more uniform.

make: in error message about conditionals, use single quotes

Single quotes are used less often in the conditionals themselves, which
leads to fewer confusions.

make: in error messages for anonymous variables, log the value

make: add more context information to error messages

In case of a parse error or evaluation error, print the variable value
in addition to the variable name, to see the effects of previous
expression modifiers.

In nested make calls, print the current directory at the bottom of a
stack trace, as that information is otherwise hard to get in a parallel
build spanning multiple directories.

make: provide more context information for parse/evaluate errors

tests/make: extend tests for include guards and empty expressions

tests/make: replace 'variable expression' with 'expression'

Each expression is based on a variable, there's no need for the
verbosity.  The wording in make's diagnostics will be changed in a
follow-up commit.

tests/make: force line-based diagnostics to be listed in the tests

This way, contradictions between the intended output and the actual
output are closer together and have a better chance of being spotted.

make(1): treat malformed :range, :ts and :[...] as errors

Before, integer overflow in the :[1..2] modifier had not been detected,
and the actual behavior varied between ILP64 and LP64I32 machines.

Before, the :ts modifier accepted character literals like \012345 and
\x1F600, which don't fit in a single character and were thus truncated.

Before, the :range modifier issued an "Unknown modifier" error message
for :range=x, which was not quite correct.  The error message in this
case is now "Invalid number".

make(1): add tests for the variable modifiers :[words] and :range

make(1): add more tests for the variable modifier :range, edge cases

make(1): add test cases for the :range variable modifier

make(1): move tests for :hash :range :localtime into separate files

make(1): describe the purpose of each newly added unit test dummy

make(1): add dummies for fine-grained tests, one per single feature

The test names have been derived from the current manual page.

All these tests are dummies right now, and the code from the existing
tests will be moved into the new tests step by step.

This is done to prevent modmisc, escape, varmod-edge and varmisc from
growing without any bounds, and to reduce the side-effects of one test
to the others.