<< Block Code Coverage | Method Code Coverage >>

Logical Blocks

Runtime Analysis

catch ( UnLucky & u ) {
throw u;
} /* potentially terminal statement */
return 0; /* sequence block */
}

Each simple block is a branch. Every C++ function and method contains at least one
simple block corresponding to its main body.

Decisions (Implicit Blocks)

Implicit blocks are introduced by IF statements without an ELSE statement, and a
SWITCH statements without a DEFAULT statement.

/* Power_of_10 function */
/* -BLOCK=DECISION or -BLOCK=IMPLICIT */
int power_of_10 ( int value, int max )
{
int retval = value, i;
if ( value == 0 ) return 0; else ;
for ( i = 0; i < 10; i++ )
{
retval = ( max / 10 ) < retval ? retval * 10 : max;
}
return retval;
}
/* Near_color function */
ColorType near_color ( ColorType color )
{
switch ( color )
{
case WHITE :
case LIGHT_GRAY :
return WHITE;
case RED :
case PINK :
case BURGUNDY :
return RED;
/* etc ... with no default */
default : ;
}
}

Each implicit block represents a branch.

Since the sum of all possible decision paths includes implicit blocks as well as simple
blocks, reports provide the total number of simple and implicit blocks as a figure and
a percentage after the term decisions.

Loops (Logical Blocks)

Three branches are created in a for or while loop:

The first branch is the simple block contained within the loop, and that is
executed zero times (the entry condition is false from the start).

The second branch is the simple block executed exactly once (entry condition
true, then false the next time).