1# $NetBSD: directive-for-errors.mk,v 1.6 2023/06/01 20:56:35 rillig Exp $ 2# 3# Tests for error handling in .for loops. 4 5 6# A .for directive must be followed by whitespace, everything else results 7# in a parse error. 8# expect+1: Unknown directive "fori" 9.fori in 1 2 3 10. warning <${i}> 11.endfor 12# expect-2: <> 13# expect-2: for-less endfor 14 15 16# A slash is not whitespace, therefore this is not parsed as a .for loop. 17# 18# XXX: The error message is misleading though. As of 2020-12-31, it says 19# 'Unknown directive "for"', but that directive is actually known. This is 20# because ForEval does not detect the .for loop as such, so parsing 21# continues in ParseLine > ParseDependencyLine > ParseDependency > 22# ParseDependencyTargets > ParseErrorNoDependency, and there the directive 23# name is parsed a bit differently. 24# expect+1: Unknown directive "for" 25.for/i in 1 2 3 26. warning <${i}> 27.endfor 28# expect-2: warning: <> 29# expect-2: for-less endfor 30 31 32# Before for.c 1.173 from 2023-05-08, the variable name could be an arbitrary 33# word, it only needed to be separated by whitespace. Even '$' and '\' were 34# valid variable names, which was not useful in practice. 35# 36# The '$$' was not replaced with the values '1' or '3' from the .for loop, 37# instead it was kept as-is, and when the .info directive expanded its 38# argument, each '$$' got replaced with a single '$'. The "long variable 39# expression" ${$} got replaced though, even though this would be a parse 40# error everywhere outside a .for loop. 41${:U\$}= dollar # see whether the "variable" '$' is local 42${:U\\}= backslash # see whether the "variable" '\' is local 43# expect+1: invalid character '$' in .for loop variable name 44.for $ \ in 1 2 3 4 45. info Dollar $$ ${$} $($) and backslash $\ ${\} $(\). 46.endfor 47 48# If there are no variables, there is no point in expanding the .for loop 49# since this would end up in an endless loop, consuming 0 of the 3 values in 50# each iteration. 51# expect+1: no iteration variables in for 52.for in 1 2 3 53# XXX: This should not be reached. It should be skipped, as already done 54# when the number of values is not a multiple of the number of variables, 55# see below. 56. warning Should not be reached. 57.endfor 58 59 60# There are 3 variables and 5 values. These 5 values cannot be split evenly 61# among the variables, therefore the loop is not expanded at all, it is 62# skipped instead. 63# expect+1: Wrong number of words (5) in .for substitution list with 3 variables 64.for a b c in 1 2 3 4 5 65. warning Should not be reached. 66.endfor 67 68 69# The list of values after the 'in' may be empty, no matter if this emptiness 70# comes from an empty expansion or even from a syntactically empty line. 71.for i in 72. info Would be reached if there were items to loop over. 73.endfor 74 75 76# A missing 'in' should parse the .for loop but skip the body. 77# expect+1: missing `in' in for 78.for i over k 79# XXX: As of 2020-12-31, this line is reached once. 80. warning Should not be reached. 81.endfor 82 83 84# A malformed modifier should be detected and skip the body of the loop. 85# 86# XXX: As of 2020-12-31, Var_Subst doesn't report any errors, therefore 87# the loop body is expanded as if no error had happened. 88# expect+1: Unknown modifier "Z" 89.for i in 1 2 ${:U3:Z} 4 90. warning Should not be reached. 91.endfor 92# expect-2: Should not be reached. 93# expect-3: Should not be reached. 94# expect-4: Should not be reached. 95