106 lines
2.0 KiB
Makefile
106 lines
2.0 KiB
Makefile
# $NetBSD: cond-token-number.mk,v 1.8 2023/03/04 08:07:29 rillig Exp $
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#
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# Tests for number tokens in .if conditions.
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#
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# TODO: Add introduction.
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.if 0
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. error
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.endif
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# Even though -0 is a number and would be accepted by strtod, it is not
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# accepted by the condition parser.
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#
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# See the ch_isdigit call in CondParser_String.
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.if -0
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. error
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.else
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. error
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.endif
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# Even though +0 is a number and would be accepted by strtod, it is not
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# accepted by the condition parser.
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#
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# See the ch_isdigit call in CondParser_String.
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.if +0
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. error
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.else
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. error
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.endif
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# Even though -1 is a number and would be accepted by strtod, it is not
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# accepted by the condition parser.
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#
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# See the ch_isdigit call in CondParser_String.
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.if !-1
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. error
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.else
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. error
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.endif
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# Even though +1 is a number and would be accepted by strtod, it is not
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# accepted by the condition parser.
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#
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# See the ch_isdigit call in CondParser_String.
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.if !+1
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. error
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.else
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. error
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.endif
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# When the number comes from a variable expression though, it may be signed.
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# XXX: This is inconsistent.
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.if ${:U+0}
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. error
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.endif
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# When the number comes from a variable expression though, it may be signed.
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# XXX: This is inconsistent.
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.if !${:U+1}
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. error
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.endif
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# Hexadecimal numbers are accepted.
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.if 0x0
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. error
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.endif
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.if 0x1
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.else
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. error
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.endif
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# This is not a hexadecimal number, even though it has an x. It is
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# interpreted as a string instead. In a plain '.if', such a token evaluates
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# to true if it is non-empty. In other '.if' directives, such a token is
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# evaluated by either FuncDefined or FuncMake.
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.if 3x4
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.else
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. error
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.endif
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# Make can do radix conversion from hex.
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HEX= dead
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.if 0x${HEX} == 57005
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.else
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. error
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.endif
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# Very small numbers round to 0.
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.if 12345e-400
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. error
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.endif
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.if 12345e-200
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.else
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. error
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.endif
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# Very large numbers round up to infinity on IEEE 754 implementations, or to
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# the largest representable number (VAX); in particular, make does not fall
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# back to checking whether a variable of that name is defined.
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.if 12345e400
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.else
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. error
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.endif
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all:
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