Autofix Signature Mismatch

Signature Mismatch Skill

Fixes errors where function calls don't match their declarations.

Detection Patterns

• no matching function for call to 'X'
• too many arguments to function 'X'
• too few arguments to function 'X'
• candidate function not viable

Strategy

1. Identify Function: Extract the function name and call location.
2. Find Declaration: Locate the function's declaration/definition.
3. Compare Signatures: Match call arguments against expected parameters.
4. Fix Mismatch: Adjust the call site or (rarely) the declaration.

Instructions

Step 1: Parse the Error

Extract:

• Function name
• Expected vs. provided argument count/types
• Location of the call

Step 2: Find Function Declaration

grep -r "returnType functionName(" --include="*.h"

Step 3: Analyze and Fix

Case: Too many arguments

// Declaration: void foo(int a);
// Call: foo(1, 2);  // ERROR: too many
// Fix: foo(1);

Case: Too few arguments

// Declaration: void bar(int a, int b);
// Call: bar(1);  // ERROR: too few
// Fix: bar(1, 0);  // Add default or required value

Case: Wrong type

// Declaration: void process(const char* str);
// Call: process(myString);  // myString is std::string
// Fix: process(myString.c_str());

Step 4: Verify

Ensure the fix compiles and maintains intended behavior.