matlab.lang.correction.ReplaceIdentifierCorrection Class

Namespace: matlab.lang.correction

Correct error by replacing identifier in function call

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Description

Use ReplaceIdentifierCorrection objects in functions that throw an MException object. MException uses ReplaceIdentifierCorrection instances to display suggestions for incorrect identifiers in function calls.

Creation

Description

ric = matlab.lang.correction.ReplaceIdentifierCorrection(identifier,replacement) creates a correction that suggests replacing identifier with replacement in the function call that threw the MException object.

example

Input Arguments

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Incorrect identifier in the function call, specified as a string scalar or character vector. identifier must be a valid MATLAB® identifier. A valid MATLAB identifier is a string scalar or character vector of alphanumerics (A–Z, a–z, 0–9) and underscores, where the first character is a letter and the length of the text is less than or equal to namelengthmax.

Suggested identifier for use in the function call, specified as a string scalar or character vector. replacement must be a valid MATLAB identifier.

Examples

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The functions walk and sprint require their input arguments to fall within different ranges, and their ranges do not overlap. To add a suggested replacement to the error message when one of these functions is called with an incorrect value, include a ReplaceIdentifierCorrection instance in each function.

Create the function walk by saving the following code in walk.m.

function walk(speed)
if speed > 6.5
    ric = matlab.lang.correction.ReplaceIdentifierCorrection('walk', 'sprint');
    error(ric, 'walk:maxSpeed', 'Cannot walk faster than 6.5 km/h.')
elseif speed <= 0
    error('walk:minSpeed', 'Speed must be greater than zero.')
end
fprintf('You are walking at a speed of %2.2f km/h.\n', speed)
end

Create the function sprint by saving this code in sprint.m.

function sprint(speed)
if speed <= 6.5
    ric = matlab.lang.correction.ReplaceIdentifierCorrection('sprint', 'walk');
    error(ric, 'sprint:minSpeed', 'Cannot sprint slower than 6.5 km/h.')
elseif speed > 20
    error('sprint:maxSpeed', 'Cannot sprint faster than 20 km/h.')
end
fprintf('You are sprinting at a speed of %2.2f km/h.\n', speed)
end

Call walk with an input greater than 6.5.

walk(10)
Error using walk (line 4)
Cannot walk faster than 6.5 km/h.

Did you mean:
>> sprint(10)

Version History

Introduced in R2019b

See Also

Functions

Properties