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在创建用于代码生成的 MATLAB® 函数时,有一些特殊的注意事项。例如,使用 vararginvarargout、递归函数、匿名函数和嵌套函数时,存在某些限制。为了生成 MATLAB 递归函数的代码,代码生成器使用编译时递归或运行时递归。为了生成高效的 C/C++ 代码,代码生成器有时会创建一个函数的多个版本,称为函数特化。在某些情况下,您可以通过使用 coder.ignoreConstcoder.ignoreSize 来阻止代码生成器创建函数特化。生成 MEX 函数时,您可以绕过 MATLAB 代码中特定函数的代码生成,改用 MATLAB 引擎来执行调用。为此,请使用 coder.extrinsic 构造。


coder.extrinsic将函数声明为外部函数,并在 MATLAB 中执行它
coder.ignoreConstPrevent use of constant value of expression for function specializations
coder.ignoreSizePrevent code generator from creating function specializations for constant-size expressions (自 R2019b 起)
coder.mustBeComplexValidate that value lies on the complex plane (自 R2023b 起)
coder.mustBeConstValidate that value is a compile-time constant (自 R2023b 起)
coder.noImplicitExpansionInFunctionDisable implicit expansion within the specified function in the generated code (自 R2021b 起)
coder.sameSizeBinaryOpApply element-wise binary operations without implicit expansion (自 R2021b 起)
coder.specifyAsGPUSpecify that value is a GPU input to an entry-point function for GPU code generation (自 R2023b 起)



Nonconstant Index into varargin or varargout in a for-Loop

Force loop unrolling when the code generator cannot determine the value of the index into varargin or varargout.

Avoid Duplicate Functions in Generated Code

Reduce the occurrence of duplicate functions in the generated code.

Output Variable Must Be Assigned Before Run-Time Recursive Call

Troubleshoot output variable assignment for run-time recursion.

Compile-Time Recursion Limit Reached

Troubleshoot compile-time recursion limit error.



Resolve Issue: coder.inline("never") and coder.nonInlineCall Do Not Prevent Function Inlining

Troubleshoot instances of coder.inline('never') not preventing inlining.

Resolve Issue: Variables Must Be Fully Defined Before Use

Troubleshoot code generation errors when variables, including structure fields and class properties, are not defined before use.