1# $NetBSD: cond-func.mk,v 1.13 2023/06/01 20:56:35 rillig Exp $ 2# 3# Tests for those parts of the functions in .if conditions that are common 4# among several functions. 5# 6# The below test uses the 'defined' function since it has no side-effects. 7# The other functions would work equally well, except for 'empty', which 8# parses its argument differently from the other functions. 9# 10 11DEF= defined 12${:UA B}= variable name with spaces 13${:UVAR(value)}= variable name with parentheses 14${:UVAR{value}}= variable name with balanced braces 15 16# Really strange variable names must be given indirectly via another variable, 17# so that no unbalanced braces appear in the top-level expression. 18VARNAME_UNBALANCED_BRACES= VAR{{{value 19${VARNAME_UNBALANCED_BRACES}= variable name with unbalanced braces 20 21.if !defined(DEF) 22. error 23.endif 24 25# Horizontal whitespace (space tab) after the opening parenthesis is ignored. 26.if !defined( DEF) 27. error 28.endif 29 30# Horizontal whitespace (space tab) before the closing parenthesis is ignored. 31.if !defined(DEF ) 32. error 33.endif 34 35# The argument of a function must not directly contain whitespace. 36# expect+1: Missing closing parenthesis for defined() 37.if !defined(A B) 38. error 39.endif 40 41# If necessary, the whitespace can be generated by a variable expression. 42.if !defined(${:UA B}) 43. error 44.endif 45 46# Characters that could be mistaken for operators must not appear directly 47# in a function argument. As with whitespace, these can be generated 48# indirectly. 49# 50# It's not entirely clear why these characters are forbidden. 51# The most plausible reason seems to be typo detection. 52# expect+1: Missing closing parenthesis for defined() 53.if !defined(A&B) 54. error 55.endif 56# expect+1: Missing closing parenthesis for defined() 57.if !defined(A|B) 58. error 59.endif 60 61# Even parentheses may appear in variable names. 62# They must be balanced though. 63.if !defined(VAR(value)) 64. error 65.endif 66 67# Braces do not have any special meaning when parsing arguments. 68.if !defined(VAR{value}) 69. error 70.endif 71 72# Braces do not have any special meaning when parsing arguments. 73# They don't need to be balanced. 74.if !defined(VAR{{{value) 75. error 76.endif 77 78# There may be spaces around the operators and parentheses, and even 79# inside the parentheses. The spaces inside the parentheses are not 80# allowed for the 'empty' function (see cond-func-empty.mk), therefore 81# they are typically omitted for the other functions as well. 82.if ! defined ( DEF ) 83. error 84.endif 85 86# The following condition is interpreted as defined(A) && defined(B). 87# In lack of a function call expression, each kind of .if directive has a 88# default function that is called when a bare word is parsed. For the plain 89# .if directive, this function is defined(); see "struct If ifs" in cond.c. 90.if A&B 91. error 92.endif 93 94.if defined() 95. error 96.else 97# expect+1: The empty variable is never defined. 98. info The empty variable is never defined. 99.endif 100 101# The plain word 'defined' is interpreted as 'defined(defined)', see 102# CondParser_ComparisonOrLeaf. 103# That variable is not defined (yet). 104.if defined 105. error 106.else 107# expect+1: A plain function name is parsed as defined(...). 108. info A plain function name is parsed as defined(...). 109.endif 110 111# If a variable named 'defined' is actually defined, the bare word 'defined' 112# is interpreted as 'defined(defined)', and the condition evaluates to true. 113defined= # defined but empty 114.if defined 115# expect+1: A plain function name is parsed as defined(...). 116. info A plain function name is parsed as defined(...). 117.else 118. error 119.endif 120 121# A plain symbol name may start with one of the function names, in this case 122# 'defined'. 123.if defined-var 124. error 125.else 126# expect+1: Symbols may start with a function name. 127. info Symbols may start with a function name. 128.endif 129 130defined-var= # defined but empty 131.if defined-var 132# expect+1: Symbols may start with a function name. 133. info Symbols may start with a function name. 134.else 135. error 136.endif 137 138# expect+1: Missing closing parenthesis for defined() 139.if defined( 140. error 141.else 142. error 143.endif 144