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Difference between revisions of "CDT/Archive/designs/StaticAnalysis/CheckerIdeas"
< CDT | Archive | designs | StaticAnalysis
Line 12: | Line 12: | ||
(!(!x)) | (!(!x)) | ||
(x!=0 || 0!=x) | (x!=0 || 0!=x) | ||
+ | ;Comparison is used on "boolean" values | ||
+ | 0<x<3 | ||
+ | !x>5 | ||
;Consequent re-assignment without usage (sub-case of Value is never used after assignment) | ;Consequent re-assignment without usage (sub-case of Value is never used after assignment) | ||
x=1; | x=1; |
Revision as of 13:16, 27 March 2010
- Unused #include
#include <stdio.h> int main() { return 1; }
- Malloc called without sizeof consideration
int * arr = (int *)malloc(20); // should be malloc(20*sizeof(int))
- Assigned to itself
x = x;
- Result of comparison is constant
(x==x) (!x && x)
- Redundant comparison operations
(!(!x)) (x!=0 || 0!=x)
- Comparison is used on "boolean" values
0<x<3 !x>5
- Consequent re-assignment without usage (sub-case of Value is never used after assignment)
x=1; x=2;
- Value is never used after assignment
int x; x=23; return;
- Unused local variable
- local variable is not used in function
- Undeclared variable
- This is compiler error - catch early and have a quick fix so Ctrl-1 work like in java, I so like java quick fixes and code generation!
{ x = 5; }
- Quick fix
{ int x = 5; }