1# $NetBSD: directive-for-errors.mk,v 1.3 2021/04/04 10:13:09 rillig Exp $
2#
3# Tests for error handling in .for loops.
4
5# A .for directive must be followed by whitespace, everything else results
6# in a parse error.
7.fori in 1 2 3
8.  warning ${i}
9.endfor
10
11# A slash is not whitespace, therefore this is not parsed as a .for loop.
12#
13# XXX: The error message is misleading though.  As of 2020-12-31, it says
14# "Unknown directive "for"", but that directive is actually known.  This is
15# because ForEval does not detect the .for loop as such, so parsing
16# continues in ParseLine > ParseDependencyLine > ParseDependency >
17# ParseDependencyTargets > ParseErrorNoDependency, and there the directive
18# name is parsed a bit differently.
19.for/i in 1 2 3
20.  warning ${i}
21.endfor
22
23# As of 2020-12-31, the variable name can be an arbitrary word, it just needs
24# to be separated by whitespace.  Even '$' and '\' are valid variable names,
25# which is not useful in practice.
26#
27# The '$$' is not replaced with the values '1' or '3' from the .for loop,
28# instead it is kept as-is, and when the .info directive expands its argument,
29# each '$$' gets replaced with a single '$'.  The "long variable expression"
30# ${$} gets replaced though, even though this would be a parse error everywhere
31# outside a .for loop.
32#
33# The '\' on the other hand is treated as a normal variable name.
34${:U\$}=	dollar		# see whether the "variable" '$' is local
35${:U\\}=	backslash	# see whether the "variable" '\' is local
36.for $ \ in 1 2 3 4
37.  info Dollar $$ ${$} $($) and backslash $\ ${\} $(\).
38.endfor
39
40# If there are no variables, there is no point in expanding the .for loop
41# since this would end up in an endless loop, each time consuming 0 of the
42# 3 values.
43.for in 1 2 3
44# XXX: This should not be reached.  It should be skipped, as already done
45# when the number of values is not a multiple of the number of variables,
46# see below.
47.  warning Should not be reached.
48.endfor
49
50# There are 3 variables and 5 values.  These 5 values cannot be split evenly
51# among the variables, therefore the loop is not expanded at all, it is
52# rather skipped.
53.for a b c in 1 2 3 4 5
54.  warning Should not be reached.
55.endfor
56
57# The list of values after the 'in' may be empty, no matter if this emptiness
58# comes from an empty expansion or even from a syntactically empty line.
59.for i in
60.  info Would be reached if there were items to loop over.
61.endfor
62
63# A missing 'in' should parse the .for loop but skip the body.
64.for i : k
65# XXX: As of 2020-12-31, this line is reached once.
66.  warning Should not be reached.
67.endfor
68
69# A malformed modifier should be detected and skip the body of the loop.
70#
71# XXX: As of 2020-12-31, Var_Subst doesn't report any errors, therefore
72# the loop body is expanded as if no error had happened.
73.for i in 1 2 ${:U3:Z} 4
74.  warning Should not be reached.
75.endfor
76