Convert if-elseif-else patterns to switch-case statements

Generate code for if-elseif-else logic as switch-case statements

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Model Configuration Pane: Code Generation / Code Style

Description

Specify whether to generate code for if-elseif-else decision logic as switch-case statements.

This readability optimization works on a per-model basis and applies only to:

Flow charts in Stateflow^® charts
MATLAB^® functions in Stateflow charts
MATLAB Function blocks in that model

Settings

on (default) | off

Default: on

On: Generate code for if-elseif-else decision logic as switch-case statements.
Off: Preserve if-elseif-else decision logic in generated code.

Examples

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Control Generation of Switch-Case Statements for If-ElseIf-Else Patterns

Compare the logic patterns in the generated code when you set Convert if-elseif-else patterns to switch-case statements to different values.

Here is generated code that generated using the default Convert if-elseif-else patterns to switch-case statements value off:

if (x == 1) {
       y = 1;
} else if (x == 2) {
       y = 2;
} else if (x == 3) {
       y = 3;
} else {
       y = 4;
}

Here is the same code generated with Convert if-elseif-else patterns to switch-case statements set to on:

switch (x) {
     case 1:
       y = 1; break;
     case 2:
       y = 2; break;
     case 3:
       y = 3; break;
     default:
       y = 4; break;
}

Recommended Settings

Application	Setting
Debugging	No impact
Traceability	Off
Efficiency	On (execution, ROM), No impact (RAM)
Safety precaution	No impact

Programmatic Use

Parameter: ConvertIfToSwitch

Type: character vector

Value: 'on' | 'off'

Default: 'on'

Version History

Introduced in R2009b