# $NetBSD: cond-token-number.mk,v 1.7 2022/01/02 02:57:39 rillig Exp $
#
# Tests for number tokens in .if conditions.
#
# TODO: Add introduction.

.if 0
.  error
.endif

# Even though -0 is a number and would be accepted by strtod, it is not
# accepted by the condition parser.
#
# See the ch_isdigit call in CondParser_String.
.if -0
.  error
.else
.  error
.endif

# Even though +0 is a number and would be accepted by strtod, it is not
# accepted by the condition parser.
#
# See the ch_isdigit call in CondParser_String.
.if +0
.  error
.else
.  error
.endif

# Even though -1 is a number and would be accepted by strtod, it is not
# accepted by the condition parser.
#
# See the ch_isdigit call in CondParser_String.
.if !-1
.  error
.else
.  error
.endif

# Even though +1 is a number and would be accepted by strtod, it is not
# accepted by the condition parser.
#
# See the ch_isdigit call in CondParser_String.
.if !+1
.  error
.else
.  error
.endif

# When the number comes from a variable expression though, it may be signed.
# XXX: This is inconsistent.
.if ${:U+0}
.  error
.endif

# When the number comes from a variable expression though, it may be signed.
# XXX: This is inconsistent.
.if !${:U+1}
.  error
.endif

# Hexadecimal numbers are accepted.
.if 0x0
.  error
.endif
.if 0x1
.else
.  error
.endif

# This is not a hexadecimal number, even though it has an x.  It is
# interpreted as a string instead.  In a plain '.if', such a token evaluates
# to true if it is non-empty.  In other '.if' directives, such a token is
# evaluated by either FuncDefined or FuncMake.
.if 3x4
.else
.  error
.endif

# Make can do radix conversion from hex.
HEX=	dead
.if 0x${HEX} == 57005
.else
.  error
.endif

# Ensure that parsing continues until here.
.info End of the tests.

all: # nothing