Method getPatternCaseKey

pkg/codegen/match.go:233–244

getPatternCaseKey returns the case key for a pattern. Constructor patterns return their full type name. Wildcard and variable patterns return "default".

(pattern ast.Pattern)

// Constructor patterns return their full type name.
// Wildcard and variable patterns return "default".
func (g *MatchCodeGen) getPatternCaseKey(pattern ast.Pattern) string {
	switch p := pattern.(type) {
	case *ast.ConstructorPattern:
		return g.constructorToTypeName(p.Name)
	case *ast.LiteralPattern:
		return "literal:" + p.Value
	case *ast.WildcardPattern, *ast.VariablePattern:
		return "default"
	default:
		return "default"
	}
}

// generateGroupedCase generates a single case clause for a group of arms.
// If the group has multiple arms, generates if/else chain for guards.