Control Flow is one of the interactive graphs Understand can draw of your code — call trees, dependencies, control flow, and more.
Control Flow
Languages: AnyTargets: Functions, Subprograms
Variants: Classic, Compare
Show the flow of control through a selected function, method, or subprogram as a flowchart.
The default shapes and colors are:
- Conditionals (
if/else if, and similar): diamond - Loops (
for,while,do while, and similar): oval catch/finally: ovaltry: hexagonswitch/case(and similar): octagon- Everything else: rectangle
- Unreachable code: red, regardless of shape
Edges leaving a conditional or loop are labeled for the branch taken.
For example, see the following code and corresponding graph
enum class Op { Add, Clamp, Zero };
int process(int* buf, int len, Op op, int limit) {
if (!buf || len <= 0) // diamond: true returns early
return 0;
int changed = 0;
for (int i = 0; i < len; ++i) { // oval: loop clause
switch (op) { // octagon: edge to each case
case Op::Add:
buf[i] += limit;
++changed;
break; // loops back to the oval above
case Op::Clamp:
if (buf[i] > limit) { // diamond
buf[i] = limit;
++changed;
} else if (buf[i] < -limit) { // diamond
buf[i] = -limit;
++changed;
}
break; // loops back to the oval above
case Op::Zero:
if (buf[i] != 0) { // diamond
buf[i] = 0;
++changed;
}
break; // loops back to the oval above
}
}
return changed;
}
Control Flow - Classic
Control Flow - Compare
The Compare variant shows how the graph has changed relative to the project's comparison database.
