Main Content

Code Appearance

Configure parameters that modify identifiers, code style, and comments

Model configuration parameters allow you to configure the appearance of the generated code. You can change the style of comments in the code, modify how identifiers are generated, specify code style, and modify code generation template files to specify custom file and function banners.

Topics

Code Comments

Add Custom Comments for Variables in the Generated Code

Add selected data object property values as a comment in the general code above that data object identifier.

Add Global Comments in the Generated Code

Add global comments to a Simulink® model so that the comment text appears where you specify in the generated files.

Annotate Code for Justifying Polyspace Checks

This example shows how to turn on comments in the generated code that suppress error detection through Polyspace.

Include MATLAB Code as Comments in Generated Code

Correlate code generated for a MATLAB Function block with MATLAB® source code.

Identifiers

Identifier Format Control

You can customize generated identifiers by specifying the Identifier format control parameters on the Code Generation > Identifiers pane in the Configuration Parameters dialog box.

Specify Identifier Length to Avoid Naming Collisions

Use the Maximum identifier length parameter to limit the number of characters in function, type definition, and variable names.

Specify Reserved Names for Generated Identifiers

Specify a set of names that the code generation process should not use.

Customize Generated Identifier Naming Rules

Customize the naming of identifiers in the generated code.

Avoid Identifier Name Collisions with Referenced Models

Specify parameter values to avoid identifier name collisions with referenced models.

Control Name Mangling in Generated Identifiers

Specify the position and length of name-mangling text in generated identifiers.

Specify Boolean and Data Type Limit Identifiers

Integrate the generated code with your code by specifying the identifiers that correspond to Boolean false and true. Also, specify the identifiers that correspond to data type limits, which the generated code uses to determine overflows.

Reserved Keywords

If you use the code generator to produce C or C++ code, your model must not contain keywords that are reserved for internal use.

Maintain Traceability for Generated Identifiers

To verify your model, you can trace back and forth between generated identifiers and corresponding entities within the model.

Exceptions to Identifier Formatting Conventions

There are some exceptions to identifier formatting conventions for type names, non-Auto storage classes, and shared utilities.

Identifier Format Control Parameters Limitations

There are some limitations pertaining to how autogenerated identifiers comply with the setting of the Maximum identifier length parameter.

Code Style

Enhance Readability of Code for Flow Charts

Describes how to convert if-elseif-else code to switch-case statements to enhance readability of generated code.

Enhance Code Readability for MATLAB Function Blocks

Convert if-elseif-else code to switch-case statements.

Improve Data Coherency in Generated Code

Generate a single unique variable for each Data Store read and write operation and thereby enhance Data Coherency.

Control Parentheses in Generated Code

Specify how parentheses are placed in the code.

Optimize Code by Reordering Commutable Operands

Reorder the execution of operands in the generated code to improve efficiency.

Suppress Generation of Default Cases for Unreachable Stateflow Switch Statements

Specify if a default case is generated among switch-case statements.

Replace Multiplication by Powers of Two with Signed Bitwise Shifts

Specify whether to replaces multiplication by powers of two with signed bitwise shifts.

Generate Code Containing Right Shifts on Signed Integers

Specify whether the generated code contains right shifts on signed integers.

Control Cast Expressions in Generated Code

Control the data type casts that the code generator specifies in the generated code.

Code Templates

Customize Code Organization and Format

Custom file processing (CFP) tools allow you to customize the organization and formatting of generated code.

Code Generation Template (CGT) Files

Code Generation Template (CGT) files define the top-level organization and formatting of generated source code and header files.

Custom File Processing (CFP) Templates

A custom file processing (CFP) template imposes a simple structure on the code generation process.

Specify Templates For Code Generation

Create CGT files and CFP templates to use custom file processing features.

Generate Custom File and Function Banners

Using code generation template (CGT) files, you can specify custom file banners and function banners for the generated code files.

Change the Organization of a Generated File

Use data and code templates to change the organization of generated files.

Customize Generated File Names

Customize generated file names by using file naming rules.

Generate Source and Header Files with a Custom File Processing (CFP) Template

This example shows you the process of generating a simple source (.c or .cpp) and header (.h) file using the example CFP template.

Comparison of a Template and Its Generated File

You can use a template to define what code the code generator adds to the generated file, control the location of code in the file, and optionally insert comments in the generated file.

Code Template API Summary

The code template API includes functions to obtain the names of the standard model files and other model-related information.

Template Symbols and Rules

This topic describes template symbols and rules for using them.

Featured Examples