# $NetBSD: vardebug.mk,v 1.10 2024/04/20 10:18:55 rillig Exp $
#
# Demonstrates the debugging output for var.c.

.MAKEFLAGS: -dv FROM_CMDLINE=

# expect: Global: VAR = added
VAR=		added		# VarAdd
# expect: Global: VAR = overwritten
VAR=		overwritten	# Var_Set
# expect: Global: delete VAR
.undef VAR
# expect: Global: ignoring delete 'VAR' as it is not found
.undef VAR

# The variable with the empty name cannot be set at all.
# expect: Global: ignoring ' = empty name' as the variable name '${:U}' expands to empty
${:U}=		empty name	# Var_Set
# expect: Global: ignoring ' += empty name' as the variable name '${:U}' expands to empty
${:U}+=		empty name	# Var_Append

FROM_CMDLINE=	overwritten	# Var_Set (ignored)

# expect: Global: VAR = 1
VAR=		1
# expect: Global: VAR = 1 2
VAR+=		2
# expect: Global: VAR = 1 2 3
VAR+=		3

# expect: Pattern for ':M' is "[2]"
# expect: Result of ${VAR:M[2]} is "2"
.if ${VAR:M[2]}			# ModifyWord_Match
.endif
# expect: Pattern for ':N' is "[2]"
# expect: Result of ${VAR:N[2]} is "1 3"
.if ${VAR:N[2]}			# ModifyWord_NoMatch
.endif

.if ${VAR:S,2,two,}		# ParseModifierPart
.endif

# expect: Result of ${VAR:Q} is "1\ 2\ 3"
.if ${VAR:Q}			# VarQuote
.endif

.if ${VAR:tu:tl:Q}		# ApplyModifiers
.endif

# ApplyModifiers, "Got ..."
# expect: Result of ${:Mvalu[e]} is "value" (eval-defined, defined)
.if ${:Uvalue:${:UM*e}:Mvalu[e]}
.endif

# expect: Global: delete VAR
.undef ${:UVAR}			# Var_Delete

# When ApplyModifiers results in an error, this appears in the debug log
# as "is error", without surrounding quotes.
# expect: Result of ${:unknown} is error (eval-defined, defined)
# expect+2: Malformed conditional (${:Uvariable:unknown})
# expect+1: while evaluating "${:Uvariable:unknown}": Unknown modifier "unknown"
.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.
# expect+1: Malformed conditional (${UNDEFINED})
.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.
# expect: Command: ignoring '.SHELL = overwritten' as it is read-only
.MAKEFLAGS: .SHELL=overwritten

.MAKEFLAGS: -d0