[Feature] Hexadecimal input values (0xff) rejected while other compilers accept

[chamitro]

🐛 Bug Report

Hexadecimal input values (e.g., 0xfffield) are rejected by Leo, while Circom, Noir, and Cairo all accept them and correctly interpret them as their decimal equivalent (255).

Steps to Reproduce

Code snippet to reproduce

program mutadiff_test.aleo {
    transition main(public a: field) -> field {
        return a + 1field;
    }
}

# Decimal — works
leo run main 255field
# Output: 256field ✓

# Hex — rejected!
leo run main 0xfffield
# Error

Stack trace & error message

Leo rejects the hex input with a parsing error.

Expected Behavior

Accept 0xff as decimal 255, consistent with Circom, Noir, and Cairo.

Cross-compiler comparison:

Input	Circom	Noir	Cairo	Leo
0xff	Accepts (255)	Accepts (255)	Accepts (255)	❌ Rejects
0xFF	Accepts (255)	Accepts (255)	Accepts (255)	❌ Rejects

Leo is the only compiler among the 4 tested that rejects hexadecimal inputs.

Your Environment

• Leo Version: 3.5.0
• Rust Version: 1.93.0
• Computer OS: Ubuntu