cairo-lang-sierra 2.19.2

Sierra representation.
Documentation 
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use crate::extensions::lib_func::{
    LibfuncSignature, SierraApChange, SignatureSpecializationContext,
};
use crate::extensions::{NoGenericArgsGenericLibfunc, SpecializationError};

/// Libfunc for aligning branches.
/// Used to equalize environment changes across merging paths.
/// This may include gas usage and AP changes.
#[derive(Default)]
pub struct BranchAlignLibfunc {}
impl NoGenericArgsGenericLibfunc for BranchAlignLibfunc {
    const STR_ID: &'static str = "branch_align";

    fn specialize_signature(
        &self,
        _context: &dyn SignatureSpecializationContext,
    ) -> Result<LibfuncSignature, SpecializationError> {
        Ok(LibfuncSignature::new_non_branch(vec![], vec![], SierraApChange::BranchAlign))
    }
}