Function argument default value

[lc-soft]

Description:

Need to determine the implementation of the function default value

Example code:

function run(a, b = 1, c = 2) {}

Reference:

• C++ Default arguments
• C++ Function Overloading

Cost:

1 week ~ 1 month

benefits:

Can set default values for function parameters.

Assignee:

Who do you want to be assignee for this feature?

• I will implement this feature
• Other contributors
• Maintainers
• I don't know

Contribution:

For this feature, I will provide these contributions:

• Contribute documentions
• Contribute testcases
• Develop other feuatres, or fix existing bugs
• Write an article to promote this project
• Fund this issue on IssueHunt
• Donate this project on OpenCollective
• I don't want to provide any help

[lc-soft]

Solution 1

Use macro define.

Example input:

run(100);
run(100, 24);
run(100, 24, 10);

Example output:

void run(int a, int b, int c);

#define run$3(a, b) run(a, b, 2)
#define run$2$3(a) run(a, 1, 2)

run$2$3(100);
run$3(100, 24);
run(100, 24, 10);