1# $NetBSD: directive-for-errors.mk,v 1.4 2023/05/08 10:24:07 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 ${i} 21.endfor 22 23# Before for.c 1.173 from 2023-05-08, the variable name could be an arbitrary 24# word, it only needed to be separated by whitespace. Even '$' and '\' were 25# valid variable names, which was not useful in practice. 26# 27# The '$$' was not replaced with the values '1' or '3' from the .for loop, 28# instead it was kept as-is, and when the .info directive expanded its 29# argument, each '$$' got replaced with a single '$'. The "long variable 30# expression" ${$} got replaced though, even though this would be a parse 31# error everywhere outside a .for loop. 32${:U\$}= dollar # see whether the "variable" '$' is local 33${:U\\}= backslash # see whether the "variable" '\' is local 34.for $ \ in 1 2 3 4 35. info Dollar $$ ${$} $($) and backslash $\ ${\} $(\). 36.endfor 37 38# If there are no variables, there is no point in expanding the .for loop 39# since this would end up in an endless loop, consuming 0 of the 3 values in 40# each iteration. 41.for in 1 2 3 42# XXX: This should not be reached. It should be skipped, as already done 43# when the number of values is not a multiple of the number of variables, 44# see below. 45. warning Should not be reached. 46.endfor 47 48# There are 3 variables and 5 values. These 5 values cannot be split evenly 49# among the variables, therefore the loop is not expanded at all, it is 50# skipped instead. 51.for a b c in 1 2 3 4 5 52. warning Should not be reached. 53.endfor 54 55# The list of values after the 'in' may be empty, no matter if this emptiness 56# comes from an empty expansion or even from a syntactically empty line. 57.for i in 58. info Would be reached if there were items to loop over. 59.endfor 60 61# A missing 'in' should parse the .for loop but skip the body. 62# expect+1: missing `in' in for 63.for i over k 64# XXX: As of 2020-12-31, this line is reached once. 65. warning Should not be reached. 66.endfor 67 68# A malformed modifier should be detected and skip the body of the loop. 69# 70# XXX: As of 2020-12-31, Var_Subst doesn't report any errors, therefore 71# the loop body is expanded as if no error had happened. 72.for i in 1 2 ${:U3:Z} 4 73. warning Should not be reached. 74.endfor 75