Add a semantic patch for fixing some cases of checkpatch.pl error: ERROR: do not use assignment in if condition
Signed-off-by: Kris Borer <kbo...@gmail.com> Acked-by: Julia Lawall <julia.law...@lip6.fr> --- scripts/coccinelle/style/assignment_in_if.cocci | 128 ++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 scripts/coccinelle/style/assignment_in_if.cocci diff --git a/scripts/coccinelle/style/assignment_in_if.cocci b/scripts/coccinelle/style/assignment_in_if.cocci new file mode 100644 index 0000000..b23db8f --- /dev/null +++ b/scripts/coccinelle/style/assignment_in_if.cocci @@ -0,0 +1,128 @@ +/// move assignments out of if conditions +/// +//# This script is designed to correct code where assignments exist in if +//# conditions. It is only capable of handling a subset of such problems. +//# Ideally it would handle all checkpatch errors of the following type: +//# ERROR: do not use assignment in if condition +//# +//# For example: +//# if(result = myfun()) +//# +//# would become: +//# result = myfun(); +//# if(result) +// +// Confidence: Moderate +// Copyright: (C) 2015 Kris Borer. GPLv2. +// URL: http://coccinelle.lip6.fr/ +// Comments: +// Options: --no-includes --include-headers + +virtual patch + + +// if ( (ret = call()) ) +// if ( (ret = call()) < 0 ) +@if1@ +expression i; +expression E, E2; +statement S1, S2; +binary operator b; +@@ + ++ i = E; + if ( +( +- (i = E) ++ i +| +- (i = E) ++ i + b ... +| +- (i = E), + E2 +) + ) S1 else S2 + + +// if ( ptr->fun && (ret = ptr->fun()) ) +@if2@ +expression i2; +expression E1, E2; +@@ + ++ if( E1 ) { ++ i2 = E2; ++ if (i2) { +- if( E1 && (i2 = E2) ) { + ... +- } ++ } ++ } + + +// if ( ptr->fun && (ret = ptr->fun()) < 0 ) +@if3@ +expression i2; +expression E1, E2; +constant c; +binary operator b; +@@ + ++ if( E1 ) { ++ i2 = E2; ++ if (i2 b c) { +- if( E1 && ((i2 = E2) b c) ) { + ... +- } ++ } ++ } + + +// if ( (ret = call()) && ret != -1 ) +// if ( (ret = call()) < 0 && ret != -1 ) +@if4@ +expression i; +expression E, E2; +statement S1, S2; +binary operator b; +@@ + ++ i = E; + if ( +( +- (i = E) ++ i +| + ( +- (i = E) ++ i + b + ...) +) + && E2 ) S1 else S2 + + +// if ( (ret = call()) && ret != -1 && ret != -2 ) +// if ( (ret = call()) < 0 && ret != -1 && ret != -2 ) +@if5@ +expression i; +expression E, E2, E3; +statement S1, S2; +binary operator b; +@@ + ++ i = E; + if ( +( +- (i = E) ++ i +| + ( +- (i = E) ++ i + b + ...) +) + && E2 && E3 ) S1 else S2 -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
