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opt_eei.c revision 1.10 
      1 /* $NetBSD: opt_eei.c,v 1.10 2023/05/15 12:59:43 rillig Exp $ */
      2 
      3 /*
      4  * Tests for the options '-eei' and '-neei'.
      5  *
      6  * The option '-eei' enables extra indentation on continuation lines of the
      7  * expression part of 'if' and 'while' statements. These continuation lines
      8  * are indented one extra level to avoid being confused for the first
      9  * statement of the body, even if the condition line starts with an operator
     10  * such as '&&' or '<' that could not start a statement.
     11  *
     12  * The option '-neei' indents these conditions in the same way as all other
     13  * continued statements.
     14  */
     15 
     16 //indent input
     17 {
     18 	if (a <
     19 b)
     20 		stmt();
     21 	if (a
     22 <
     23 b)
     24 		stmt();
     25 	while (a
     26 < b)
     27 		stmt();
     28 	switch (
     29 		a)
     30 		stmt();
     31 }
     32 //indent end
     33 
     34 /*
     35  * By default, continuation lines are aligned on parentheses, and only a
     36  * multi-line switch statement would have ambiguous indentation.
     37  */
     38 //indent run
     39 {
     40 	if (a <
     41 	    b)
     42 		stmt();
     43 	if (a
     44 	    <
     45 	    b)
     46 		stmt();
     47 	while (a
     48 	       < b)
     49 		stmt();
     50 	switch (
     51 		a)
     52 		stmt();
     53 }
     54 //indent end
     55 
     56 //indent run-equals-prev-output -neei
     57 
     58 /*
     59  * For indentation 8, the only expression that needs to be disambiguated is
     60  * the one from the switch statement.
     61  */
     62 //indent run -eei
     63 {
     64 	if (a <
     65 /* $ XXX: No extra indentation necessary. */
     66 			b)
     67 		stmt();
     68 	if (a
     69 /* $ XXX: No extra indentation necessary. */
     70 			<
     71 /* $ XXX: No extra indentation necessary. */
     72 			b)
     73 		stmt();
     74 	while (a
     75 /* $ XXX: No extra indentation necessary. */
     76 			< b)
     77 		stmt();
     78 	switch (
     79 			a)
     80 		stmt();
     81 }
     82 //indent end
     83 
     84 /* For indentation 4, the expressions from the 'if' are ambiguous. */
     85 //indent run -neei -i4
     86 {
     87     if (a <
     88 	b)
     89 	stmt();
     90     if (a
     91 	<
     92 	b)
     93 	stmt();
     94     while (a
     95 	   < b)
     96 	stmt();
     97     switch (
     98 	    a)
     99 	stmt();
    100 }
    101 //indent end
    102 
    103 //indent run -eei -i4
    104 {
    105     if (a <
    106 	    b)
    107 	stmt();
    108     if (a
    109 	    <
    110 	    b)
    111 	stmt();
    112     while (a
    113 /* $ XXX: No extra indentation necessary. */
    114 	    < b)
    115 	stmt();
    116     switch (
    117 /* $ XXX: No extra indentation necessary. */
    118 	    a)
    119 	stmt();
    120 }
    121 //indent end
    122 
    123 /*
    124  * The -nlp option uses a fixed indentation for continuation lines. The if
    125  * statements are disambiguated.
    126  */
    127 //indent run -eei -i4 -nlp
    128 {
    129     if (a <
    130 	    b)
    131 	stmt();
    132     if (a
    133 	    <
    134 	    b)
    135 	stmt();
    136     while (a
    137 	    < b)
    138 	stmt();
    139     switch (
    140 	    a)
    141 	stmt();
    142 }
    143 //indent end
    144 
    145 /* With a continuation indentation of 2, there is no ambiguity at all. */
    146 //indent run -eei -i6 -ci2 -nlp
    147 {
    148       if (a <
    149 	b)
    150 	    stmt();
    151       if (a
    152 	<
    153 	b)
    154 	    stmt();
    155       while (a
    156 	< b)
    157 	    stmt();
    158       switch (
    159 	a)
    160 	    stmt();
    161 }
    162 //indent end
    163