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# $NetBSD: vardebug.mk,v 1.7 2021/02/04 21:42:47 rillig Exp $
#
# Demonstrates the debugging output for var.c.
.MAKEFLAGS: -dv FROM_CMDLINE=
VAR= added # VarAdd
VAR= overwritten # Var_Set
.undef VAR # Var_Delete (found)
.undef VAR # Var_Delete (not found)
# The variable with the empty name cannot be set at all.
${:U}= empty name # Var_Set
${:U}+= empty name # Var_Append
FROM_CMDLINE= overwritten # Var_Set (ignored)
VAR= 1
VAR+= 2
VAR+= 3
.if ${VAR:M[2]} # ModifyWord_Match
.endif
.if ${VAR:N[2]} # ModifyWord_NoMatch (no debug output)
.endif
.if ${VAR:S,2,two,} # ParseModifierPart
.endif
.if ${VAR:Q} # VarQuote
.endif
.if ${VAR:tu:tl:Q} # ApplyModifiers
.endif
# ApplyModifiers, "Got ..."
.if ${:Uvalue:${:UM*e}:Mvalu[e]}
.endif
.undef ${:UVAR} # Var_Delete
# When ApplyModifiers results in an error, this appears in the debug log
# as "is error", without surrounding quotes.
.if ${:Uvariable:unknown}
.endif
# XXX: The error message is "Malformed conditional", which is wrong.
# The condition is syntactically fine, it just contains an undefined variable.
#
# There is a specialized error message for "Undefined variable", but as of
# 2020-08-08, that is not covered by any unit tests. It might even be
# unreachable.
.if ${UNDEFINED}
.endif
# By default, .SHELL is not defined and thus can be set. As soon as it is
# accessed, it is initialized in the command line scope (during VarFind),
# where it is set to read-only. Assigning to it is ignored.
.MAKEFLAGS: .SHELL=overwritten
.MAKEFLAGS: -d0
all:
@:
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